CFD Modeling Activities at the NASA Stennis Space … Modeling Activities at the NASA Stennis Space...
49
CFD Modeling Activities at the NASA Stennis Space Center Presentation to the LSU Mechanical Engineering Department March 16, 2007 Daniel Allgood, PhD NASA Stennis Space Center Technology Development and Transfer NTOG - Jacobs Technology RELEASED - Printed documents may be obsolete; validate prior to use. https://ntrs.nasa.gov/search.jsp?R=20070012351 2018-05-29T13:29:32+00:00Z
Transcript of CFD Modeling Activities at the NASA Stennis Space … Modeling Activities at the NASA Stennis Space...
CFD
Mod
elin
g A
ctiv
ities
at th
eN
ASA
Ste
nnis
Spa
ce C
ente
rPr
esen
tatio
n to
the
LSU
Mec
hani
cal E
ngin
eerin
g D
epar
tmen
t
Mar
ch 1
6, 2
007
Dan
iel A
llgoo
d, P
hDN
ASA
Ste
nnis
Spa
ce C
ente
rTe
chno
logy
Dev
elop
men
t and
Tra
nsfe
rN
TOG
-Ja
cobs
Tec
hnol
ogy
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
https://ntrs.nasa.gov/search.jsp?R=20070012351 2018-05-29T13:29:32+00:00Z
2
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
OU
TLIN
E
Ove
rvie
w o
f NA
SA
Ste
nnis
Spa
ce C
ente
r
Rol
e of
Com
puta
tiona
l Mod
elin
g at
NA
SA
-SS
C
Com
puta
tiona
l Mod
elin
g To
ols
and
Res
ourc
es
CFD
Mod
elin
g A
pplic
atio
ns
•C
ryog
enic
Pro
pella
nt D
eliv
ery
Sys
tem
s (T
anks
, Run
lines
)
•P
rope
llant
Con
trol E
lem
ents
(Val
ves)
•Fl
ow M
easu
rem
ent D
evic
es (C
avita
ting
Ven
turie
s, R
TDs)
•P
lum
e M
odel
ing:
Hyd
roca
rbon
Plu
mes
and
Dia
gnos
tic S
uppo
rtC
once
ptua
l Sta
ge T
estin
g R
ELEA
SED
- Pr
inte
d do
cum
ents
may
be
obso
lete
; val
idat
e pr
ior t
o us
e.
3
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Reg
iona
l Map
of N
ASA
-SSC
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
4
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
NA
SA-S
SC T
est F
acili
ties
E-1
Stan
dH
igh
Pres
s., F
ull S
cale
En
gine
Com
pone
nts
E-2
Hig
h Pr
ess.
Mid
-Sca
le&
Sub
scal
e
A-1
…Fu
ll Sc
ale
Engi
ne D
evt.
& C
ert
…A
-2
E-3
Hig
h Pr
ess.
Smal
l-Sca
leSu
bsca
leB
-1/B
-2…
Full
Scal
e En
gine
/Sta
ge D
evt.
& C
ert
Com
pone
nts
…En
gine
s …
Stag
es R
ELEA
SED
- Pr
inte
d do
cum
ents
may
be
obso
lete
; val
idat
e pr
ior t
o us
e.
5
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
NA
SA-S
SC T
est F
acili
ties
–E
Com
plex
Com
pone
nt a
nd E
ngin
e Te
stin
g (E
-1)
Cel
l 3
Cel
l 2
Cel
l 1
•H
igh
Pre
ssur
e (L
ong
Run
) Cap
abili
ties
–LO
X/L
H/R
P ~
8,5
00 p
si–
GN
/GH
~ 1
5,00
0 ps
i–
GH
e ~
10,0
00 p
si•
Sta
te-o
f-the
-Art
DA
C S
yste
ms
•E
-1 C
ell 1
-P
rimar
ily D
esig
ned
for P
ress
ure-
Fed
LOX
/LH
/RP
& H
ybrid
Tes
t Arti
cles
-
Thru
st L
oads
up
to 7
50K
lbf(
horiz
.)•
E-1
Cel
l 2
-D
esig
ned
for L
H T
urbo
pum
p &
P
rebu
rner
Ass
embl
y Te
stin
g-
Thru
st L
oads
up
to 6
0K lb
f
•E
-1 C
ell 3
-D
esig
ned
for L
OX
Tur
bopu
mp,
P
rebu
rner
Ass
embl
y &
Eng
ine
Test
ing
-Th
rust
Loa
ds u
p to
750
K lb
f R
ELEA
SED
- Pr
inte
d do
cum
ents
may
be
obso
lete
; val
idat
e pr
ior t
o us
e.
6A
-1A
-2
TEST
STA
ND
CA
PAB
ILIT
IES:
Th
rust
cap
abili
ty o
f 1.5
M-lb
fFl
ame
Def
lect
or C
oolin
g 22
0,00
0 ga
l/min
Del
uge
Syst
em 7
5,00
0 ga
l/min
Dat
a m
easu
rem
ent s
yste
mTw
o de
rric
ks –
75 to
n an
d 20
0 to
nH
igh-
pres
sure
gas
dis
trib
utio
n sy
stem
sLO
X an
d LH
2 pr
opel
lant
sup
ply
syst
ems
Haz
ardo
us g
as a
nd fi
re d
etec
tion
syst
ems
Bar
ge u
nloa
ding
cap
abili
ty (2
LO
X, 2
LH
)D
iffus
er (A
-2)
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
NA
SA-S
SC T
est F
acili
ties
–A
Com
plex
Full-
scal
e En
gine
Dev
elop
men
t & C
ertif
icat
ion
•S
atur
n V
2nd
Sta
ge J
-2 e
ngin
e (1
.15
M-lb
fclu
ster
of 5
LH
2/LO
X J
-2 e
ngin
es)
•S
SM
E (3
75 K
-lb L
H2/L
OX
) dev
elop
men
t, fli
ght a
ccep
tanc
e, &
65k
ft al
titud
e (A
-2)
•X
-33
Aer
ospi
ke
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
7
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
NA
SA-S
SC T
est F
acili
ties
–B
Com
plex
B-1
B-2
Vehi
cle
Stag
e &
Ful
l-sca
le E
ngin
e Te
stin
g•
SA
TUR
N V
(7.7
M-lb
fclu
ster
of 5
RP
-1/L
OX
F-1
eng
ines
)•
SS
ME
MP
TA (1
.1 M
-lbfc
lust
er o
f 3 L
H2/L
OX
SS
ME
)•
Del
ta IV
Com
mon
Boo
ster
Cor
e (6
50 K
-lbfL
H2/L
OX
RS
-68
engi
ne)
TEST
STA
ND
CA
PAB
ILIT
IES:
Th
rust
cap
abili
ty o
f 13
M-lb
fFl
ame
Def
lect
or C
oolin
g 33
0,00
0 ga
l/min
Del
uge
Syst
em 1
23,0
00 g
al/m
inD
ata
mea
sure
men
t sys
tem
Two
derr
icks
–17
5 to
n an
d 20
0 to
nH
igh-
pres
sure
gas
dis
trib
utio
n sy
stem
sLO
X an
d LH
2 pr
opel
lant
sup
ply
syst
ems
Haz
ardo
us g
as a
nd fi
re d
etec
tion
syst
ems
Bar
ge u
nloa
ding
cap
abili
ty (3
LO
X, 3
LH
)
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
8
•N
AS
A S
tenn
is is
not
a re
sear
ch a
nd d
evel
opm
ent c
ente
r but
ra
ther
the
natio
ns la
rges
t liq
uid
rock
et e
ngin
e te
st fa
cilit
y.
•C
FD c
odes
are
not
dev
elop
ed a
t Ste
nnis
but
rath
er a
pplie
d to
hel
p su
ppor
t the
cur
rent
and
futu
re te
st o
pera
tions
.
•Th
e av
enue
for c
ode
deve
lopm
ent i
s th
roug
h th
e S
BIR
/STT
R p
rogr
am w
ere
we
can
colla
bora
te w
ith s
mal
l bu
sine
sses
and
uni
vers
ities
to d
evel
op th
e TO
OLS
we
need
.
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Rol
e of
Com
puta
tiona
l Mod
elin
g at
NA
SA S
tenn
is
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
9
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
NA
SA-S
SC C
ompu
tatio
n R
esou
rces
NU
ME
RIC
S•F
inite
-Vol
ume
Roe
/TV
D F
lux
Con
stru
ctio
n, V
erte
x St
orag
e
INTE
GR
ATI
ON
•Exp
licit
Four
-Ste
p R
unge
-Kut
ta, I
mpl
icit
GM
RES
, Im
plic
it G
auss
-Sei
del
GR
ID E
LEM
EN
TS
•Tet
rahe
dral
, Hex
ahed
ral,
Pris
mat
ic, P
yram
id
PAR
ALL
EL
PRO
CE
SSIN
G
CA
PAB
ILIT
IES
•Dom
ain
Dec
ompo
sitio
n M
PI, I
ndep
ende
nt G
rids w
ith N
onco
ntig
uous
Inte
rfac
ing,
A
utom
ated
Loa
d B
alan
cing
DYN
AM
IC G
RID
C
APA
BIL
ITIE
S•N
ode
Mov
emen
t Sol
ver (
Impl
icit
Elas
ticity
App
roac
h), A
utom
ated
Em
bedd
ing,
Slid
ing
Inte
rfac
es
GR
ID A
DA
PTIO
N•V
aria
ble
Elem
ent G
rid R
efin
emen
t usi
ng D
elau
nay
Proc
edur
e, A
utom
ated
Loa
d B
alan
cing
of A
dapt
ed G
rid
THE
RM
OC
HE
MIS
TRY
•Mul
ti-co
mpo
nent
Rea
l Gas
Mix
ture
s, Fi
nite
-Rat
e K
inet
ics
TUR
BU
LEN
CE
R
AN
S/LE
S
•k-e
psilo
n /E
ASM
For
mul
atio
ns w
ith C
ompr
essi
bilit
y/V
ortic
alU
pgra
des
•LES
Sub
grid
Scal
e M
odel
s –A
lgeb
raic
and
One
-equ
atio
n•A
lgeb
raic
(Sm
agor
insk
y) a
nd S
ingl
e Eq
uatio
n (k
) SG
S M
odel
s
MU
LTIP
HA
SE F
LOW
•Non
equi
libriu
mPa
rticl
e/D
ropl
et S
olve
rs (E
uler
ian
and
Lagr
angi
anFo
rmul
atio
ns)
•C
RU
NC
H C
FD c
ode
is c
urre
ntly
the
prim
ary
CFD
cod
e us
ed a
t Ste
nnis
.
•D
evel
opm
ent o
f rea
l-flu
ids
(cry
ogen
ics)
, aco
ustic
ally
acc
urat
e ca
vita
tion,
an
d flu
id-s
truct
ure
inte
ract
ion
mod
elin
g ca
pabi
litie
s ha
ve b
een
spon
sore
d by
NA
SA
Ste
nnis
und
er th
e N
AS
A S
BIR
pro
gram
.
•A
dditi
onal
cod
es s
uch
as O
ptim
al S
olut
ions
, Loc
i-Stre
am/C
hem
, CFX
and
A
NS
YS
are
bei
ng a
pplie
d as
wel
l.
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
10
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
NA
SA-S
SC C
ompu
tatio
n R
esou
rces
•Li
nux
Beo
wul
f Dis
kles
s C
lust
er–
48 D
ual C
PU
AM
D O
pter
on24
6 64
-bit
2.0G
Hz
w/ 2
GB
RA
M e
ach
–G
igab
it E
ther
net w
ith 3
Tru
nked
HP
Pro
Cur
ve28
48 S
witc
hes
–R
edH
atC
entO
S4.
3, 2
.6.9
-22.
0.1s
mp
kern
el–
PV
M (p
aral
lel v
irtua
l mac
hine
)&
MP
I (m
essa
ge p
assi
ng in
terfa
ce)m
essa
ge p
assi
ng
•Tw
o H
igh-
End
(64-
bit)
Wor
ksta
tions
–A
MD
Ath
lon
64-b
it 2.
0 G
Hz
(ser
vers
as
clus
ter h
ead
node
)
–D
ual C
PU
AM
D O
pter
on24
4 64
-bit
1.8G
Hz
(ser
ves
as p
rimar
y C
FD w
orks
tatio
n)
•Tw
o 2-
Tera
byte
Net
wor
k A
ttach
ed S
erve
rs w
ith B
acku
p C
ap.
•N
AS
A A
mes
Sup
erco
mpu
ting
Faci
lity
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
11
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
CFD
Mod
elin
g A
pplic
atio
ns
Cry
ogen
ic P
rope
llant
Del
iver
y Sy
stem
s(T
anks
& R
unlin
es)
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
12
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Prop
ella
nt T
ank
Sim
ulat
ions
•Flo
w C
ondi
tions
Ass
esse
d–
2500
lb/s
ec L
OX
Dis
char
ge R
ate
–84
00 p
si T
ank
Pre
ssur
e M
aint
aine
d D
urin
g P
rope
llant
Dis
char
ge
•GN
Con
vect
ive
Mix
ing
with
LO
X
Pro
pella
nt is
Sub
stan
tial
–O
nly
50%
Loa
ded
LOX
is U
seab
le
(<~2
% N
2C
once
ntra
tion)
•LO
X P
rope
llant
Sup
ply
Lim
ited
to
App
roxi
mat
ely
4 se
cond
s(v
s an
Est
imat
ed
10 s
econ
ds D
eter
min
ed U
sing
Nom
inal
Fa
cilit
y P
ress
uriz
ing
Gas
& P
rope
llant
S
uppl
y Li
mits
)
E-1
Test
Fac
ility
Hig
h-Pr
essu
re L
OX
Tank
Dis
char
ge
•C
FD In
vest
igat
ions
Indi
cate
Pre
ssur
izin
g G
as D
iffus
er F
low
Sig
nific
antly
Lim
its
Flow
Dur
atio
n fo
r Hig
h Fl
ow R
ate
Cas
es
HP
LOX
Tank
Pro
pella
nt
Dis
char
ge S
imul
atio
n
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
13
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Prop
ella
nt F
low
line
Sim
ulat
ions
Flow
-Lin
er In
let D
uct a
t E-1
60x6
0 M
esh
Scre
en
Dom
ed P
erfo
rate
d Pl
ate
(Flig
ht S
cree
n) CR
V
Velo
city
Mag
nitu
de
Swirl
Vel
ocity
•U
sed
k-ep
silo
n tu
rbul
ent C
FD a
naly
sis
to
dete
rmin
e flo
w q
ualit
y en
terin
g te
sts
artic
le
(con
cept
ual S
SM
E L
H2
turb
opum
p).
•S
cree
ns a
nd p
orou
s pl
ates
wer
e m
odel
ed
usin
g a
para
met
ric “s
tack
ed-s
pher
ical
bed
”m
odel
–pr
ovid
ed a
sou
rce
term
in m
omen
tum
eq
uatio
n fo
r pre
ssur
e dr
op (m
atch
ed to
ex
perim
enta
l dat
a)
•C
ompl
ex d
uct g
eom
etry
was
foun
d to
cau
se
sign
ifica
nt s
wirl
and
non
-uni
form
ity.
•U
pstre
am s
cree
n w
as o
bser
ved
to a
dver
sely
al
ter t
he e
xit f
low
pro
file
in th
at th
e sw
irlin
g flo
w a
ngle
dev
iatio
n w
as h
ighe
r (~2
deg
.) R
ELEA
SED
- Pr
inte
d do
cum
ents
may
be
obso
lete
; val
idat
e pr
ior t
o us
e.
14
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Prop
ella
nt F
low
line
Sim
ulat
ions
•Te
st P
repa
ratio
n P
roce
dure
:1.
Slow
ly c
hill-
dow
n th
e ru
nlin
ew
alls
to th
e cr
yoge
nic
prop
ella
nt te
mpe
ratu
res
of 3
9o R
(19K
)2.
Pre
-test
ble
ed th
e ru
nlin
eto
flus
h ou
t any
re
mai
ning
hea
ted
fluid
s 3.
Con
duct
test
•P
robl
em E
ncou
nter
ed:
-LH
2ru
nlin
ede
liver
ed a
tran
sien
t war
m s
lug
to te
st a
rticl
e du
ring
initi
al s
tartu
p of
eng
ine
-W
arm
slu
g af
fect
s en
gine
per
form
ance
(T
hrus
t & Is
p)
Pre-
Test
Ble
ed o
f E-1
Liq
uid
Hyd
roge
n R
unlin
e
LH2
inle
t fro
m ta
nk
LH2
outle
t to
test
arti
cle
16-in
ch d
uct
12-in
ch
duct
12-in
ch
duct
•Fu
ndam
enta
l Que
stio
ns:
1.W
hat i
s th
e so
urce
of t
he w
arm
slu
g of
LH
2?
2.C
an th
e w
arm
slu
g be
pre
vent
ed th
roug
h m
odifi
catio
n of
the
test
ing
proc
edur
es o
r do
es it
requ
ire fa
cilit
y m
odifi
catio
ns?
LH2
Mas
s Fl
ow
E-1
Faci
lity
Exit
Tem
pera
ture
81%
PL85
%PL
9
0%PL
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
15
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Prop
ella
nt F
low
line
Sim
ulat
ions
•U
sing
CFD
, eva
luat
ed e
ffici
ency
of t
he p
re-te
st b
leed
(13
lbm
/sec
) in
purg
ing
runl
ine
of w
arm
flui
d.
Out
flow
from
LH
2Ta
nk in
to
the
E-1
Run
line
Pre-
Test
Ble
ed o
f E-1
Liq
uid
Hyd
roge
n R
unlin
e
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
16
Tran
sitio
n to
/from
th
e 16
-inch
/12-
inch
D
iam
eter
Run
lines
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Prop
ella
nt F
low
line
Sim
ulat
ions
Pre-
Test
Ble
ed o
f E-1
Liq
uid
Hyd
roge
n R
unlin
e
•U
sing
CFD
, eva
luat
ed e
ffici
ency
of t
he p
re-te
st b
leed
(13
lbm
/sec
) in
purg
ing
runl
ine
of w
arm
flui
d.
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
17
Pre-
Test
Ble
ed o
f E-1
Liq
uid
Hyd
roge
n R
unlin
e
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Prop
ella
nt F
low
line
Sim
ulat
ions
•C
FD a
naly
sis
show
ed th
at th
e pr
e-te
st b
leed
flow
was
suf
ficie
ntto
flus
h th
e w
arm
LH
2fro
m th
e du
ct.
•R
esid
ual a
mou
nts
of L
H2
rem
aini
ng in
low
-spe
ed re
circ
ulat
ion
regi
ons
wer
e no
t suf
ficie
nt to
cau
se th
e w
arm
-slu
g ob
serv
ed
durin
g th
e te
sts.
•Fu
rther
ana
lysi
s sh
owed
that
the
caus
e of
the
war
m s
lug
was
du
e to
radi
ant h
ead
load
s to
the
vacu
um ja
cket
ed ru
n-lin
es
occu
rrin
g du
ring
the
time
betw
een
the
pre-
test
ble
ed a
nd th
e te
st
star
t (~3
min
utes
).
•R
educ
ed ti
me-
dela
ys b
etw
een
pre-
test
ble
ed a
nd te
st s
tart
redu
ced
the
mas
s an
d te
mpe
ratu
re o
f the
war
m L
H2
slug
. R
ELEA
SED
- Pr
inte
d do
cum
ents
may
be
obso
lete
; val
idat
e pr
ior t
o us
e.
18
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
CFD
Mod
elin
g A
pplic
atio
ns
Prop
ella
nt C
ontr
ol E
lem
ents
(Val
ve D
ynam
ics)
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
19
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Prop
ella
nt C
ontr
ol V
alve
Sim
ulat
ions
Mod
ified
LO
X C
ontr
ol V
alve
2.75
”St
roke
3.25
”St
roke
3.75
”St
roke
Pres
sure
Val
ve B
ody
Flow
Plug
Plug
Val
ve B
ody
Velo
city
&
Stre
amlin
es
•C
FD U
sed
to P
redi
ct th
e Fl
ow F
ield
& C
vC
urve
for a
M
odifi
ed L
OX
Con
trol V
alve
•Y
ield
s a
Goo
d U
nder
stan
ding
of H
ow th
e Fl
ow F
ield
C
hang
es a
s th
e V
alve
Ope
ns &
Affe
cts
Cv
curv
e
•A
naly
sis
Rev
eals
Are
as W
here
Cav
itatio
n M
ay
Occ
ur a
s W
ell a
s A
reas
of H
igh
Vel
ocity
Tha
t Are
Im
porta
nt W
hen
the
Wor
king
Flu
id is
LO
X
LOX
Con
trol
Val
ve C
v: P
redi
cted
and
Exp
erim
enta
l
0
100
200
300
400
500
600
700 0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Valv
e St
roke
(%op
en)
Discharge Coefficient Cv (gal/min/psi^0.5)
Exp
erim
enta
lC
ompu
tatio
nal F
luid
Dyn
amic
s P
redi
ctio
n
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
20
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
CFD
Mod
elin
g A
pplic
atio
ns
Prop
ella
nt F
low
Mea
sure
men
t Dev
ices
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
21
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Flow
Mea
sure
men
t Dev
ice
Opt
imiz
atio
n -R
TD•
The
prim
ary
purp
ose
of th
is e
ffort
was
to a
sses
s O
ptim
al S
olut
ion’
s S
culp
tor s
oftw
are
in p
erfo
rmin
g:
1.M
anua
l sha
pe d
efor
mat
ion
with
out t
he n
eed
for C
FD g
rid re
gene
ratio
n.
2.P
erfo
rm C
FD-b
ased
opt
imiz
atio
nfo
r a re
leva
nt N
AS
A S
tenn
is c
ase.
•R
TD(re
sist
ance
tem
pera
ture
det
ecto
r) pr
obe
was
sel
ecte
d as
the
prim
ary
test
cas
e du
e to
thei
r pre
mat
ure
stru
ctur
al fa
ilure
s on
the
LOX
&
LH
2 pr
opel
lant
feed
-line
s of
the
NA
SA
Ste
nnis
E1
test
faci
lity.
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
22
•SE
M a
naly
sis
of th
e fa
iled
RTD
sby
W. J
orda
n of
Lou
isia
na T
ech
reve
aled
sev
eral
pos
sibl
e ca
uses
of f
ailu
re in
the
low
tem
pera
ture
en
viro
nmen
t:
•Th
e m
ajor
fact
ors
are
belie
ved
to b
e th
e du
ctile
tens
ile o
verlo
adin
g an
d re
vers
ed b
endi
ng d
ue to
dra
g on
the
RTD
.
Duc
tile
tens
ile o
verlo
ad c
lose
to th
e yi
eld
stre
ngth
Fatig
ue fa
ilure
due
to v
ibra
tion
in th
e sy
stem
(n
ot te
st c
ycle
s)
Rev
erse
d be
ndin
g re
sulti
ng in
cra
ckin
g at
ba
se o
f pro
bes
on o
ppos
ite s
ides
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
RTD
Opt
imiz
atio
n -B
ackg
roun
d
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
23
•Th
e du
ctile
tens
ile o
verlo
ads
are
attri
bute
d to
exc
essi
ve d
rag
on th
e R
TDs.
Sol
utio
n:O
ptim
ize
RTD
geo
met
ry b
y m
inim
izin
g flo
w-in
duce
d dr
ag
•R
ever
sed
bend
ing
and
vibr
atio
n fa
ilure
s co
uld
be a
ttrib
uted
to
unst
eady
vor
tex
shed
ding
bei
ng c
oupl
ed w
ith th
e na
tura
l fre
quen
cy o
f the
RTD
s.
Sol
utio
n:O
ptim
ize
RTD
geo
met
ry to
alte
r vor
tex
shed
ding
beh
avio
r
•Th
e re
vers
ed b
endi
ng c
ould
als
o be
a re
sult
of p
erio
dic
open
ing/
clos
ing
of fa
cilit
y va
lves
.
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
RTD
Opt
imiz
atio
n -B
ackg
roun
d
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
24
•B
ase
case
RTD
geo
met
ry is
a c
ircul
ar c
ylin
der m
ount
ed in
side
the
SS
C E
1 te
st fa
cilit
y’s
LOX
pro
pella
nt fe
edlin
e.
•E
1 LO
xte
st c
ondi
tions
con
duci
ve fo
r the
phe
nom
enon
of
“lock
-in”
flow
-indu
ced
vibr
atio
ns(f s
with
in +
/-30
% o
f fn)
.
u=20
.4 ft
/sec
Re R
TD=3
.14e
5 &
Re p
ipe=
7.64
e6
St=
0.2=
f s*D
/u
RTD
Geo
met
ry:
D=0
.34
inL=
3.25
in
Pip
e G
eom
etry
:
D=8
.3 in
NIS
T LO
X C
ondi
tions
:
ρ=71
.362
lbm
/ft3
T=20
0Rμ=
1.32
e-4
lbm
/ft-s
ec
f s=1
43 H
z w
ithin
18%
of f
n=17
5 H
z
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
RTD
Opt
imiz
atio
n –
Bas
e C
ase
Con
figur
atio
n
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
25
•S
culp
tor’s
arb
itrar
y sh
ape
defo
rmat
ion
(AS
D) t
ools
wer
e us
ed
to m
anua
lly d
efor
m b
ase
case
RTD
into
3 te
st g
eom
etrie
s w
ithou
t the
nee
d fo
r re-
grid
ding
:
1.R
ound
ed R
ecta
ngul
ar C
ylin
der
2.Fo
rwar
d Fa
cing
Tea
rdro
p
3.R
earw
ard
Faci
ng T
eard
rop
•S
tead
y-st
ate
sim
ulat
ions
wer
e pe
rform
ed fo
r eac
h de
sign
ch
ange
and
the
Z-m
omen
t on
the
RTD
was
mon
itore
d.
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
RTD
Opt
imiz
atio
n –
Man
ual S
hape
Def
orm
atio
ns
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
26
-0.20.0
0.2
0.4
0.6
0.8
020
040
060
080
010
00Ite
ratio
n #
Z-Moment
Rou
nded
Squ
are
Cyl
inde
r
Rev
erse
d Te
ardr
op
Forw
ard
Tear
drop
•R
esul
ts w
ere
in a
gree
men
t with
phy
sica
l exp
ecta
tions
.
•33
% re
duct
ion
in th
e Z-
mom
ent w
as o
btai
ned
with
the
forw
ard
faci
ng te
ardr
op (p
seud
o-ai
rfoil)
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
RTD
Opt
imiz
atio
n –
Man
ual S
hape
Def
orm
atio
ns
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
27
Bas
e C
ase
Mz=
0.41
6R
ever
sed
Tear
drop
Mz=
0.34
2
Forw
ard
Tear
drop
Mz=
0.26
9
Rou
nded
Rec
tang
le
Mz=
0.48
0R
TD Z
-mom
ents
ar
e pr
opor
tiona
l to
the
size
of t
he
wak
e re
gion
es
peci
ally
nea
r th
e tip
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
RTD
Opt
imiz
atio
n –
Man
ual S
hape
Def
orm
atio
ns
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
28
•S
culp
tor s
ucce
ssfu
lly re
ache
d a
stea
dy-s
tate
opt
imum
RTD
geo
met
ry
0
0.050.1
0.150.2
0.250.3
0.350.4
0.45
02
46
810
1214
Opt
imiz
er C
alls
Non-Dimensional Z-Moment
-0.4
-0.20.0
0.2
0.4
0.6
0.8
020
040
060
080
010
00Ite
ratio
n #
Non-Dimensional Z-Moment
Rou
nded
Squ
are
Cyl
inde
rR
ever
sed
Tear
drop
Forw
ard
Tear
drop
Opt
imiz
ed
64%
redu
ctio
nin
ste
ady-
stat
e Z-
Mom
ent
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
RTD
Opt
imiz
atio
n –
Impl
emen
tatio
n of
Gra
dien
t-Bas
ed O
ptim
izer
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
29
•S
tead
y-st
ate
optim
ized
RTD
pro
duce
d a
smal
ler a
nd m
ore
sym
met
rical
w
ake
givi
ng a
low
er d
rag
coef
ficie
nt.
•Fu
rther
ana
lysi
s (a
ngle
of a
ttack
, sw
irl, e
tc.)
wou
ld n
eed
to b
eco
nduc
ted
befo
re a
ny re
com
men
datio
n ca
n be
mad
e fo
r mod
ifyin
g th
e R
TD.
Opt
imiz
ed G
eom
etry
Mz=
0.41
6M
z=0.
149
Bas
e C
ase
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
RTD
Opt
imiz
atio
n –
Impl
emen
tatio
n of
Gra
dien
t-Bas
ed O
ptim
izer
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
30
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
CFD
Mod
elin
g A
pplic
atio
ns
Roc
ket P
lum
e M
odel
ing
(Hyd
roca
rbon
Plu
mes
and
Sta
ge T
estin
g)
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
31
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Met
hane
Tec
hnol
ogy
Test
bed
Prog
ram
(MTT
P) P
lum
e Si
mul
atio
ns
•D
evel
op re
liabl
e C
FD m
etho
dolo
gies
for m
odel
ing
HC
plu
mes
•P
rovi
de s
uppo
rt fo
r plu
me
diag
nost
ic e
fforts
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
32
α
L/D
=20
α
r /D=1
2
Inle
t Bou
ndar
y
Free
strea
m B
ound
ary
Exit
Boun
dary
Sym
met
ry B
ound
ary
Ant
icip
ated
Plu
me B
ound
ary
(α
=hal
f ang
le sp
read
ing
rate
~ 5
-6 d
egre
es)
Noz
zle B
ound
ary
r/D=1
0
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
MTT
P Pl
ume
Sim
ulat
ions
–C
FD D
omai
n D
efin
ition
Ope
ratin
g C
ondi
tions
Pc=
150
psia
O/F
=2.0
(Phi
~ 2
.0)
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
33
•Im
plem
ente
d fin
er fi
delit
y in
to th
e C
FD m
odel
at a
n in
crem
enta
l lev
el
dem
onst
rate
d th
e im
pact
of t
he m
odel
ing
assu
mpt
ions
.
Invi
scid
/Idea
l Gas
Tu
rbul
ent/I
deal
Gas
Tu
rbul
ent/R
eal G
as
•S
hock
loca
tions
and
axia
l dec
ay in
gas
pro
perti
esw
ere
impa
cted
by
both
turb
ulen
ce (k
-eps
ilon
mod
el) a
nd re
al-g
as (1
3-sp
ecie
s) e
ffect
s.
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
MTT
P Pl
ume
Sim
ulat
ions
–C
FD M
odel
Fid
elity M
olec
ular
&
Turb
ulen
t Diff
usio
n E
ffect
s
Rea
l Gas
Effe
cts
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
34
•R
eal-g
as tu
rbul
ent r
eact
ing
mod
elpr
edic
ted
corr
ectly
–S
hock
-cel
l loc
atio
ns a
nd s
izes
–
App
roxi
mat
e je
t spr
eadi
ng ra
tes
–O
bser
ved
nozz
le fl
ow s
epar
atio
n
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
MTT
P Pl
ume
Sim
ulat
ions
–C
FD M
odel
Val
idat
ion
Sepa
ratio
n B
ubbl
e
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
35
•C
FD d
ata
was
use
d to
sup
port
para
llel e
fforts
in th
e ex
perim
enta
l plu
me
diag
nost
ics
and
line-
by-li
ne s
pect
ral r
adia
tion
anal
ysis
.
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
MTT
P Pl
ume
Sim
ulat
ions
–C
FD M
odel
Val
idat
ion
12 10 8 6 4 2 0
Spectral Radiance (µWatts/sr cm2 nm)
550
500
450
400
350
Wav
elen
gth
(nm
) Tes
t_18
d P
C =
140
.500
O/F
= 1
.627
Tes
t_21
c P
C =
145
.709
O/F
= 1
.887
Var
iatio
n in
O/F
Rat
ioC
ham
ber P
ress
ure
Con
stan
tO
H (0
,0)
Ban
d
CH
390
0 Å
Ban
d
CH
430
0 Å
Ban
d
C2
Sw
anB
and
C2
Sw
anB
and
C2
Sw
anB
and
Expe
rimen
tal V
aria
tion
in S
pect
ral
Emis
sion
s w
ith O
/F R
atio
Cou
rtesy
of G
opal
Tejw
ani
NA
SA S
SC
Cou
rtesy
of L
este
r Lan
gfor
d N
ASA
SS
C
Line
-by-
Line
Hyd
roca
rbon
Sp
ectr
al C
alcu
latio
ns
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
36
•Tw
o ne
w tr
ansp
ort v
ehic
les
(AR
ES V
and
I) h
ave
been
pro
pose
d to
su
ppor
t exp
lora
tion
effo
rts u
nder
the
new
ly d
efin
ed C
onst
ella
tion
Pro
gram
.
•N
AS
A S
tenn
is w
ill p
lay
an im
porta
nt ro
le in
the
test
ing
and
certi
ficat
ion
of
the
AR
ES
prim
ary
pow
er-p
lant
s (R
S-68
and
J-2
X).
J-2X
Alti
tude
Diff
user
Sim
ulat
ion
(300
K-lb
f)
AR
ES I
RS-
68 T
est @
B-1
(650
K-lb
f)
AR
ES V
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
-B
ackg
roun
d
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
37
•In
pre
para
tion
for t
he
Con
stel
latio
n pr
ogra
m,
prop
osal
s fo
r NA
SA
Ste
nnis
to
cond
uct A
RE
S V
& I
stag
e te
sts
wer
e m
ade.
•D
ue to
test
sch
edul
es a
nd
load
ing/
unlo
adin
g is
sues
of t
he
vehi
cle
stag
es, t
he fe
asib
ility
of
cond
uctin
g A
RES
V s
tage
test
s w
ith th
e A
RES
I st
age
pres
ent
on th
e B
-2 te
st s
tand
was
br
ough
t int
o qu
estio
n.SA
TUR
N V
Stag
e Te
st a
t NA
SA S
tenn
is
B-2
Tes
t Sta
nd(5
LO
x/R
P-1
F-1
Engi
nes
–7.
76 M
-lbf)
AR
ES
V –
3.25
M-lb
fLO
x/H
2A
RE
S I
–0.
30 M
-lbfL
Ox/
H2
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
-B
ackg
roun
d
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
38
•Fo
rwar
d al
ignm
ent o
f the
co
ncep
tual
AR
ES V
coul
d ca
use:
1.U
ndes
irabl
e pl
ume
defle
ctio
n
2.E
xces
sive
plu
me
heat
ing
(def
lect
or &
asp
irato
r)
3.A
cous
tic/v
ibra
tiona
l dam
age
to
test
arti
cles
•A
ft al
ignm
ent o
f the
co
ncep
tual
AR
ES I
coul
d ca
use:
1.E
xces
sive
def
lect
or h
eatin
g du
e to
redu
ced
nozz
le/d
efle
ctor
se
para
tion
dist
ance
AR
ES V
AR
ES
I
No
CFD
mod
el o
f the
B-2
test
sta
nd e
xist
ed th
at w
ould
ena
ble
us to
ana
lyze
an
d ad
dres
s so
me
of th
ese
issu
es.
PR
O-E
CA
D M
odel
of t
heP
ropo
sed
Test
Con
figur
atio
n
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–Po
tent
ial I
ssue
s
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
39
•4.
3 m
illio
n un
stru
ctur
ed g
rid c
ells
(par
titio
ned
to ru
n on
90
CP
Us)
•Id
eal-g
as, c
hem
ical
ly fr
ozen
flow
•D
ry-p
lum
eC
FD m
odel
ing
of tw
o-ph
ase
defle
ctor
wat
er c
oolin
g th
roug
h th
ousa
nds
of ~
1/8”
diam
eter
hol
es o
n th
is s
cale
is c
urre
ntly
not
feas
ible
Grid
requ
irem
ents
to re
solv
e flo
w is
bey
ond
curr
ent t
echn
olog
y
Two-
phas
e ph
ysic
s ar
e be
ing
inco
rpor
ated
in fu
ture
ver
sion
of t
he
CR
UN
CH
cod
e un
der a
cur
rent
SB
IR c
ontra
ct w
ith C
RA
FT-T
ech
that
will
en
able
app
roxi
mat
e m
odel
ing
of th
e co
olin
g flo
w.
Bas
ic s
truct
ure
of w
et-p
lum
e w
ill b
e si
mila
r to
the
dry-
plum
e
CFD
dry
-plu
me
data
can
be
used
to g
uide
eng
inee
ring
leve
l ca
lcul
atio
ns (c
orre
latio
ns/e
xper
ienc
e) fo
r fut
ure
cool
ing
mod
ifica
tions
.
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–C
FD M
etho
dolo
gy
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
40
•Te
st a
rticl
e, s
tand
, and
gro
und
cont
oure
d by
Tem
pera
ture
•
Iso-
ther
mal
sur
face
@ 1
000
K c
olor
ed b
y V
eloc
ity•
Eng
ine
stre
amlin
es (r
ed)
•Pl
ume
entra
inm
ent s
tream
lines
(whi
te)
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–R
esul
ts
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
41
•Ti
me-
aver
aged
plu
me
cros
s-se
ctio
n te
mpe
ratu
re c
onto
urs
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–R
esul
ts
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
42
•Ti
me-
aver
aged
un-
cool
ed w
all s
urfa
ce te
mpe
ratu
res
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–R
esul
ts
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
43
•Ti
me-
aver
aged
un-
cool
ed w
all s
urfa
ce p
ress
ures
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–R
esul
ts
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
44
•Ti
me-
aver
aged
un-
cool
ed w
all s
urfa
ce p
ress
ures
& s
hock
sur
face
s
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–R
esul
ts
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
45
•Ti
me-
aver
aged
cen
terli
ne (x
-slic
e) c
onto
urs
RS-
68 T
est @
B-1
(660
K-lb
f)
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–R
esul
ts
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
46
•Ti
me-
aver
aged
off-
cent
er (x
-slic
e) c
onto
urs
RS-
68 T
est @
B-1
(660
K-lb
f)
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–R
esul
ts
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
47
Cap
abili
ties/
Com
pete
ncy:
•P
rovi
ded
the
uniq
ue c
apab
ility
of m
odel
ing
and
anal
yzin
g th
e B
-2
test
sta
nd fl
ow-fi
eld
at fu
ll-sc
ale.
•P
rovi
ded
the
expe
rienc
e ba
sefo
r fut
ure
CFD
plu
me
mod
elin
g of
N
AS
A S
tenn
is te
st s
tand
s.
Lear
ning
s/In
sigh
t:
1.P
rovi
ded
a ph
ysic
al u
nder
stan
ding
of th
e A
RE
S V
plu
me
dyna
mic
s an
d its
impi
ngem
ent c
hara
cter
istic
s in
term
s of
pla
cem
ent o
n th
ede
flect
or, s
ize
and
shap
e, a
nd u
n-co
oled
tem
pera
ture
s/pr
essu
res.
This
will
pro
ve to
ser
ve a
s a
valu
able
gui
de fo
r fut
ure
engi
neer
ing
calc
ulat
ions
& a
cous
tic/v
ibra
tiona
l stu
dies
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–Va
lue
Add
ed
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
48
Cap
abili
ties/
Com
pete
ncy:
•P
rovi
ded
the
uniq
ue c
apab
ility
of m
odel
ing
and
anal
yzin
g th
e B
-2
test
sta
nd fl
ow-fi
eld
at fu
ll-sc
ale.
•P
rovi
ded
the
expe
rienc
e ba
sefo
r fut
ure
CFD
plu
me
mod
elin
g of
N
AS
A S
tenn
is te
st s
tand
s.
Lear
ning
s/In
sigh
t:
1.P
rovi
ded
a ph
ysic
al u
nder
stan
ding
of th
e A
RE
S V
plu
me
dyna
mic
s an
d its
impi
ngem
ent c
hara
cter
istic
s in
term
s of
pla
cem
ent o
n th
ede
flect
or, s
ize
and
shap
e, a
nd u
n-co
oled
tem
pera
ture
s/pr
essu
res.
This
will
pro
ve to
ser
ve a
s a
valu
able
gui
de fo
r fut
ure
engi
neer
ing
calc
ulat
ions
& a
cous
tic/v
ibra
tiona
l stu
dies
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
cept
ual A
RES
Sta
ge T
ests
–Va
lue
Add
ed
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
49
NA
SA-S
SC C
FD M
odel
ing
Act
iviti
es
Con
clud
ing
Rem
arks
•N
AS
A S
tenn
is S
pace
Cen
ter i
s th
e na
tion’
s le
ad fa
cilit
y fo
r fu
ll-sc
ale
liqui
d ro
cket
eng
ine
test
ing.
•Te
stin
g at
the
com
pone
nt, e
ngin
e an
d st
age
leve
ls a
re
esse
ntia
l for
mai
ntai
ning
cur
rent
spa
ce fl
ight
cap
abili
ties
and
redu
cing
the
asso
ciat
ed ri
sks.
•C
ompu
tatio
nal m
odel
ing
supp
ort o
f the
test
ope
ratio
ns a
t S
tenn
is is
con
tinua
lly g
row
ing
in d
eman
d.
•Th
e S
tenn
is m
odel
ing
com
mun
ity is
con
stan
tly lo
okin
g to
ap
ply
new
val
idat
ed te
chno
logi
es in
the
day-
to-d
ay w
orki
ng
envi
ronm
ent.
REL
EASE
D -
Prin
ted
docu
men
ts m
ay b
e ob
sole
te; v
alid
ate
prio
r to
use.
