7/21/2019 Converging diverging nozzle

1/6

CDF 0 VlpkrtUmovdn Udjhdy Wdjbml`l

6946NL49765

Wl`jls`dy grkup

Don

Pk aoj` tml prlssurl `ostrofutokj oj d ekjvlrgojg `ovlrgojg jkzzcl usojg Ndtcdf akr vdrokus fdeb

prlssurls.

Dcgkrotmn

Aorst wl jll` tk emleb oa tml tmrkdt os emkbl` kr jkt. Oj edsl tml tmrkdt os jkt emkbl`, tml ackw

oj tml wmkcl jkzzcl os sufskjoe. Kjel tml tmrkdt os emkbl`, tml ackw oj tml ekjvlrgojg pdrt ossufskjoe dj` klsjt emdjgl akr lerldsl oj fdeb prlssurl, fut tml oj tml `ovlrgojg sletokj tml

ackw ekuc` lotmlr fl osljtrkpoe kr tmlrl ekuc` fl d smkeb.

Pk emleb oa tml tmrkdt os emkbl`, wl aoj` tml ndxonun fdeb prlssurl dt wmoem tml tmrkdt

emkbls (clts edcc ot pe)usojg tml rlcdtokj fltwllj prlssurl dj` D/Ds.

> 6 4

.+ .+

6

4

4

4

Wmlrl D, Ds, pk dj` p drl drld ka jkzzcl, skjoe drld, ojclt stdgjdtokj prlssurl dj` prlssurl dt

drld D rlspletovlcy. Pk aoj` tml pe, wl sufstotutl D, Ds dj` pk wotm lxot drld, tmrkdt drld dj`

ojclt stdgjdtokj prlssurl rlspletovlcy.

Jkw, oa govlj fdeb prlssurl os nkrl tmdj pe tmlj tml ackw oj tml wmkcl jkzzcl os sufskjoe. Pml

prlssurl `ostrofutokj edj fl akuj` usojg lqudtokj 4 ds wl mdvl tml glknltry ka jkzzcl, ojclt

stdgjdtokj prlssurl dj` D* edj fl akuj` usojg tml sdnl lqudtokj.

Oa tml fdeb prlssurl os clss tmdj pe, tmlj aorst wl jll` tk emleb oa tml smkeb os prlsljt oj tml

`ovlrgojg sletokj ka jkzzcl.

Aorst wl aoj` tml ndem jk. dt tml lxot usojg

> 4 4 4 4 6 4 6 4+

6

Arkn lxot ndem jk. wl aoj` stdgjdtokj prlssurl datlr smkeb (pk6) usojg akcckwojg rlcdtokj

7/21/2019 Converging diverging nozzle

2/6

>4 46 5

Oj tmos lqudtokj, wl mdvl lxot prlssurl (pf) dj` lxot ndem jk. (Nl), sk wl edj aoj` pk6.

Jkw wl edj aoj` ndem jk. hust flakrl tml smkeb (N4) usojg lqudtokj 5 dj` akcckwojg lqudtokjs.64 > 4 6 4 4 4 06 > 4 44/6 4 4/6 49.644.04 9.6

4.004

.

1

Datlr wl glt tml ndem jk. hust flakrl tml smkeb (N4), wl edj aoj` tml drld dt wmoem tmdt ndem

jk. keeurs usojg drldndem jk. rlcdtokjsmop.

> 4 R 6 4 4 46 ^/+!/ 7

Kjel wl mdvl tml drld, wl glt tml pksotokj ka tml smkeb. Oa tml pksotokj ka tml smkeb os ojso`l

tml jkzzcl, tml smkeb lxosts lcsl tml ackw os auccy osljtrkpoe.

Grdpms-

Aogurl 4 Uufskjoe Ackw

7/21/2019 Converging diverging nozzle

3/6

Aogurl 5 Qdrodtokj ka pksotokj ka smkeb wotm fdeb prlssurl

Aogurl 6 Auccy osljtrkpoe ackw

7/21/2019 Converging diverging nozzle

4/6

Ek`l

aujetokjY > prlssurl(x)%Govlj ekj`otokjsp9 > 42 %ojclt stdgjdtokj prlssurlpf > x2 %fdeb prlssurlg>4.02 % vdcul ka gdnnd akr dor%aorst wl emleb oa tml ekj`otokjs drl oj tml jkzzcl drl sufskjoe kr

suplrskjoe

%wl aoj` tml ndxonun fdeb prlssurl dt wmoem jkzzcl emkblspe > askcvl (I(x) - drld(4)/drld(9.5) + ((6/(g+4)).Z(9.42% jkw wl ndbl d ckkp tk aocc tml 'pr[`ost' drrdy wotm tml prlssurl

vdculswmoclj34.942

% skcvojg akr prlssurl usojg tml drld prlssurl rlcdtokjpr[`ost(n) > askcvl (I(x) - drld(j)/Ds +

((6/(g+4)).Z(9.j+9.942

lj`pckt (c,pr[`ost)2

Aogurl 5 Auccy osljtrkpoe suplrskjoe ackw

Aogurl 0 Ndss ackw rdtl v/s Fdeb prlssurl

7/21/2019 Converging diverging nozzle

5/6

% tk aoj` tml ndss ackw rdtl wl jll` tml ndem jk. dt tmrkdtndem > askcvl(I(x) -drld(9.5)/Ds + 4/x*(6/(g+4)*(4+(g-

4)/6*xZ6))Z(9. drld(9.5)2pr[`ost > zlrks(4,494)2% drrdy tk pckt prlssurl `ostrofutokjc>989.94842 % drrdy akr cljgtmj>92 n>42%aoj` ndem jk. dt tml lxot oa smkeb keeursnls>askcvl(I(x) -xZ6 - (g-4)Z(-4) + ((g-4)Z(-6)+(6 /(g-

4))*(6/(g+4))Z((g+4)/(g-4))*((p9*drld(9.5))/(pf*drld(4)))Z6)Z9.askcvl(I(x) -x/pf + (4+((g-4)/6)*nlsZ6)Z(g/(g-4)),9.4)2

%stdgjdtokj prlssurl datlr smkeb%ndem jk. hust flakrl smkebn4>askcvl(I(x) -p9/p96*(4+4.417*(xZ6-4))+((4+9.6*xZ6)*(4.0*xZ6-

9.6)/(4.00*xZ6))Z5. askcvl(I(x) -x/drld(9.5) + 4/n4*(6/(g+4)*(4+(g-4)/6*n4Z6))Z(9. askcvl(I(x) drld(x)-d4,4)2oasmkeb[pkso34 % smkeb os prlsljt oj tml jkzzcl (prdetoedc skcutokj

akr pksotokj ka smkeb)% wl aoj` vdcul ka d* akr ackw datlr smkebDs4 > askcvl (I(x) -drld(4)/x+(6/(g+4)).Z(9.

7/21/2019 Converging diverging nozzle

6/6

pr[`ost(n) > askcvl (I(x) - drld(j)/Ds +((6/(g+4)).Z(9. 42Y > ndss

lj`lj`

aujetokjRd^ > drld(x) % aujetokj akr drldoax3> 9.5

d>46*(x-9.5)Z6 + 42lcsl

d>6*(x-9.5)Z6 + 42lj`

lj`