Implementation of Active Flow Control using Microjets on an RC Aircraft Dan Drake Phil Kreth Hussein...
23
Implementation of Active Implementation of Active Flow Control using Flow Control using Microjets on an RC Microjets on an RC Aircraft Aircraft Dan Drake Phil Kreth Hussein Nabulsi Matt Tubtim Faculty Advisor: Dr. Farrukh Alvi Sponsor: Dr. Gregg Abate (Eglin AFB) 04.03.2008
-
Upload
clyde-watson -
Category
Documents
-
view
214 -
download
0
Transcript of Implementation of Active Flow Control using Microjets on an RC Aircraft Dan Drake Phil Kreth Hussein...
Implementation of Active Implementation of Active Flow Control using Microjets Flow Control using Microjets on an RC Aircrafton an RC Aircraft
Dan DrakePhil KrethHussein NabulsiMatt Tubtim
Faculty Advisor: Dr. Farrukh AlviSponsor: Dr. Gregg Abate (Eglin AFB)
04.03.2008
BackgroundBackgroundFlow Separation
04.03.2008
Flow separated ~16° AOA Reattached flow ~ 5 psig @ microjets
MotivationMotivation
04.03.2008
Baseline flow
• ONERA D Airfoil• Span = 1 m, Chord = 0.35• U= 45 m/s, = 14 • Control applied to 40% of span
Flow with Control
*Conducted at the Université de Poitiers, France
Images & Video Courtesy of Dr. Farrukh Alvi
0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
-5 0 5 10 15 20 25 (°)
CL Unforced FlowMicrojets Pressure 0.3 barMicrojets Pressure 1.1 barMicrojets Pressure 1.5 bar
MotivationMotivation
04.03.2008
Images Courtesy of Dr. Farrukh Alvi
20-30% gain in CL
Control applied to 40% of span
Needs AssessmentNeeds AssessmentImplement microjets on RC AirplaneRemotely activate each wingRun time should be 30 secs or moreDelay stall and improve liftUse off-the-shelf items onlyBudget = $1,50000
04.03.2008
Wind Tunnel TestingWind Tunnel Testing
04.03.2008
Paint Testing◦ Uncertainty in interpretation
Smoke Wire◦ Minimum WT speed too high
Tuft Testing◦ Success
Flow Reattachment VideoFlow Reattachment Video
04.03.2008
Air Supply Method
Air Supply Method
Performance Measurements
Final Design Schematic
04.03.2008
Actual Design
04.03.2008
Final Design ComponentsFinal Design ComponentsOverhead View
Close-up view:
Tank
Regulator
Valves
04.03.2008
High Pressure Tank Location
04.03.2008
Shielding for High Pressure Cylinder
04.03.2008
Pressure Manifolds and Microjets in Wing
to microjets
from valves04.03.2008
Added Weight: 10 lbsTotal Weight: 14 lbs
Budget & WeightBudget & Weight
04.03.2008
Test PlanTest PlanVideo aircraft on ground
◦Show all systems in working orderFlight testing, no controlFlight testing, with control
◦Acquire video from on-board camera
04.03.2008
Flight Test GoalsFlight Test GoalsDon’t crash!Demonstrate reattachment
04.03.2008
Flight Test VideoFlight Test Video
04.03.2008
Outcomes & ConclusionsOutcomes & ConclusionsSystem was successful
◦ No “bad landings”◦ Microjets remotely activated◦ Reattached flow demonstrated
Proposed Future Work◦ Demonstrate Roll Control◦ Measure CL and CD improvements
04.03.2008
Special ThanksSpecial ThanksEglin Air Force Base
◦ Dr. Gregg AbateAAPL – FAMU-FSU
◦ Dr. Farrukh AlviMechanical Engineering Dept
◦ Dr. Cesar Luongo◦ Mr. Jon Cloos
04.03.2008
Questions and CommentsQuestions and Comments
04.03.2008
