implementation of active flow control using microjets on an rc aircraft
DESCRIPTION
Implementation of Active Flow Control using Microjets on an RC Aircraft. Dan Drake Phil Kreth Hussein Nabulsi Matt Tubtim Faculty Advisor: Dr. Farrukh Alvi Sponsor: Dr. Gregg Abate (Eglin AFB). Background. Flow separated ~16° AOA. Reattached flow ~ 5 psig @ microjets. Flow Separation. - PowerPoint PPT PresentationTRANSCRIPT
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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
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BackgroundBackgroundFlow Separation
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Flow separated ~16° AOA Reattached flow ~ 5 psig @ microjets
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MotivationMotivation
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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
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-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
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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
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Wind Tunnel TestingWind Tunnel Testing
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Paint Testing◦ Uncertainty in interpretation
Smoke Wire◦ Minimum WT speed too high
Tuft Testing◦ Success
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Flow Reattachment VideoFlow Reattachment Video
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Air Supply Method
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Air Supply Method
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Performance Measurements
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Final Design Schematic
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Actual Design
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Final Design ComponentsFinal Design ComponentsOverhead View
Close-up view:
Tank
Regulator
Valves
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High Pressure Tank Location
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Shielding for High Pressure Cylinder
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Pressure Manifolds and Microjets in Wing
to microjets
from valves04.03.2008
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Added Weight: 10 lbsTotal Weight: 14 lbs
Budget & WeightBudget & Weight
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Test PlanTest PlanVideo aircraft on ground
◦Show all systems in working orderFlight testing, no controlFlight testing, with control
◦Acquire video from on-board camera
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Flight Test GoalsFlight Test GoalsDon’t crash!Demonstrate reattachment
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Flight Test VideoFlight Test Video
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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
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Special ThanksSpecial ThanksEglin Air Force Base
◦ Dr. Gregg AbateAAPL – FAMU-FSU
◦ Dr. Farrukh AlviMechanical Engineering Dept
◦ Dr. Cesar Luongo◦ Mr. Jon Cloos
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Questions and CommentsQuestions and Comments
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