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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.

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implementation of active flow control using microjets on an rc aircraft

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
Background

Flow separated ~16° AOA

Reattached flow ~ 5 psig @ microjets

Flow Separation

04.03.2008

motivation
Motivation
  • ONERA D Airfoil
  • Span = 1 m, Chord = 0.35
  • U= 45 m/s,  = 14
  • Control applied to 40% of span

Flow with Control

Baseline flow

*Conducted at the Université de Poitiers, France

Images & Video Courtesy of Dr. Farrukh Alvi

04.03.2008

motivation1
Motivation

20-30% gain in CL

Control applied to 40% of span

Images Courtesy of Dr. Farrukh Alvi

04.03.2008

needs assessment
Needs Assessment

Implement microjets on RC Airplane

Remotely activate each wing

Run time should be 30 secs or more

Delay stall and improve lift

Use off-the-shelf items only

Budget = $1,50000

04.03.2008

wind tunnel testing
Wind Tunnel Testing

04.03.2008

  • Paint Testing
    • Uncertainty in interpretation
  • Smoke Wire
    • Minimum WT speed too high
  • Tuft Testing
    • Success
actual design
Actual Design

04.03.2008

final design components
Final Design Components

Overhead View

Close-up view:

Tank

Regulator

Valves

04.03.2008

slide16
Pressure Manifolds and Microjets in Wing

to microjets

from valves

04.03.2008

budget weight
Budget & Weight

Added Weight: 10 lbs

Total Weight: 14 lbs

04.03.2008

test plan
Test Plan
  • Video aircraft on ground
    • Show all systems in working order
  • Flight testing, no control
  • Flight testing, with control
    • Acquire video from on-board camera

04.03.2008

flight test goals
Flight Test Goals

Don’t crash!

Demonstrate reattachment

04.03.2008

outcomes conclusions
Outcomes & Conclusions
  • System 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 thanks
Special Thanks
  • Eglin Air Force Base
    • Dr. Gregg Abate
  • AAPL – FAMU-FSU
    • Dr. Farrukh Alvi
  • Mechanical Engineering Dept
    • Dr. Cesar Luongo
    • Mr. Jon Cloos

04.03.2008

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