Prediction of Unsteady Aerodynamics and Control of Delta Wings with Tangential Leading Edge Blowing

Prediction of Unsteady Aerodynamics and Control of Delta Wings with Tangential Leading Edge Blowing
Title Prediction of Unsteady Aerodynamics and Control of Delta Wings with Tangential Leading Edge Blowing PDF eBook
Author Stanford University. Department of Aeronautics and Astronautics
Publisher
Pages 396
Release 1989
Genre
ISBN

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Controlled Vortical Flow on Delta Wings Through Unsteady Leading Edge Blowing

Controlled Vortical Flow on Delta Wings Through Unsteady Leading Edge Blowing
Title Controlled Vortical Flow on Delta Wings Through Unsteady Leading Edge Blowing PDF eBook
Author National Aeronautics and Space Adm Nasa
Publisher
Pages 162
Release 2018-11-18
Genre
ISBN 9781731351593

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The vortical flow over a delta wing contributes an important part of the lift - the so called nonlinear lift. Controlling this vortical flow with its favorable influence would enhance aircraft maneuverability at high angle of attack. Several previous studies have shown that control of the vortical flow field is possible through the use of blowing jets. The present experimental research studies vortical flow control by applying a new blowing scheme to the rounded leading edge of a delta wing; this blowing scheme is called Tangential Leading Edge Blowing (TLEB). Vortical flow response both to steady blowing and to unsteady blowing is investigated. It is found that TLEB can redevelop stable, strong vortices even in the post-stall angle of attack regime. Analysis of the steady data shows that the effect of leading edge blowing can be interpreted as an effective change in angle of attack. The examination of the fundamental time scales for vortical flow re-organization after the application of blowing for different initial states of the flow field is studied. Different time scales for flow re-organization are shown to depend upon the effective angle of attack. A faster response time can be achieved at angles of attack beyond stall by a suitable choice of the initial blowing momentum strength. Consequently, TLEB shows the potential of controlling the vortical flow over a wide range of angles of attack; i.e., in both for pre-stall and post-stall conditions. Lee, K. T. and Roberts, Leonard BLOWING; DELTA WINGS; FLOW DISTRIBUTION; LEADING EDGES; VORTICES; AIRCRAFT MANEUVERS; ANGLE OF ATTACK; MOMENTUM; NONLINEARITY; STABILITY...

Controlled Vortical Flow on Delta Wings Through Unsteady Leading Edge Blowing

Controlled Vortical Flow on Delta Wings Through Unsteady Leading Edge Blowing
Title Controlled Vortical Flow on Delta Wings Through Unsteady Leading Edge Blowing PDF eBook
Author K. T. Lee
Publisher
Pages 178
Release 1990
Genre Airplanes
ISBN

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Computational Study of the Aerodynamics and Control by Blowing of Asymmetric Vortical Flows Over Delta Wings

Computational Study of the Aerodynamics and Control by Blowing of Asymmetric Vortical Flows Over Delta Wings
Title Computational Study of the Aerodynamics and Control by Blowing of Asymmetric Vortical Flows Over Delta Wings PDF eBook
Author National Aeronautics and Space Administration (NASA)
Publisher Createspace Independent Publishing Platform
Pages 40
Release 2018-07
Genre
ISBN 9781722121082

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Some of the work is described which was done in a study of the flow field produced by tangential leading edge blowing on a 60 deg. delta wing. The flow is studied computationally by solving the Thin Layer Navier-Stokes equations. Steady state flow fields are calculated for various angles of attack and yaw, with and without the presence of tangential leading edge blowing. The effectiveness of blowing as a rolling moment control mechanism to extend the envelope of controllability is illustrated at pre- and post-stall angles of attack. The numerical grid is generated using algebraic grid generation and various interpolation and blending techniques. The jet emanates from a slot with linearly varying thickness and is introduced into the flow field using the concept of an actuator plane, thereby not requiring resolution of the jet slot geometry. The Baldwin-Lomax algebraic turbulence model is used to provide turbulent closure. The computational results are compared with those of experiments. Craig, Ken Unspecified Center ...

Tangential Leading Edge Blowing for Flow Control on Non-slender Delta Wings

Tangential Leading Edge Blowing for Flow Control on Non-slender Delta Wings
Title Tangential Leading Edge Blowing for Flow Control on Non-slender Delta Wings PDF eBook
Author James Chard
Publisher
Pages
Release 2018
Genre
ISBN

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Unsteady Aerodynamics of Delta Wings Performing Maneuvers to High Angle of Attack

Unsteady Aerodynamics of Delta Wings Performing Maneuvers to High Angle of Attack
Title Unsteady Aerodynamics of Delta Wings Performing Maneuvers to High Angle of Attack PDF eBook
Author Mohammad-Ameen M. Jarrah
Publisher
Pages 352
Release 1988
Genre Aerodynamics
ISBN

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The Control of Vortical Lift on Delta Wings by Tangential Leading Edge Blowing

The Control of Vortical Lift on Delta Wings by Tangential Leading Edge Blowing
Title The Control of Vortical Lift on Delta Wings by Tangential Leading Edge Blowing PDF eBook
Author N. J. Wood
Publisher
Pages 10
Release 1987
Genre
ISBN

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