Roll-yaw Control at High Angle of Attack by Forebody Tangential Blowing PDF Download
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Author: Nelson Pedreiro
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 56
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Book Description
Author: Nelson Pedreiro
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 56
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722725709
Category :
Languages : en
Pages : 54
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Book Description
The feasibility of using forebody tangential blowing to control the roll-yaw motion of a wind tunnel model is experimentally demonstrated. An unsteady model of the aerodynamics is developed based on the fundamental physics of the flow. Data from dynamic experiments is used to validate the aerodynamic model. A unique apparatus is designed and built that allows the wind tunnel model two degrees of freedom, roll and yaw. Dynamic experiments conducted at 45 degrees angle of attack reveal the system to be unstable. The natural motion is divergent. The aerodynamic model is incorporated into the equations of motion of the system and used for the design of closed loop control laws that make the system stable. These laws are proven through dynamic experiments in the wind tunnel using blowing as the only actuator. It is shown that asymmetric blowing is a highly non-linear effector that can be linearized by superimposing symmetric blowing. The effects of forebody tangential blowing and roll and yaw angles on the flow structure are determined through flow visualization experiments. The transient response of roll and yaw moments to a step input blowing are determined. Differences on the roll and yaw moment dependence on blowing are explained based on the physics of the phenomena. Pedreiro, N. and Rock, S. M. and Celik, Z. Z. and Roberts, L. Ames Research Center...
Author: Nelson Pedreiro
Publisher:
ISBN:
Category : Flight control
Languages : en
Pages : 174
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 66
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 980
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 704
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 516
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Book Description
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 724
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 460
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 618
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