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Aerodynamic Development of Boundary Layer Control System for NAL QSTOL Research Aircraft ‘ASKA’
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Abstract
“ASKA” developed by National Aerospace Laboratory (NAL) is a quiet, short take-off and landing (QSTOL) research aircraft adopting upper surface blowing (USB) concept as a powered high lift system. To achieving sufficient STOL performance by augmenting stall angle of attack and roll control power, blowing BLC technique was applied to the outboard leading edges and ailerons.Supplied high pressure air to save the BLC piping space,the BLC system which was fit for use of high pressure air was developed. The BLC system, in which BLC air is discharged by a series of discrete jets from small drilled holes (0.8 ∼ 3.0 mm in diameter) arranged in a raw, is one of the unique features of the aircraft.
In this paper, the summaries of aerodynamic development of the BLC system are described except for the air piping system.
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Fujieda, H., Takahashi, H., Miyamoto, Y., Miyashita, J. et al., "Aerodynamic Development of Boundary Layer Control System for NAL QSTOL Research Aircraft ‘ASKA’," SAE Technical Paper 912010, 1991, https://doi.org/10.4271/912010.Also In
References
- STOL Aircraft Project Group, Basic Design of Quiet Short Take-Off and Landing Research Aircraft 1981
- May Fred W. Aerodynamic Development of High Pressure Leading Edge Blowing Boundary Layer Control System 17th Aerospace Sciences Meeting 79-0116 1979
- Werle, Henri 1973
- Lachman G.V. Boundary Layer and Flow Control Pergamon Press 1961
- Shapiro Ascher H. The Dynamics and Thermodynamics of Compressible Fluid Flow 1
- 1986 Boundary Layer Control System for Movable Wing of Aircraft