库塔条件
库塔条件(英語:)是流体力学与空气动力学中的一个原则,其名称源于德国数学家、空气动力学家马丁·威廉·库塔。
库塔条件是指当有尖锐后缘的物体(如翼型)在流体中运动时,会产生一个绕物体环量,其强度恰好能使流经上、下表面的流体在后缘处平滑汇合,使得后缘成为流动驻点(速度为零)。如后缘非尖点而为小圆弧时,库塔条件要求流经上、下表面后的流体速度在后缘处为相等的有限值。
库塔条件是由黏性导致的,使用库塔条件可以在无黏势流理论中引入黏性效应,这在计算升力时十分重要(库塔-儒可夫斯基定理)。
参见
参考文献
- Clancy, L.J. (1975) Aerodynamics, Pitman Publishing Limited, London. ISBN 0-273-01120-0
- "Flow around an airfoil" at the University of Geneva 页面存档备份,存于
- "Kutta condition for lifting flows" by Praveen Chandrashekar of the National Aerospace Laboratories of India
- Anderson, John (1991). Fundamentals of Aerodynamics, 2nd edition, 260-263, Toronto: McGraw-Hill. ISBN 0-07-001679-8.
- A.M. Kuethe and J.D. Schetzer, Foundations of Aerodynamics, John Wiley & Sons, Inc. New York (1959) ISBN 0-471-50952-3
- Massey, B.S. Mechanics of Fluids. Section 9.10, 2nd Edition. Van Nostrand Reinhold Co. London (1970) Library of Congress Catalog Card No. 67-25005
- C. Xu, "Kutta condition for sharp edge flows", Mechanics Research Communications 25(4):415-420 (1998).
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