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The calculation of separation bubbles in interactive turbulent boundary layers

Published online by Cambridge University Press:  20 April 2006

Tuncer Cebeci  and
Suzanne M. Schimke
Tuncer Cebeci
Affiliation:
Mechanical Engineering Department, California State University, Long Beach, California
Suzanne M. Schimke
Affiliation:
Aerodynamics Research Department, Douglas Aircraft Company, Long Beach, California
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Abstract

A viscous–inviscid interaction procedure is presented for computing incompressible separation bubbles in two-dimensional flows. The analysis consists of the solution of the inviscid-flow equations with a conformal-mapping method and the solution of the boundary-layer equations with an inverse procedure. The boundary-layer equations employ the Cebeci–Smith algebraic eddy-viscosity formulation. The coupling between the inviscid and boundary-layer equations is established through the Hilbert integral by using Veldman's suggestion. An empirical method is used to calculate the location of transition, which is found to play a key role in predicting the behaviour of separating flows. Numerical solutions are presented for transitional bubbles on an NACA 663-018 airfoil at two angles of attack for a chord Reynolds number of 2 × 106. Comparisons wth experiment show that the flow properties of the separation bubbles can be predicted very well with this procedure provided that an accurate estimate of transition location is made.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 131 , June 1983 , pp. 305 - 317
Copyright
© 1983 Cambridge University Press

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