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A numerical study of the application of vane and air-jet vortex generators

Published online by Cambridge University Press:  04 July 2016

C. Küpper  and
F. S. Henry
C. Küpper
Affiliation:
Department of Aeronautical, Civil and Mechanical Engineering City University, London, UK Department of Meteorology, University of Reading, Reading, UK
F. S. Henry
Affiliation:
Department of Aeronautical, Civil and Mechanical Engineering City University, London, UK
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Abstract

The objective of the work described in this paper was to identify differences in the flow fields immediately downstream of air-jet and vane vortex generators. The flows were assumed to be incompressible and fully turbulent and were solved using the finite volume, Navier-Stokes code CFX 4 (CFDS, AEA Technology, Harwell) on a non-orthogonal, body-fitted grid using the k-ε turbulence model and standard wall functions. The behaviour of the longitudinal vortices produced by the vanes and air jets is presented in terms of stream-wise and cross-stream velocity profiles, circulation and peak vorticity decay, peak vorticity paths in the cross-stream and streamwise direction, cross-stream vorticity profiles, and cross-stream distribution of shear stress. The predicted results show that the vanes and air jets considered produce vortices with significantly different circulation strengths, but that the enhancement of skin friction was of similar magnitude in both cases.

Type
Research Article
Information
The Aeronautical Journal , Volume 105 , Issue 1047 , April 2001 , pp. 255 - 265
Copyright
Copyright © Royal Aeronautical Society 2002 

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