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The three-dimensional mixing layer between two grazing perpendicular streams

Published online by Cambridge University Press:  29 March 2006

J. E. Hackett  and
D. K. Cox
J. E. Hackett
Affiliation:
Aerodynamics Division, National Physical Laboratory, Teddington, Middlesex Present address: Aerospace Laboratory, Lockheed-Georgia Company, Marietta, Georgia 30060, U.S.A.
D. K. Cox
Affiliation:
Aerodynamics Division, National Physical Laboratory, Teddington, Middlesex
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Abstract

The three-dimensional mixing layer between two grazing perpendicular streams is investigated both theoretically and experimentally. Similar shear velocity profiles are present about 40 initial momentum thicknesses downstream of the splitter edges. Thereafter the velocity component in the resultant direction of the two streams is shown to be constant through the layer; the profile perpendicular to this (the shear direction) has approximately an error function form. The ratio of the maximum shear stress to the square of the shear velocity difference is about 50% greater than in a two-dimensional layer.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 43 , Issue 1 , 17 August 1970 , pp. 77 - 96
Copyright
© 1970 Cambridge University Press

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References

Ashkenas, H. L. 1958 NACA TN 4140.
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Bradshaw, P. 1966 J. Fluid Mech. 26, 225–236.
Bradshaw, P. 1969 N.P.L. Aero Rep. 1286.
Gartshore, I. 1965 Ph.D. Thesis, University of Cambridge.
Hackett, J. E. & Cox, D. K. 1967 N.P.L. Aero Rep. 1248.
Liepmann, H. W. & Laufer, J. 1947 NACA TN 1257.
Townsend, A. A. 1956 The Structure of Turbulent Shear Flow. Cambridge University Press.