CONICAL SIMILARITY OF SHOCK/BOUNDARY LAYER INTERACTIONS GENERATED BY SWEPT FINS.

A parametric experimental study has been made of the class of 3D shock wave/turbulent boundary layer interactions generated by swept-leading-edge fins. The fin sweepback angles ranged from 0 to 65 deg at angles of attack of 5, 9, and 15 deg. Two equilibrium 2D turbulent boundary layers with a free-stream Mach number of 2.95 and a Reynolds number of 6.3 x 10 to the 7th/m were used as incoming flow conditions. All the resulting interactions were found to possess conical symmetry of surface pressures and skin friction lines beyond an initial inception zone. Further, these interactions revealed a simple similarity based on inviscid shock strength irrespective of fin sweepback or angle of attack.

[1]  John L. Stollery,et al.  An experimental study of the interaction between a glancing shock wave and a turbulent boundary layer , 2005 .

[2]  B. Oskam,et al.  Mach 3 oblique shock wave/turbulent boundary layer interactions in three dimensions , 1976 .

[3]  A. McCabe,et al.  The Three-Dimensional Interaction of a Shock Wave with a Turbulent Boundary Layer , 1966 .

[4]  Gary S. Settles,et al.  Scaling of Two- and Three-Dimensional Shock/Turbulent Boundary-Layer Interactions at Compression Corners , 1982 .

[5]  E. C. Maskell.  Flow separation in three dimensions , 1955 .

[6]  N. A. Ostapenko,et al.  Structure of flow in the separation region resulting from interaction of a normal shock wave with a boundary layer in a corner , 1979 .

[7]  J. Green.  Interactions between shock waves and turbulent boundary layers , 1970 .

[8]  A. A. Zheltovodov.  Properties of two- and three-dimensional separation flows at supersonic velocities , 1979 .

[9]  G. Settles,et al.  Cylindrical and conical upstream influence regimes of 3D shock/turbulent boundary layer interactions , 1982 .

[10]  Gary S. Settles,et al.  Flow visualization methods for separated three-dimensional shock wave/turbulent boundary-layer interactions , 1983 .

[11]  Theodore J. Goldberg.  Three-Dimensional Separation for Interaction of Shock Waves with Turbulent Boundary Layers , 1973 .

[12]  G. E. Gadd.  Interactions between shock waves and boundary layers , 1958 .

[13]  L. R. Fowell.  Exact and Approximate Solutions for the Supersonic Delta Wing , 1956 .

[14]  K. Stewartson,et al.  On the interaction between shock waves and boundary layers , 1951, Mathematical Proceedings of the Cambridge Philosophical Society.

[15]  W. L. Hankey,et al.  Two-Dimensional Shock Wave-Boundary Layer Interactions in High Speed Flows, , 1975 .

[16]  D. Dolling,et al.  An examination of blunt fin-induced shock wave turbulent boundary layer interactions , 1979 .

[17]  R. H. Korkegi,et al.  A Simple Correlation for Incipient-Turbulent Boundary-Layer Separation due to a Skewed Shock Wave , 1973 .

[18]  R. Korkegi.  On the Structure of Three-Dimensional Shock-Induced Separated Flow Regions , 1976 .