A joint experimental and computational study has been performed to inv
estigate the B flowfield structure created by two crossing oblique sho
ck waves interacting with a turbulent boundary layer. Such an interact
ion is of practical importance in the design of high-speed sidewall-co
mpression inlets. The interaction is created by a test model, consisti
ng of two sharp fins mounted at 15-deg angle of attack to a Bat plate,
placed in a Mach 3.85 freestream flow with a unit Reynolds number of
76 x 10(6)/m. Two computational solutions, one using a Baldwin-Lomax a
lgebraic turbulent eddy viscosity model and one using a modified kappa
-epsilon (Rodi) turbulence model, are compared with experimental flowf
ield data obtained from a fast-response five-hole probe, Both the expe
riment and the computations show that the flowfield is dominated by a
large, low-Mach-number, low-total-pressure separated region located on
the interaction centerline, A comparison of the results shows signifi
cant differences between experiment and computations within this separ
ated region, Outside the separated region, the experiment and computat
ions are in good agreement. Additionally, the comparison shows that bo
th turbulence models provide similar results, with neither model being
clearly superior in predicting the flowfield.