An Experimental Study of Fluctuating Wall Pressures in a Highly Swept, Sharp Fin-Induced, Mach 5 Shock Wave/Turbulent
Abstract
Fluctuating wall pressure measurements have been made beneath the shock wave/turbulent boundary layer interaction generated by a sharp, unswept fin at angle of attack. Tests were conducted at Mach 5 with a freestream unit Reynolds number of 47.88 x 106 /m. The boundary layer developed naturally on the tunnel floor under approximately adiabatic temperature conditions. From visual inspection and standard time series analysis of fluctuating wall pressure signals, it has been shown that the separation shock wave undergoes a translating, intermittent type motion for fin angles between 16 and 28 degrees. Both the mean wall pressures and higher order moments are quasi-conically symmetric when collapsed in a conical coordinate system. Finally, the maximum wall pressure standard deviation in the intermittent region has been shown to scale with the sweep of the interaction and not with the inviscid pressure rise as has been previously suggested in the literature.... Shock wave, Boundary layer, Turbulent interaction, Interaction unsteadiness.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1993
- Accession Number
- ADA268394
Entities
People
- John D. Schmisseur
Organizations
- Wright Laboratory