Accession Number:

ADA255397

Title:

A Plume-Induced Boundary Layer Separation Experiment

Descriptive Note:

Rept. for 1 Jan-30 Jun 92,

Corporate Author:

ILLINOIS UNIV AT URBANA DEPT OF MECHANICAL AND INDUSTRIAL ENGINEERING

Personal Author(s):

Report Date:

1992-06-30

Pagination or Media Count:

18.0

Abstract:

The current paper describes an experimental investigation of a PIBLS flowfield produced by the interaction between two nonparallel, supersonic streams in the presence of a finite thickness base. The purpose of the study is to gain a better understanding of., the extent to which the fluid dynamic mechanisms and interactions present in the PIBLS flowfield influence the turbulence properties of the flow. A two-stream, supersonic wind tunnel, incorporating a two-dimensional planar geometry and operating in the blowdown mode, was specifically designed to produce a PIBLS flowfield. Preliminary experiments have demonstrated that the wind tunnel is capable of producing a wide range of PIBLS flowfields by simply regulating the stagnation pressure of the lower stream jet flow relative to the upper stream freestream flow. One PIBLS flowfield has been chosen in which to conduct a detailed set of measurements. This flowfield has its separation point located about 6 delta 0 upstream of the base corner. A detailed study of this PIBLS flowfield is under way using schlieren photography and shadowgraph pictures, surface streakline visualization, surface static pressure measurements, and two-component, coincident LDV measurements.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE