Accession Number:

AD0256234

Title:

EFFECTS OF COOLING ON TRANSITION IN THE BOUNDARY LAYER ON A HEMISPHERE IN SIMULATED HYPERSONIC FLOW

Descriptive Note:

Corporate Author:

MICHIGAN UNIV ANN ARBOR

Personal Author(s):

• DUNLAP, ROGER
• KUETHE, A. M.

Report Date:

1961-02-01

Pagination or Media Count:

117.0

Abstract:

A study was made to investigate the effects of cooling on transition in the boundary layer on the nose of a 9-inch diameter hemisphere in simulated hypersonic flow, with the aim of gaining some knowledge of the circumstances under which boundary-layer cooling may promote a reduction in transition Reynolds number transition reversal. The influences of cooling in increasing the stability to Tollmien-Schlichting type disturbances, in decreasing any stabilizing effects of convex curvature, and in increasing the magnitude of disturbances from fixed roughness elements, are discussed.

Descriptors:

• *BOUNDARY LAYER
• *TURBULENCE
• *COOLING
• *BLUNT BODIES
• *HYPERSONIC FLOW
• VELOCITY
• MODEL TESTS
• LAMINAR BOUNDARY LAYER
• BODIES OF REVOLUTION
• PRESSURE
• AERODYNAMIC CHARACTERISTICS
• MATHEMATICAL ANALYSIS
• TURBULENT BOUNDARY LAYER
• HEAT TRANSFER
• TEMPERATURE

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE