Accession Number:

AD0261368

Title:

LOCAL AERODYNAMIC HEAT TRANSFER AND BOUNDARY-LAYER TRANSITION ON ROUGHENED SPHERE-ELLIPSOID BODIES AT MACH NUMBER 3.0

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Report Date:

1961-08-01

Pagination or Media Count:

1.0

Abstract:

Experimental heating rates and pressure distributions obtained from aerodynamic heating tests on four steel sphere-ellipsoid bodies with surface roughnesses of 5, 100, and 200 microinches are presented. Free- tream Reynolds numbers based on model spherical diameter, were 4.25 x 10 to the 6th power and 2.76 x 10 to the 6th power, and the stagnation temperature was 650 F. The tests showed that the combination of surface roughness and boundary-layer cooling tend d to promo e arly ra sition and nullify the advantages attributable to the blunt shape of the model for reducing local temperatures. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE