Accession Number : AD0654439

Title :   EXPERIMENTAL INVESTIGATION OF THE IMPACT PRESSURE PROBE METHOD OF MEASURING LOCAL SKIN FRICTION AT SUPERSONIC SPEEDS IN PRESENCE OF AN ADVERSE PRESSURE GRADIENT,

Corporate Author : TEXAS UNIV AUSTIN DEFENSE RESEARCH LAB

Personal Author(s) : Naleid,J. F.

Report Date : AUG 1958

Pagination or Media Count : 62

Abstract : The use of the surface impact pressure probe method of measuring local skin friction at supersonic speeds in the presence of an adverse pressure gradient was investigated. Test conditions were at a nominal free-stream Mach Number of 2.0 and eight pressure gradients ranging from dp/dx approx. = - 0.150 psi/in. to dp/dx approx. = + 0.70 psi/in. The Reynolds Number per foot was held constant. Skin friction values measured directly by means of a skin friction balance were used to check the validity of skin friction values obtained from theory and surface probe measurements. The results of the test show that the surface impact probe method of determining local skin friction is accurate and reliable in compressible flow in the presence of an adverse pressure gradient with zero heat transfer. (Author)

Descriptors :   (*SUPERSONIC CHARACTERISTICS, SKIN FRICTION), (*SKIN FRICTION, PRESSURE GAGES), IMPACT, SURFACES, TEST METHODS, ACCURACY, RELIABILITY

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE