Accession Number : AD0784896

Title :   Turbulence Measurements in Hypersonic, Helium Flow.

Descriptive Note : Interim rept.,

Corporate Author : PRINCETON UNIV N J DEPT OF AEROSPACE AND MECHANICAL SCIENCES

Personal Author(s) : Anders,John B. , Jr

Report Date : FEB 1974

Pagination or Media Count : 108

Abstract : Incompressible and compressible hot-wire theory is reviewed and many of the basic hot-wire equations are derived in detail. The instrumentation and probes used for measurements in a hypersonic boundary layer on the wall of a Mach 16 helium tunnel are described. Procedures for individual wire calibrations are outlined and typical results are presented. Data from measurements at the peak fluctuation point in the boundary layer are presented in terms of the rms mass flow and total temperature fluctuations. The data reduction problems encountered in compressible flow measurements are discussed, and the limitations of the hot-wire in hypersonic turbulent boundary layer measurements are pointed out. (Author)

Descriptors :   *Turbulent boundary layer, Hot wire, Probes, Hypersonic flow, Compressible flow, Incompressible flow, Helium

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE