Accession Number : AD0688894

Title :   OPTICAL AND MICROWAVE MEASUREMENTS BEHIND SHOCK WAVES.

Descriptive Note : Progress rept. no. 2 (Final), 1 Jun-31 Oct 68,

Corporate Author : HEBREW UNIV JERUSALEM (ISRAEL) MICROWAVE DIV

Personal Author(s) : Low,William

Report Date : NOV 1968

Pagination or Media Count : 47

Abstract : The Mach velocity, shock tube attenuation and the maximum test time have been measured in two narrow shock tubes of 1 inch and 1/2 inch diameter. The apparatus is described. The results are compared with theories of Mirels, Roshko and Russel. The results are also compared with experimental results on large cross-sectional shock tubes. It is shown that for pressures of 5 Torr or less the narrow shock tube attenuation and maximum test time fits within a geometric scaling factor those of large cross-sectional tubes. At pressures of 10 Torr and higher partial turbulent flow can explain the experimental results. (Author)

Descriptors :   (*SHOCK WAVES, *MEASUREMENT), (*SHOCK TUBES, INSTRUMENTATION), OPTICAL ANALYSIS, MICROWAVE EQUIPMENT, ELECTRON DENSITY, ATTENUATION, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, MACH NUMBER, VELOCITY, TURBULENCE, FLOW FIELDS, THERMODYNAMICS, DIAPHRAGMS(MECHANICS), VACUUM, PRESSURE, SPECTROMETERS, BOUNDARY LAYER, REYNOLDS NUMBER, LAMINAR FLOW, ISRAEL

Subject Categories : Test Facilities, Equipment and Methods
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE