Accession Number:
AD0621345
Title:
MICROWAVE MEASUREMENTS ON SHOCK WAVES IN AIR.
Descriptive Note:
Reprint,
Corporate Author:
HEBREW UNIV JERUSALEM (ISRAEL) DEPT OF PHYSICS
Report Date:
1963-01-01
Pagination or Media Count:
5.0
Abstract:
The microwave attenuation by shock waves in air was investigated in the Mach No. range of 8 - 12 and at pressures 1-5 mm Hg. It is shown that an analysis of the time dependence of the attenuation yields important information regarding a the maximum electron-density b the build-up of the electron density and the beginning of the shock, c the electron density near the contact surface, and d the length of the heated slug section. An investigation was made of the effect of transitions from a larger diameter shock tube to a smaller tube on the maximum microwave attention, on its time dependence, and on the Mach No. In particular, a study was made of the effect of shorter and larger taper sections as well as abrupt transitions for various Mach Numbers and initial pressures. Author