Accession Number : AD0460172

Title :   MICROWAVE TECHNIQUES APPLICABLE TO SHOCK TUBE MEASUREMENTS.

Descriptive Note : Interim rept.,

Corporate Author : POLYTECHNIC INST OF BROOKLYN NY DEPT OF AEROSPACE ENGINEERING AND APPLIED MEC HANICS

Personal Author(s) : Lederman, Samuel ; Abele, Manlio ; Visich, Marian, Jr.

Report Date : SEP 1964

Pagination or Media Count : 31

Abstract : Several microwave techniques for the measurement of aerodynamic and electromagnetic properties of the flow fields in shock tubes are presented. In particular, microwave techniques applicable to the measurement of shock velocity, running time and electron density are discussed. By using the driven section of the shock tube as a wave guide which is excited by a single microwave antenna, simultaneous measurements of shock velocity attenuation and running time are obtained. The results of the running time measurements using the microwave method are compared with other diagnostic techniques. Measurements of electron densities are conducted with microwave resonant cavities. Two specific cavity arrangements are presented which are used to measure a wide range of electron densities corresponding to plasma frequencies below and above the resonant frequency. (Author)

Descriptors :   (*SHOCK TUBES, MICROWAVE EQUIPMENT), MEASUREMENT, AERODYNAMIC CHARACTERISTICS, ELECTROMAGNETIC PROPERTIES, ELECTROMAGNETIC RADIATION, SHOCK WAVES, VELOCITY, ELECTRON DENSITY, TIME.

Distribution Statement : APPROVED FOR PUBLIC RELEASE