Title :
Continuous Measurement of Shock and Contact Discontinuities Velocity
Author :
Anderson, Gorden F. ; Kelly, James G.
Author_Institution :
Brown University, Providence, R. I. 02912
fDate :
7/1/1967 12:00:00 AM
Abstract :
An experimental method applying microwave techniques to obtain continuous measurement of both the shock and contact discontinuities bounding an air plasma generated in a cylindrical hypersonic shock tube is developed. X-band microwave signals excited in the TE11 mode reflect from the moving shock and contact surfaces. The resulting FM interference pattern is demodulated, yielding continuous velocity versus time data. Results depicting subtle detail of velocity behavior, particularly of the shock front, were obtained over a shock Mach number range of 9 to 13.
Keywords :
Electric shock; Frequency; Instruments; Microwave measurements; Microwave propagation; Microwave theory and techniques; Plasma measurements; Plasma properties; Reflection; Velocity measurement; Doppler frequency; instrumentation; microwave; plasma properties; shock tube; shock velocity;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.1967.5408838