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Microwave interferometry technique for obtaining gas interface velocity measurements in an expansion tube facilityA microwave interferometer technique to determine the front interface velocity of a high enthalpy gas flow, is described. The system is designed to excite a standing wave in an expansion tube, and to measure the shift in this standing wave as it is moved by the test gas front. Data, in the form of a varying sinusoidal signal, is recorded on a high-speed drum camera-oscilloscope combination. Measurements of average and incremental velocities in excess of 6,000 meters per second were made.
Document ID
19750003232
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Laney, C. C., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 3, 2013
Publication Date
November 13, 1974
Subject Category
Instrumentation And Photography
Report/Patent Number
NASA-TM-X-72625
Accession Number
75N11304
Funding Number(s)
PROJECT: RTOP 506-26-20-04
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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