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Record Details

Record 31 of 19462
Experimental comparison of two hot-wire techniques for resolution of turbulent mass flux and local stagnation temperature in supersonic flow
Author and Affiliation:
Walker, D. A.(Virginia Polytechnic Inst. and State Univ., Blacksburg, VA, United States)
Ng, W. F.(Virginia Polytechnic Institute and State University, Blacksburg, United States)
Walker, M. D.(Virginia Polytechnic Inst. and State Univ., Blacksburg, VA, United States)
Abstract: The performance of two constant-temperature normal hot-wire techniques in a supersonic flow is examined. The first technique uses a single-wire and rapid scanning of multiple overheat ratios. Time averages of the signals at all overheats are used to separate the mean and rms mass flux, stagnation temperature and their cross-correlation. The second technique uses a dual-wire probe with each wire operating at different overheat ratios, giving instantaneous mass flux and stagnation temperature. Preliminary results indicate that the separation distance (0.18 mm) between the two hot wires in the dual-wire probe does not introduce significant error. However, the rms mass flux inferred from the dual-wire technique is a factor of two higher than that from the single-wire technique.
Publication Date: Jan 01, 1988
Document ID:
19880035087
(Acquired Nov 28, 1995)
Accession Number: 88A22314
Subject Category: INSTRUMENTATION AND PHOTOGRAPHY
Report/Patent Number: AIAA PAPER 88-0422
Document Type: Preprint
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Virginia Polytechnic Inst. and State Univ.; Blacksburg, VA, United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: HOT-WIRE ANEMOMETERS; MASS FLOW; STAGNATION TEMPERATURE; SUPERSONIC FLOW; TURBULENT FLOW; CALIBRATING; CROSS CORRELATION; FREQUENCY RESPONSE; NATIONAL AEROSPACE PLANE PROGRAM
Imprint And Other Notes: AIAA, Aerospace Sciences Meeting, 26th, Reno, NV, Jan. 11-14, 1988. 9 p. Research supported by Johns Hopkins University and NASA.
Availability Source: Other Sources
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