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Record Details

Record 3 of 15611
High temperature skin friction measurement
Author and Affiliation:
Tcheng, Ping(NASA Langley Research Center, Hampton, VA, United States)
Holmes, Harlan K.(NASA Langley Research Center, Hampton, VA, United States)
Supplee, Frank H., Jr.(NASA Langley Research Center, Hampton, VA, United States)
Abstract: Skin friction measurement in the NASA Langley hypersonic propulsion facility is described. The sensor configuration utilized an existing balance, modified to provide thermal isolation and an increased standoff distance. For test run times of about 20 sec and ambient-air cooling of the test section and balance, the modified balance performed satisfactorily, even when it was subjected to acoustic and structural vibration. The balance is an inertially balanced closed-loop servo system where the current to a moving-coil motor needed to restore or null the output from the position sensor is a measure of the force or skin friction tending to displace the moving element. The accuracy of the sensor is directly affected by the position sensor in the feedback loop, in this case a linear-variable differential transformer which has proven to be influenced by temperature gradients.
Publication Date: Jan 01, 1989
Document ID:
19900041251
(Acquired Nov 28, 1995)
Accession Number: 90A28306
Subject Category: INSTRUMENTATION AND PHOTOGRAPHY
Document Type: Conference Paper
Publication Information: (SEE A90-28251)
Publisher Information: United States
Meeting Information: ICIASF '89; 13th; Sept. 18-21, 1989; Goettingen; Germany
Financial Sponsor: NASA; United States
Organization Source: NASA Langley Research Center; Hampton, VA, United States
Description: 12p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FRICTION MEASUREMENT; HIGH TEMPERATURE TESTS; HYPERSONIC FLIGHT; HYPERSONIC VEHICLES; SKIN FRICTION; ERROR SIGNALS; THERMOCOUPLES
Imprint And Other Notes: IN: ICIASF '89 - International Congress on Instrumentation in Aerospace Simulation Facilities, 13th, Goettingen, Federal Republic of Germany, Sept. 18-21, 1989, Record (A90-28251 11-35). New York, Institute of Electrical and Electronics Engineers, Inc., 1989, p. 583-594.
Availability Source: Other Sources
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