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Effect of number of probes and their orientation on the calculation of several compressor face distortion descriptorsA study was performed to determine the effects of the number and position of total pressure probes on the calculation of five compressor face distortion descriptors. This study used three sets of 320 steady state total pressure measurements that were obtained with a special rotating rake apparatus in wind tunnel tests of a mixed-compression inlet. The inlet was a one third scale model of the inlet on a YF-12 airplane, and it was tested in the wind tunnel at representative flight conditions at Mach numbers above 2.0. The study shows that large errors resulted in the calculation of the distortion descriptors even with a number of probes that were considered adequate in the past. There were errors as large as 30 and -50 percent in several distortion descriptors for a configuration consisting of eight rakes with five equal-area-weighted probes on each rake.
Document ID
19790014916
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Stoll, F. (NASA Hugh L. Dryden Flight Research Center Edwards, CA, United States)
Tremback, J. W. (NASA Hugh L. Dryden Flight Research Center Edwards, CA, United States)
Arnaiz, H. H. (NASA Hugh L. Dryden Flight Research Center Edwards, CA, United States)
Date Acquired
September 3, 2013
Publication Date
May 1, 1979
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NASA-TM-72859
H-1070
Accession Number
79N23087
Funding Number(s)
PROJECT: RTOP 505-11-24
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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