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A miniature high frequency sphere probeA spherical probe having five surface mounted silicon pressure sensors is described. The probe is 0.2 inches in diameter yielding a frequency response above 30 kHz. A scheme is described for retrieving from the five pressure signals the stagnation and static pressures, Mach number and flow angles in two planes. The calibrations forming the base for this procedure, obtained from steady state tests, are given in the form of polynomials in the two flow angles. A method for compensating the silicon pressure sensors for thermal effects is given. Typical data obtained in the MIT Blowdown Compressor are presented in raw form and after reduction to flow angles, Mach number and stagnation pressure.
Document ID
19800051964
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Kerrebrock, J. L. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Epstein, A. H. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Thompkins, W. T., Jr. (MIT Cambridge, Mass., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Measurement methods in rotating components of turbomachinery
Location: New Orleans, LA
Start Date: March 10, 1980
End Date: March 13, 1980
Accession Number
80A36134
Funding Number(s)
CONTRACT_GRANT: NGL-22-009-383
Distribution Limits
Public
Copyright
Other

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