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Developing mass spectrometric techniques for boundary layer measurement in hypersonic high enthalpy test facilitiesThermodynamic flow properties of gases in the boundary layer or the flowfield have been mainly deduced from pressures and temperatures measured on a model. However, further progress with respect to an understanding of these properties requires a more complete characterization of the layer including determination of the gas composition and chemistry. Most attempts to measure boundary layer chemistry involve the employment of a mass spectrometer and an associated gas sampling system. The three major limiting factors which must be addressed for species measurement in aerothermodynamic investigations on models at reentry stream velocities, are gas sampling effects, instrument limitations, and problems with data acquisition. The present investigation is concerned with a concentrated effort to quantitatively identify and correct for instrument and sampling system effects, and to develop a miniaturized high performance mass spectrometer for on-model real-time analysis of the boundary layer and its associated atmosphere.
Document ID
19830058719
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wood, G. M., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Lewis, B. W.
(NASA Langley Research Center Hampton, VA, United States)
Nowak, R. J.
(NASA Langley Research Center Hampton, VA, United States)
Eide, D. G.
(NASA Langley Research Center Hampton, VA, United States)
Paulin, P. A.
(NASA Langley Research Center Hampton, VA, United States)
Upchurch, B. T.
(NASA Langley Research Center Hampton; Old Dominion University, Norfolk, VA, United States)
Date Acquired
August 11, 2013
Publication Date
September 1, 1983
Subject Category
Instrumentation And Photography
Accession Number
83A39937
Distribution Limits
Public
Copyright
Other

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