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Analysis and testing of high entrainment single nozzle jet pumps with variable mixing tubesAn analytical model was developed to predict the performance characteristics of axisymmetric single-nozzle jet pumps with variable area mixing tubes. The primary flow may be subsonic or supersonic. The computer program uses integral techniques to calculate the velocity profiles and the wall static pressures that result from the mixing of the supersonic primary jet and the subsonic secondary flow. An experimental program was conducted to measure mixing tube wall static pressure variations, velocity profiles, and temperature profiles in a variable area mixing tube with a supersonic primary jet. Static pressure variations were measured at four different secondary flow rates. These test results were used to evaluate the analytical model. The analytical results compared well to the experimental data. Therefore, the analysis is believed to be ready for use to relate jet pump performance characteristics to mixing tube design.
Document ID
19720020347
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Hickman, K. E.
(Dynatech Corp. Cambridge, MA, United States)
Hill, P. G.
(Dynatech Corp. Cambridge, MA, United States)
Gilbert, G. B.
(Dynatech Corp. Cambridge, MA, United States)
Date Acquired
September 2, 2013
Publication Date
June 1, 1972
Publication Information
Publisher: NASA
Subject Category
Aerodynamics
Report/Patent Number
NASA-CR-2067
Accession Number
72N27997
Funding Number(s)
CONTRACT_GRANT: NAS2-5845
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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