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Update on results of SPRE testing at NASA LewisThe Space Power Research Engine (SPRE), a free-piston Stirling engine with a linear alternator, is being tested at NASA Lewis Research Center as part of the Civilian Space Technology Initiative (CSTI) as a candidate for high capacity space power. Results are presented from recent SPRE tests designed to investigate the effects of variation in the displacer seal clearance and piston centering port area on engine performance and dynamics. The effects of these variations on PV power and efficiency are presented. Comparisons of the displacer seal clearance test results with HFAST code predictions show good agreement for PV power but poor agreement for PV efficiency. Correlations are presented relating the piston mid-stroke position to the dynamic Delta P across the piston and the centering port area. Test results indicate that a modest improvement in PV power and efficiency may be realized with a reduction in piston centering port area.
Document ID
19920068156
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Cairelli, James E.
(NASA Lewis Research Center Cleveland, OH, United States)
Swec, Diane M.
(NASA Lewis Research Center Cleveland, OH, United States)
Wong, Wayne A.
(NASA Lewis Research Center Cleveland, OH, United States)
Doeberling, Thomas J.
(NASA Lewis Research Center Cleveland, OH, United States)
Madi, Frank J.
(Sverdrup Technology, Inc. Brook Park, OH, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Spacecraft Propulsion And Power
Meeting Information
Meeting: IECEC ''91: Intersociety Energy Conversion Engineering Conference
Location: Boston, MA
Country: United States
Start Date: August 4, 1991
End Date: August 9, 1991
Accession Number
92A50780
Distribution Limits
Public
Copyright
Other

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