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Structural Analyses of Stirling Power Convertor Heater Head for Long-Term Reliability, Durability, and PerformanceDeep-space missions require onboard electric power systems with reliable design lifetimes of up to 10 yr and beyond. A high-efficiency Stirling radioisotope power system is a likely candidate for future deep-space missions and Mars rover applications. To ensure ample durability, the structurally critical heater head of the Stirling power convertor has undergone extensive computational analyses of operating temperatures (up to 650 C), stresses, and creep resistance of the thin-walled Inconel 718 bill of material. Durability predictions are presented in terms of the probability of survival. A benchmark structural testing program has commenced to support the analyses. This report presents the current status of durability assessments.
Document ID
20110016579
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Halford, Gary R. (NASA Glenn Research Center Cleveland, OH, United States)
Shah, Ashwin (Sest, Inc. Middleburgh Heights, OH, United States)
Arya, Vinod K. (Akron Univ. Akron, OH, United States)
Krause, David L. (NASA Glenn Research Center Cleveland, OH, United States)
Bartolotta, Paul A. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 25, 2013
Publication Date
April 1, 2002
Subject Category
Structural Mechanics
Report/Patent Number
NASA/TM-2002-211327
E-13136
Meeting Information
Meeting: Space Technology and Applications International Forum (STAIF-2002)
Location: Albuquerque, NM
Country: United States
Start Date: February 3, 2002
End Date: February 7, 2002
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WORK_UNIT: WU 896-50-10-00
PROJECT: RTOP 783-82-00
Distribution Limits
Public
Copyright
Public Use Permitted.

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