GLTRS--Glenn
TITLE AND SUBTITLE:
On the Development of a Unique Arc Jet Test Apparatus for Control Surface Seal Evaluations

AUTHOR(S):
Joshua R. Finkbeiner, Patrick H. Dunlap, Jr., Bruce M. Steinetz, Malcolm Robbie, Gus Baker, and Arthur Erker

REPORT DATE:
October 2004

FUNDING NUMBERS:
WBS-22-794-40-4V

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
John H. Glenn Research Center at Lewis Field
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-14695

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, DC 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-2004-213204
AIAA-2004-3891

SUPPLEMENTARY NOTES:
Prepared for the 40th Joint Propulsion Conference and Exhibit cosponsored by the AIAA, ASME, SAE, and ASEE, Fort Lauderdale, Florida, July 11-14, 2004. Joshua R. Finkbeiner, Patrick H. Dunlap, and Bruce M. Steinetz, NASA Glenn Research Center; and Malcolm Robbie, Gus Baker, and Arthur Erker, Analex Corporation, Brook Park, Ohio 44142. Responsible person, Joshua R. Finkbeiner, organization code 5950, 216-433-6080.

ABSTRACT:
NASA Glenn has developed a unique test apparatus capable of evaluating control surface seal and flap designs under simulated reentry heating conditions in NASA Johnson's arc jet test facility. The test apparatus is capable of testing a variety of seal designs with a variety of control surface materials and designs using modular components. The flap angle can be varied during testing, allowing modification of the seal environment while testing is in progress. The flap angle is varied using an innovative transmission system which limits heat transfer from the hot flap structure to the motor, all while keeping the components properly aligned regardless of thermal expansion. A combination of active and passive cooling is employed to prevent thermal damage to the test fixture while still obtaining the target seal temperature.

SUBJECT TERMS:
Sealing; Spacecraft structures; Leakage reduction; Hypersonic heat transfer; Hypersonic test apparatus; Arc chambers

NUMBER OF PAGES:
30

PDF AVAILABLE FROM URL:
2004/TM-2004-213204.pdf ( 3,846 KB )
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