Sub-Topic: Liquid Rocket Engine Testing AIAA Short Course on Liquid Rocket Engines 41st Joint ...

57 Pages·2005·5.09 MB·English

https://ntrs.nasa.gov/search.jsp?R=20050182932 2019-03-28T06:44:07+00:00Z
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AA 41st Joint Propulsion Conference
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AIAA Short Course on
Liquid Rocket Engines
Dr. Shamim Rahman
NASA John C. Stennis Space Center, MS
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ee • Objectives and Motivation for Testing
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– Technology, RDT&E, Evolutionary
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o o • Representative LRE Test Campaigns
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lidlid • Overview of Test Facilities for Liquid Rocket Engines
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riorio – Boost, Upper Stage (Sea-level and Altitude)
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– LOX/LH, LOX/RP, Other development
• Test Project Enablers: Engineering Tools, Operations, Processes,
Infrastructure
Continued on Next Page …
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ss • Non-NASA Test Capability (CPIA)
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uu • Development testing is required to achieve design maturity, demonstrate capability, and to reduce risk to the
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ee qualification program. Development tests are conducted, as required, to:
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tsts – Validate new design concepts or the application of proven concepts and techniques to a new configuration,
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– Assist in the evolution of designs from the conceptual phase to the operational phase,
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;; An objective of development testing is to identify problems early in their design evolution so that any required corrective
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Generally qualification follows completion of the development test program.
• Acceptance tests are conducted to demonstrate the acceptability of each deliverable item to meet performance
specification and demonstrate error-free workmanship in manufacturing. Acceptance testing is intended to:
– Stress screen items to precipitate incipient failures due to latent defects in parts, processes, materials, and workmanship,
– Component acceptance testing at the bench level serves to reduce risk for engine acceptance testing, but it may not
simulate the engine environments adequately.
Many components require engine hot fire to adequately reduce flight risk. (An engine LRU is a component that may be
removed and replaced by a new unit, without requiring reacceptance test firing of the engine with the new unit. If the unit
being replaced was included in an engine acceptance test firing as part of its acceptance test, then the replacement unit
either should be subjected to such a test on an engine, or should undergo equivalent unit-level acceptance testing).
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• Component Development
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tete – J-2 S, XRS-2200, RL-60, MB-60
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lidlid • Flight Engine Qualification, Certification
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p p – J-2, F-1, SSME, RS-68, RL-10, etc.
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to to • Flight Engine Acceptance
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.. – RS-68, SSME
• Major Engine Upgrades
– SSME Block Upgrades
• Re-development and Re-Use Potential
– LR-89 thrust chamber
Some examples of each are listed
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DATA Flight Engine
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Acceptance Test
Flight Stage
Qual. Test
• An On-going process of risk reduction (components, engines, stages)
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George, D.; “Chemical Propulsion: How To Make It Low Cost,” presented
at Highly Reusable Space Transportation Meeting, 25-27 July 1995.
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AA Survey of LOX/RP and LOX/LH Engine
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Y 2
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1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005
Completion Year
• Emdee, J., “A Survey of Development Test Programs for Hydrogen Oxygen Rocket Engines,” AIAA Paper No. 2001-0749.
• Emdee, J., “A Survey of Development Test Programs for LOX/Kerosene Liquid Rocket Engines,” AIAA Paper No. 2001-3985.
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Kerosene Booster Engines
H2 Booster Engines
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H2 Upper Stage Engines
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Test Firings
• Emdee, J., “A Survey of Development Test Programs for Hydrogen Oxygen Rocket Engines,” AIAA Paper No. 2001-0749.
• Emdee, J., “A Survey of Development Test Programs for LOX/Kerosene Liquid Rocket Engines,” AIAA Paper No. 2001-3985. 10