Accession Number : ADA231935


Title :   Engine Throat/Nozzle Optics for Plume Spectroscopy


Descriptive Note : Final rept. 23 Mar 1990-23 Jan 1991


Corporate Author : AEROJET PROPULSION DIV SACRAMENTO CA


Personal Author(s) : Bickford, R L ; Duncan, D B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a231935.pdf


Report Date : 01 Feb 1991


Pagination or Media Count : 89


Abstract : The Task 2.0, Engine Throat/Nozzle Optics for Plume Spectroscopy, effort was performed under the NASA LeRC Development of Life Prediction Capabilities for Liquid Propellant Rocket Engines program. This Task produced the engineering design of an optical probe to enable spectroscopy measurements within the SSME main chamber. The probe mounts on the SSME nozzle aft manifold and collects light emitted from the throat plane and chamber. Light collected by the probe is transferred to a spectrometer through a fiberoptic cable. The design analyses indicate that the probe will function throughout the engine operating cycle and is suitable for both test stand and flight operations. By detecting metallic emissions that are indicative of component degradation or incipient failure, engine shutdown can be initiated before catastrophic failure. This capability will protect valuable test stand hardware and provide enhanced mission safety.


Descriptors :   *FIBER OPTICS , METALS , MEASUREMENT , OPTICAL EQUIPMENT , OPTICS , PROBES , SPECTROSCOPY , CABLES , FAILURE , TEST EQUIPMENT , ENGINEERING , FLIGHT , MISSIONS , SAFETY , ENGINES , NOZZLES , MOUNTS , MANIFOLDS(ENGINES) , PLUMES , CATASTROPHIC CONDITIONS , CHAMBERS , SPECTROMETERS , TEST STANDS , THROAT , EMISSION


Subject Categories : Liquid Propellant Rocket Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE