Non-Axisymmetric Infrared Plume Tomography for Rocket Plume Species and Temperature Distributions

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NAS13-03017
Agency Tracking Number: 020056
Amount: $99,758.00
Phase: Phase I
Program: STTR
Awards Year: 2003
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Sierra Engineering Inc.
603 E. Robinson Suite 7, Carson City, NV, 89701
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jeffrey Muss
 () -
Business Contact
 Margo Hornung
Title: Business Official
Phone: (775) 885-8483
Research Institution
 Cal Poly State University Foundation
 Michael Fish
 1 Grand Avenue
San Luis Obispo, CA, 93407
 (805) 756-2982
 Nonprofit college or university
Spatial uniformity within combustion devices, especially circumferential, is extremely important to the reliability and durability of a liquid rocket engine. Conventional combustion diagnostics, e.g. pressure and thrust, characterize global engine behavior, but provide no direct information about thermal and species distributions across the engine. Sierra Engineering has shown that exhaust plume measurements can provide many of these details with sensitivity much greater than conventional diagnostics. We have developed a turn-key infrared emission-absorption spectroscopy system capable of planar measurements across a rocket exhaust plume. Data reduction from this single spectrometer system requires that the flow field be assumed axisymmetric. However, simultaneous measurements from three spectrometers allow complete resolution of non-axisymmetric flow fields. The necessary tomographic data reconstruction techniques are commonly employed in the medical field for CAT-scan analyses. The subject proposal adapts the current Sierra emission-absorption plume diagnostic to a compact fiber-optic system suitable for deployment under realistic rocket test situations. The fiber-optic system enables the integration of three sensor systems into a single test setup, thereby permitting accurate characterization of non-axisymmetric flow fields.

* information listed above is at the time of submission.

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