Hydroxyl Tagging Velocimetry for Rocket Plumes

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$100,000.00
Award Year:
2008
Program:
STTR
Phase:
Phase I
Contract:
NNX08CD52P
Award Id:
87896
Agency Tracking Number:
070025
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
8 Chrysler, Irvine, CA, 92618
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
188465819
Principal Investigator:
Thomas Jenkins
Principal Investigator
(949) 553-0688
tjenkins@metrolaserinc.com
Business Contact:
Christina Arnold
Director of Administration
(949) 553-0688
Research Institute:
Vanderbilt University

110 21st Avenue South, Baker Bldg. #937
Nashville, TN, 37203 2641
(615) 322-3979
Nonprofit college or university
Abstract
To address the need for non-intrusive sensors for rocket plume properties, we propose a laser-based velocity diagnostic that does not require seeding, works in high or low temperature flows, and can be used over a broad range of velocities. Hydroxyl tagging velocimetry (HTV) "writes" a line of OH molecules into the flow and interrogates them after a short delay to determine the velocity. Since the markers are molecules, the method measures the gas velocity directly, avoiding errors due to particle drag associated with seeded techniques. The only requirement is that H2O molecules must be present in the flow, which is easily met by most rocket plume applications. Because OH molecules survive at high temperatures for appreciable lifetimes, it is anticipated that the HTV technique will work in even the highest temperature rocket plumes. The proposed diagnostic will provide measurements not obtainable by current methods, and will enable experimental data that can be used for validating computer models for rocket engine performance predictions.

* information listed above is at the time of submission.

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