NONINTRUSIVE FAST RESPONSE OXYGEN MONITORING SYSTEM FOR HIGHTEMPERATURE FLOWS

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$496,718.00
Award Year:
1990
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
10532
Agency Tracking Number:
10532
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1570 Pacheco St #e-11, Santa Fe, NM, 87501
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr Alan C Stanton
() -
Business Contact:
() -
Research Institute:
n/a
Abstract
A FAST-RESPONSE METHOD FOR MEASUREMENT OF MOLECULAR OXYGEN CONCENTRATIONS IN HIGH TEMPERATURE FLOWS IS NEEDED FOR WIND TUNNEL RESEARCH ON HYPERSONIC AIR-BREATHING ENGINES AS WELL AS OTHER APPLICATIONS IN COMBUSTION RESEARCH OR CONTROL. THE PROPOSED INNOVATION WILL UTILIZE INEXPENSIVE ROOM TEMPERATURE LASER DIODES TO MEASURE ABSORPTION BY OXYGEN AT NEAR-INFRARED WAVELENGTHS. THESE LASERS WILL BE USED IN COMBINATION WITH HIGH FREQUENCY FM DETECTION TECHNIQUES TO DEVELOP AN OXYGEN MONITORING METHOD WITH HIGH SENSITIVITY, WIDE DYNAMIC RANGE, AND THE CAPABILITY FOR EXTREMELY FAST TIME RESPONSE. AN IMPORTANT CHARACTERISTIC OF THIS INNOVATION IS THAT THE MEASUREMENTS ARE NONINTRUSIVE, AS CONTRASTED WITH ELECTROCHEMICAL METHODSWHERE GASES MUST BE TRANSPORTED INTO A SENSOR CHAMBER. IN COMPARISON WITH OTHER POTENTIAL OPTICALLY-BASED METHODS FOR MEASURING OXYGEN CONCENTRATIONS, THE PROPOSED APPROACH USES EXCEPTIONALLY RELIABLE AND INEXPENSIVE LASER SOURCES WHICH CAN READILY BE COMBINED WITH FIBER OPTICS FOR MULTI-POINT MONITORING. THE FEASIBILITY OF THE TECHNIQUE WILL BE DEMONSTRATED IN PHASE I BY MEASUREMENTS IN A ROOM TEMPERATURE ABSORPTION CELL AND IN THE POST-FLAME GASES OF A METHANE-OXYGEN FLAME.

* information listed above is at the time of submission.

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