A LASER BASED TRANSITION DETECTOR

Award Information
Agency:
National Aeronautics and Space Administration
Branch:
N/A
Amount:
$49,389.00
Award Year:
1988
Program:
SBIR
Phase:
Phase I
Contract:
N/A
Agency Tracking Number:
6842
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Complere Inc
Po Box 1697, Palo Alto, CA, 94302
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
N/A
Principal Investigator
 DR F K OWEN
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
ONE OF THE LARGEST SOURCES OF UNCERTAINTY IN PROPOSED HYPERSONIC TESTING OF THE NATIONAL AEROSPACE PLANE WILL BE THE MEASUREMENT OF THE EXTENT OF LAMINAR FLOW ON WIND TUNNELTEST MODELS WITH FREE AND FORCED TRANSITION. IN AN ATTEMPT TO ALLEVIATE THIS PROBLEM, A NOVEL CONCEPT FOR THE REMOTE DETECTION OF BOUNDARY-LAYER TRANSITION HAS BEEN PROPOSED. THIS LASER-BASED TURBULENT BURST DETECTOR WILL ENABLE NON-INTRUSIVE, MICROSCOPIC STUDIES OF THE ONSET AND EXTENT OF TRANSITION BY RAPIDLY SCANNING WIND TUNNEL MODEL BOUNDARYLAYERS. THE POTENTIAL OF THIS NEW INSTRUMENT WILL BE IN THECAPABILITY IT PROVIDES FOR THE RAPID MAPPING OF IRREGULAR TRANSITION PATTERNS WHICH OFTEN OCCUR ON COMPLICATED WIND-TUNNEL TEST MODELS. IT WILL ALSO REPLACE IMPRACTICALLYLARGE NUMBERS OF SURFACE GAGES WHICH WOULD BE REQUIRED FOR TRANSITION MEASUREMENT AND SO SUBSTANTIALLY REDUCE MODEL CONSTRUCTION COSTS AND WIND-TUNNEL TEST TIME.

* information listed above is at the time of submission.

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