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A MULTI-POINT ARRAY LASER DOPPLER VELOCIMETER

Award Information

Agency:
National Science Foundation
Branch:
N/A
Award ID:
27392
Program Year/Program:
1995 / SBIR
Agency Tracking Number:
27392
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
NorthWest Research Associates, Inc.
P.O. Box 3027 Bellevue, WA 98009-
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1995
Title: A MULTI-POINT ARRAY LASER DOPPLER VELOCIMETER
Agency: NSF
Contract: N/A
Award Amount: $299,933.00
 

Abstract:

RESEARCHERS ARE DEVELOPING A MULTI-POINT LASER VELOCIMETER TO OBTAIN VELOCITIES AT A NUMBER OF POINTS, SIMULTANEOUSLY AND NON-INTRUSIVELY. THIS INSTRUMENTATION IS TO BE APPLIED TO TRANSPORT AND EXCHANGE IN SURFACE AND BOTTOM BOUNDARY LAYERS. HOWEVER, THE TECHNIQUE WILL BE APPLICABLE TO A WIDE RANGE OF FLOWS WHERE SIMULTANEOUS VELOCITY MEASUREMENTS ARE DESIRABLE. AT THE HEART OF THE INNOVATION IS A COMPLETELY NON-INTRUSIVE OPTICAL GEOMETRY THAT FORMS SEVERAL SAMPLE VOLUMES IN THE FLOW AND CORRESPONDING RECEIVING OPTICS TO DISTINGUISH THEIR IMAGES. SUCH A DEVICE IS NEEDED TO OBSERVE STRUCTURES IN NATURAL FLOWS AND TO DEAL WITH ISSUES SUCH AS FLOW STATIONARITY. THIS SIMULTANEOUS VIEW OF THE VELOCITY FIELD WILL REMOVE UNCERTAINTY IN THE INTERPRETATION OF VELOCITY PROFILE INFORMATION; E.G., THE VELOCITY SHEAR AND SHEAR STRESS, TURBULENT CHARACTERISTIC SCALES, AND ROUGHNESS LENGTHS. THE CONCEPT ALSO REMOVES THE NEED FOR MECHANICAL SCANNING DEVICES OR PROFILERS, BOTH OF WHICH YIELD NON-SIMULTANEOUS MEASUREMENTS. THE USE OF THIS INSTRUMENT FOR CHARACTERIZING THE CONCENTRATION AND TRANSPORT RATE OF SEDIMENTS IN THE BOTTOM BOUNDARY LAYER IS DESCRIBED. THE CONCEPT IS ALSO BENEFICIAL TO LABORATORY SCIENTISTS USING FLUMES, TOWING TANKS, OR WIND TUNNELS, IN THAT MULTI-POINT MEASUREMENTS PROVIDE ADDITIONAL INFORMATION ON FLOW STRUCTURE AND IMPROVE PRODUCTIVITY.

Principal Investigator:

Yogesh C Agrawal
2064539141

Business Contact:

Small Business Information at Submission:

Northwest Research Assoc Inc.
300 120th Ave Ne Bldg 7 #220 Po Box 3027 Bellevue, WA 98009

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No