Nonintrusive Droplet Characterization System

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 19815
Amount: $543,323.00
Phase: Phase II
Program: SBIR
Awards Year: 1994
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
18006 Skypark Circle #108, Irvine, CA, 92714
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Cecil F. Hess, Ph.d.
 (714) 553-0688
Business Contact
Phone: () -
Research Institution
This proposal describes a program to develop a system to measure the spatial distribution of droplet size, liquid water content, and the droplet velocity in engine test cells. The twelve foot duct diameter rules out most light scattering and imaging techniques. The liquid water content of up to 5.6 g/m3 dictates that the probe volume must be no larger than about 10E8 micron3 resulting in a narrow waist with a limited Rayleigh range. To avoid the presence of potentially harmful objects in the inlet path, the proposed system must have a long range with the transmitter and the receiver remaining outside the specified 12 foot duct. The proposed system includes a laser sheet that can be focused to the required waist dimensions anywhere along the duct. The light scattered by droplets crossing the center of the focused sheet is collected by a receiver that tracks the waist position. Several schemes to locate the center of the laser sheet and avoid Gaussian ambiguity will be evaluated. Phase I will include analytical and experimental research that define optimum strategies that will be tested on a breadboard under controlled conditions.

* information listed above is at the time of submission.

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