V-22 Three-Dimensional (3D) Downwash Measurement

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-09-C-0254
Agency Tracking Number: N091-029-1217
Amount: $80,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2009
Solicitation Topic Code: N091-029
Solicitation Number: 2009.1
Small Business Information
Southwest Sciences, Inc.
1570 Pacheco Street, Suite E-11, Santa Fe, NM, 87505
DUNS: 153579891
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David Hovde
 Principal Research Scient
 (513) 272-1323
 dchovde@swsciences.com
Business Contact
 Alan Stanton
Title: Principal Research Scient
Phone: (505) 984-1322
Email: astanton@swsciences.com
Research Institution
N/A
Abstract
The Navy requires measurements of the wake field of helicopters in the vicinity of carrier ships to determine the safe operating envelope for the V-22 and to verify the accuracy of models obtained by computational fluid dynamics. This Phase I SBIR project will examine the feasibility of a laser-based remote sensing technique for recording three dimensional wind fields with high spatial and temporal resolution. A laser beam shines across the flight deck, where some of the light scatters from aerosol particles in the air to a group of at least three optical detectors placed around the measurement region. The motion of the particles encodes information about the wind velocity as a change in frequency of the scattered light. An innovative optical filter converts the frequency information into a signal that is proportional to velocity. The optical filter is simple, inexpensive, and has a wide acceptance angle, permitting the use of fast optics to collect the most light possible. The high signal to noise ratio obtained by this technique allows measurements from stand-off distances of over twenty meters using low-power lasers. Other system features include low electrical power and compact transmitter and receiver assemblies that should facilitate onboard tests.

* information listed above is at the time of submission.

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