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Multi Point Velocity, Density and Temperature Measurements using LITA

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNL04AB16P
Agency Tracking Number: 035949
Amount: $70,000.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: A2.06
Solicitation Number: N/A
Solicitation Year: 2003
Award Year: 2004
Award Start Date (Proposal Award Date): 2004-01-16
Award End Date (Contract End Date): 2004-07-19
Small Business Information
LA VERNE, CA 91750-5800
United States
DUNS: 19669
HUBZone Owned: No
Woman Owned: Yes
Socially and Economically Disadvantaged: No
Principal Investigator
 Thomas Sobota
 Principal Investigator
 (909) 392-3151
Business Contact
 Thomas Sobota
Title: President
Phone: (909) 392-3155
Research Institution

Laser induced thermal acoustics (LITA) is a nonintrusive, transient-grating optical technique that provides
simultaneous high-accuracy measurements of velocity, sound-speed, and thermal diffusivity among other
parameters. In a fluid of known composition, sound speed and thermal diffusivity are readily correlated to
temperature and density. Thus LITA provides a measurement of thermodynamic state. We are developing a
computer-controlled semi-portable LITA system for robust, long-baseline measurements. This novel system
automatically adjusts its own alignment to optimize accuracy. In prior work, LITA velocimetry was incorporated
into this system and demonstrated. System level requirements for multi point LITA measurements were identified
and system components, which as a whole, meet these requirements were designed or identified. In the proposed
effort, elements of the design will be separately validated and will then be incorporated into a complete system for
delivery to NASA in Phase II. By providing velocimetry and multi point capability the proposed system will beideal
for high-value ground-test experiments.

* Information listed above is at the time of submission. *

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