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Three-Dimensional Density Imaging by Rayleigh Scattering

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9451-18-C-0208
Agency Tracking Number: F16A-T06-0013
Amount: $749,938.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: AF16-AT06
Solicitation Number: 2016.0
Solicitation Year: 2016
Award Year: 2018
Award Start Date (Proposal Award Date): 2017-11-01
Award End Date (Contract End Date): 2020-02-03
Small Business Information
22941 Mill Creek Drive
Laguna Hills, CA 92653
United States
DUNS: 188465819
HUBZone Owned: Yes
Woman Owned: Yes
Socially and Economically Disadvantaged: Yes
Principal Investigator
 Dr. Jacob George
 (949) 553-0688
Business Contact
 Cecil Hess
Phone: (949) 553-0688
Research Institution
 The Trustees of Princeton University
 Jeffrey Petsis
87 Prospect Avenue, 2nd Floor
Princeton, CA 08544-0036
United States

 (609) 258-6325
 Nonprofit College or University

A diagnostic is proposed for obtaining instantaneous three-dimensional volumetric distributions of density in a flow field at velocities ranging from subsonic to supersonic. Multiple Sheet Filtered Rayleigh Scattering (MSFRS) will be developed, which enables a series of two-dimensional images to be rapidly obtained making up a volumetric image while suppressing background scattering from wind tunnel walls and other surfaces. The approach will enable a spatial resolution of 3 mm for a measurement volume size of 100 mm x 50 mm x 12 mm and a temporal evolution of about 1 microsecond. A prototype system will be constructed and demonstrated in supersonic jets, a boundary layer, and wakes. Density measurements obtained with the system will be used in assessing the impact on a beam propagating through the flow, and the resulting wavefront will be compared to independent measurements of the same. Extension of the technique to larger measurement array sizes will also be explored.

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

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