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Pattern Factor Control Based on Fuel Modulation and Passive Optical Sensors

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-06-M-2643
Agency Tracking Number: F061-167-0126
Amount: $99,995.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: AF06-167
Solicitation Number: 2006.1
Timeline
Solicitation Year: 2006
Award Year: 2006
Award Start Date (Proposal Award Date): 2006-04-07
Award End Date (Contract End Date): 2007-01-07
Small Business Information
4 Fourth Avenue
Burlington, MA 01803
United States
DUNS: 047627732
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Jamine Lee
 Principal Investigator
 (781) 273-4770
 jamine@spectral.com
Business Contact
 Fritz Bien
Title: President
Phone: (781) 273-4770
Email: fritz@spectral.com
Research Institution
N/A
Abstract

The proposed research addresses the design and testing of a flight-worthy combustion pattern factor control system, suitable for integration into legacy aircraft. Operating point control would be achieved using fuel modulation, passive optical sensors, and the FADEC to identify aberrant fuel injectors and trim fuel flow to reduce overall pattern factor. Miniature sensors, which would be integrated into existing engine components, would collect radiation emitted by the hot gas and process multiple-spectral bands to produce a moderate frequency (order 100 HZ), intensity-independent control signal. Multiple sensors, distributed around the annulus would provide redundant, overlapping information on local and global combustion properties. Logic in the FADEC would identify an association between a specific fuel injector and increased temperature pattern factor, and modify the fuel flow accordingly. In Phase I we will perform a detailed engineering evaluation of the spectral, spatial, and temporal information available for sensor operation, and identify and rank candidate sensor and control schemes. In Phase II, we will use a flexible prototype to make measurements of the functional relationships between fuel modulation, pattern factor, and sensor signals in a multi-injector high-pressure combustor. Control relationship(s) will be demonstrated in open loop tests.

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

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