Investigation of Combustion Instability in Augmentors Using High-Speed PIV and PLIF

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-08-C-2849
Agency Tracking Number: F071-173-0072
Amount: $1,148,930.00
Phase: Phase II
Program: SBIR
Awards Year: 2008
Solicitation Year: 2007
Solicitation Topic Code: AF071-173
Solicitation Number: 2007.1
Small Business Information
2513 Pierce Ave., Ames, IA, 50010
DUNS: 782766831
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Sivaram Gogineni
 Senior Research Scientist
 (937) 266-9570
Business Contact
 Terrence Meyer
Title: Technical Director
Phone: (937) 286-5711
Research Institution
The objective of this Phase-II effort is to build and deliver a high-speed laser system for performing particle-image velocimetry (PIV) and planar laser-induced fluorescence (PLIF) of OH at rates of 5 to 10 kHz in augmentor test facilities. This state-of-the-art laser system will allow velocity and 2-D flame radical measurements for understanding the complex spatio-temporal development of instability modes leading to local and global flame extinction. Acquisition of PIV and PLIF images at 5 to 10 kHz will be sufficient to capture the interaction of small- and large-scale structures responsible for initiating or sustaining most of the phenomena that affects augmentor stability. Initial demonstration measurements will be performed in a laboratory turbulent flame where the interaction of vortices (i.e., the instabilities) can be controlled in systematic way for optimizing system performance. Data from these measurements will be used to demonstrate the ability to track instability modes and their spatio-temporal interaction. These laboratory experiments will be followed by the installation of the system at WPAFB for performing measurements under various augmentor conditions dictated by AFRL scientists. Successful implementation of this effort will pave the way for AFRL scientists to address instabilities in other combustors with the state-of-the-art laser diagnostic system.

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

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