Measurement Techniques for High-Pressure, Liquid-Fueled Combustors with High Soot Loading

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-08-M-2838
Agency Tracking Number: F073-059-1212
Amount: $99,949.00
Phase: Phase I
Program: SBIR
Awards Year: 2008
Solitcitation Year: 2007
Solitcitation Topic Code: AF073-059
Solitcitation Number: 2007.3
Small Business Information
2766 Indian Ripple Rd, Dayton, OH, 45440
Duns: 884812025
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Sukesh Roy
 Senior Engineer
 (937) 902-6546
Business Contact
 Larry Goss
Title: President
Phone: (937) 429-4980
Research Institution
The primary objective of this Phase-I research effort is to build an ultraviolet (UV) hyperspectral sensor at ~310 nm to perform spatially resolved temperature and OH concentration measurements based on multi-line laser-induced fluorescence (LIF) of OH molecule in reacting flows. The proof-of-the-concept demonstration measurements will be performed in an atmospheric-pressure, near-adiabatic H2-air Hencken burner for various equivalence ratios. The potential of two different concepts of generating UV light using hyperspectral sources will be evaluated. These are: (1) generating UV light by sum-frequency mixing of 5W 532 nm light with a high-power hyperspectral source at ~763 nm in a nonlinear crystal and (2) development of an UV hyperspectral source based on native ultraviolet gain, e.g., using quadrupled Nd:YVO4-pumped Ce3+:LiCaAlF6 or Ce3+:LiLuF4 crystals which can provide broadband gain in the 280-333 nm range. High-bandwidth LIF measurements based on continuous-wave (CW) lasers is limited by the low power output of typical distributed feedback (DFB) diode-lasers used for their construction. Hyperspectral sources will allow generating high-power CW laser-light at the desired frequency, i.e., either at ~763 nm or ~310 nm. This feasibility study will pave the way for designing the optimum UV source for implementation in a high-pressure test-rig at WPAFB during the Phase-II research effort.

* information listed above is at the time of submission.

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