(DURIP) DEVELOPMENT OF A COHERENT ANTI-STOKES RAMAN SCATTERING SYSTEM FOR PLASMA-ASSISTED COMBUSTION DIAGNOSTICS
Abstract
The primary objective of the research that will be performed with the proposed equipment is to quantify the effect electronically excited O2 densities have on plasma-assisted combustion (PAC) of fuel-air mixtures. The requested equipment includes a continuous wave (cw), single-mode Ti:Sapphire laser, pumped with a solid-state laser; a nanosecond-pulsed dye laser equipped with a 532 nm Nd:YAG pump laser; a wavemeter that enables measuring frequencies from both pulsed and cw lasers in the range of 375-1100 nm; a 1 GHz oscilloscope, a boxcar signal processing system, and a passively stabilized optical table. The equipment will be integrated into a coherent anti-Stokes Raman scattering (CARS) system which, in combination with laser-induced fluorescence (LIF), will be used for selective O2 excitation, temperature measurements, and to spatially and temporally quantify O2 (b 1sigma-g +), O2 (1delta-g), O2 (X 3sigma-g -), and the fuel within a PAC system. The proposed instrumentation will provide capabilities necessary to further PAC research by allowing for quantification of the effect of electronically excited O2 states on plasma-assisted fuel-air combustion, in alignment with DOD’s mission and interests in hypersonic research. In addition to enhancing research capabilities, the equipment will help train a multidisciplinary group of students, scientists, and engineers in advanced diagnostic methods and strengthen student education in the areas of aerospace, plasma, and mechanical engineering.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2021
- Source ID
- FA95502010209
Entities
People
- Claudia Fajardo-hansford
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- Western Michigan University