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Spatially and Temporally Resolved Temperature and Species Concentration…

Award Information

Agency:
Department of Defense
Branch:
Air Force
Award ID:
86630
Program Year/Program:
2008 / SBIR
Agency Tracking Number:
F073-059-1004
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Spectral Energies, LLC
5100 Springfield Street Suite 301 Dayton, OH 45431-
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2008
Title: Spatially and Temporally Resolved Temperature and Species Concentration Measurements in High-Pressure Combustors using fs-CARS
Agency / Branch: DOD / USAF
Contract: FA8650-08-M-2837
Award Amount: $99,994.00
 

Abstract:

The objective of the proposed Phase-I research effort is to develop femtosecond (fs) laser-based coherent anti-Stokes Raman scattering (CARS) spectroscopy for providing quantitative high-speed (1-10 kHz) temperature and species concentration measurements in unsteady reacting flows. The initial frequency-spread dephasing rate of the Raman coherence induced by the ultrafast (~85 fs) Stokes and pump beams will be used to measure gas-phase temperature for high-pressure combustion. This initial frequency-spread dephasing rate of the Raman coherence is completely independent of local molecular collisions and depends only on the frequency spread of the Raman transitions at different temperatures. Single-shot CARS thermometry will be performed by obtaining time-resolved CARS spectra from chirped probe pulse. A simple theoretical model based on the assumption of impulsive excitation of Raman coherence will be developed to interpret and extract high-speed, single-shot temperature from the interaction of a chirped probe-pulse with the Raman coherence. During the Phase-I research effort measurements will be performed in laboratory flames. Successful implementation of the proposed technique will pave the way for the application of fs-CARS for high-speed temperature and species concentration measurements in high-pressure gas-turbine test rig and augmentor at Wright-Patterson Air Force Base (WPAFB) during the Phase-II research effort.

Principal Investigator:

Sivaram P. Gogineni
Project Manager
9372669570
spgogineni@gmail.com

Business Contact:

Terrence R. Meyer
Technical Director
9372865711
contact@spectralenergies.com
Small Business Information at Submission:

SPECTRAL ENERGIES, LLC
2513 Pierce Ave. Ames, IA 50010

EIN/Tax ID: 020780873
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No