Application of coherent anti-stokes raman scattering thermometry in turbulent and laminar flames

Satija, Aman

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https://hdl.handle.net/2142/100845 Copy

Description

Title

Application of coherent anti-stokes raman scattering thermometry in turbulent and laminar flames

Author(s)

Satija, Aman

Contributor(s)

• Lucht, Robert P.
• Masri, Assaad R
• Gore, Jay P
• Thomas, Levi Michael
• Lowe, Albyn
• Han, Dong
• Chang, Ziqiao

Issue Date

2018-06-19

Keyword(s)

Instrument/Technique Demonstration

Abstract

Coherent anti-Stokes Raman scattering (CARS) is a non-linear spectroscopic combustion diagnostic technique used for measurement of temperature and species concentration. Broadband CARS spectra can be acquired with a single laser shot with high spatial and temporal resolution. We present two distinct applications of a nanosecond dual-pump vibrational CARS system. The first experiment aimed to study the effect of simulated exhaust-gas-recirculation, via addition of CO2 to the fuel stream, on the flame structure of lean CH4-air pilot-assisted turbulent premixed flames. For this experiment over 20,000 single-shot spectra were acquired and spectrally fitted to develop a detailed temperature map of the flame flow-field. In the second experiment, laminar flames with varying soot loading were stabilized over a “Yale burner”. This burner, in the combustion community, is a canonical system for the development of soot models. The principal challenge in this experiment was obtaining a CARS signal with an adequate signal to noise ratio in the presence of strong soot-emission background. Our measurements in both experiments will serve as benchmark data for the development of combustion computational models.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/100845

DOI

10.15278/isms.2018.TI05

Copyright and License Information

Copyright 2018 Aman Satija

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