Intracavity laser absorption spectroscopy of flames: concentration measurements of intermediate species

Sergey Cheskis; Igor Derzy; Vladimir A. Lozovsky; Alexander A. Kachanov; Frederic Stoeckel

doi:10.1117/12.279761

21 November 1997 Intracavity laser absorption spectroscopy of flames: concentration measurements of intermediate species

Sergey Cheskis, Igor Derzy, Vladimir A. Lozovsky, Alexander A. Kachanov, Frederic Stoeckel

Author Affiliations +

Proceedings Volume 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III; (1997) https://doi.org/10.1117/12.279761
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Intracavity laser absorption spectroscopy was used to study concentration profiles of several radicals in flames. Very high sensitivity of ICLAS enables quantitative measurements of absolute concentrations of atoms and radicals in flames. MOst of the experiments were done with a flat flame burner placed inside the cavity of a broad band dye laser. The spectra of HCO radicals and CH₂ radical, in the singlet electronic state were measured with a high signal-to-noise ratio at different position above the burner.In this work we report the measurement of the concentration profiles of HCO and CH₂ radical sin methane/air flame. The spectra of these two radicals can be measured simultaneously which is advantageous in combustion diagnostics. Cavity ring-down laser spectroscopy was used to measure the OH concentration profiles of the HCO and OH radicals are in reasonable agreement with computer simulation results. However, a rough estimation of the CH₂ absolute concentration indicates a much higher concentration than that which can be predicted based on the model calculation.

Citation Download Citation

Sergey Cheskis, Igor Derzy, Vladimir A. Lozovsky, Alexander A. Kachanov, and Frederic Stoeckel "Intracavity laser absorption spectroscopy of flames: concentration measurements of intermediate species", Proc. SPIE 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III, (21 November 1997); https://doi.org/10.1117/12.279761

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available