Forward-illumination light-extinction technique for soot measurement
Applied Optics, Vol. 45, Issue 9, pp. 2046-2057 (2006)
http://dx.doi.org/10.1364/AO.45.002046
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Abstract
A forward-illumination light-extinction (FILE) soot volume fraction measurement technique was developed and tested. By using a camera and a point light source in front of the flame and a diffuser behind the flame, with this technique one can achieve a two-dimensional soot concentration measurement with only one window when one is studying confined combustion. The line-of-sight quantitative soot volume fraction is obtained by calculation of the reflected light intensity with or without the presence of soot cloud. Verification of this technique was accomplished by measurement of an axisymmetric ethylene diffusion flame. The field distribution obtained by Abel inversion is presented and matched well with previous point measurements. The FILE technique has high time resolution when a high-speed camera and a copper vapor laser are adopted. All these advantages of FILE make it suitable for line-of-sight integrated, two-dimensional soot distribution of transient combustion, e.g., in the case of in-cylinder Diesel combustion.
© 2006 Optical Society of America
OCIS Codes
(110.0110) Imaging systems : Imaging systems
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: June 1, 2005
Revised Manuscript: October 1, 2005
Manuscript Accepted: October 11, 2005
Citation
Yi Xu and Chia-fon F. Lee, "Forward-illumination light-extinction technique for soot measurement," Appl. Opt. 45, 2046-2057 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-9-2046
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