Forward-illumination light-extinction technique for soot measurement

Journal Article · Mon Mar 20 04:00:00 EST 2006 · Applied Optics

DOI:https://doi.org/10.1364/AO.45.0· OSTI ID:20779285

Yi, Xu; Lee, Chiafon F

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.

• OSTI ID: 20779285
• Journal Information: Applied Optics, Journal Name: Applied Optics Journal Issue: 9 Vol. 45; ISSN 0003-6935; ISSN APOPAI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AXIAL SYMMETRY
CAMERAS
CLOUDS
COMBUSTION
DIFFUSERS
ETHYLENE
FLAMES
ILLUMINANCE
IMAGES
LIGHT SOURCES
MEASURING METHODS
METAL VAPOR LASERS
SOOT
SPATIAL DISTRIBUTION
TIME RESOLUTION
TWO-DIMENSIONAL CALCULATIONS
VERIFICATION
VISIBLE RADIATION