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TECHNICAL PAPERS: Fuels and Combustion Technology

A Mathematical Model for Schlieren and Shadowgraph Images of Transient Expanding Spherical Thin Flames

[+] Author and Article Information
Farzan Parsinejad, Matyas Matlo, Mohamad Metghalchi

Mechanical, Industrial and Manufacturing Engineering Department, Northeastern University, 334 Snell Engineering Center, Boston, MA 02115

J. Eng. Gas Turbines Power 126(2), 241-247 (Jun 07, 2004) (7 pages) doi:10.1115/1.1688368 History: Received November 01, 2001; Revised July 01, 2002; Online June 07, 2004
Copyright © 2004 by ASME
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References

Figures

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Schematic diagram of optical system, 1
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Ray tracing of refraction through a spherical flame
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The scattering angle χ as a function of impact parameter (b/R)
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The scattering angle χ as a function of impact parameter (b/R) close to the critical point
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The deflection of light ray passing through a spherical flame with total displacement y,1
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The deflection of light ray passing through a spherical flame when y>R,1
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Shadowgraph relative intensity versus normalized y/R
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Ray tracing of Schlieren system, 1
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Scattering angle and the portion of rays, which by passes the knife edge for Schlieren system
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Intensity of Schlieren image versus normalized displacement y/R
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Shadowgraph image of methane/air flame 10 ms after ignition
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Schlieren image of methane/air flame 30 ms. after ignition
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Shadowgraph chronology of methane/air flame turning into cellular flame

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