Thermophoretic Effects on Seeding Particles in LDV Measurements of Flames

C. J. Sung; C. K. Law

doi:10.1080/00102209408935428

Thermophoretic Effects on Seeding Particles in LDV Measurements of Flames

C. J. Sung, C. K. Law

Research output: Contribution to journal › Article › peer-review

90 Scopus citations

Abstract

The motion of LDV seeding particles under the influence of viscous and thermophoretic forces in the rapidly-accelerating, high-temperature-gradient flame environment was studied via the counterflow premixed twin-flame configuration. Results demonstrate that thermophoretic force can induce significant lag between the fluid and.particle velocities in the active preheat zone of a flame, and suggest that caution should be exercised when interpreting LDV data obtained in this region. A thermophoretic velocity correction to the LDV-determined velocity, with known experimental or computational temperature profile, is proposed. Additional considerations of LDV diagnostics and its determination of laminar flame speed are also presented.

Original language	English (US)
Pages (from-to)	119-132
Number of pages	14
Journal	Combustion science and technology
Volume	99
Issue number	1-3
DOIs	https://doi.org/10.1080/00102209408935428
State	Published - Aug 1 1994
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering
Fuel Technology
Energy Engineering and Power Technology
General Physics and Astronomy

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10.1080/00102209408935428

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title = "Thermophoretic Effects on Seeding Particles in LDV Measurements of Flames",

abstract = "The motion of LDV seeding particles under the influence of viscous and thermophoretic forces in the rapidly-accelerating, high-temperature-gradient flame environment was studied via the counterflow premixed twin-flame configuration. Results demonstrate that thermophoretic force can induce significant lag between the fluid and.particle velocities in the active preheat zone of a flame, and suggest that caution should be exercised when interpreting LDV data obtained in this region. A thermophoretic velocity correction to the LDV-determined velocity, with known experimental or computational temperature profile, is proposed. Additional considerations of LDV diagnostics and its determination of laminar flame speed are also presented.",

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AB - The motion of LDV seeding particles under the influence of viscous and thermophoretic forces in the rapidly-accelerating, high-temperature-gradient flame environment was studied via the counterflow premixed twin-flame configuration. Results demonstrate that thermophoretic force can induce significant lag between the fluid and.particle velocities in the active preheat zone of a flame, and suggest that caution should be exercised when interpreting LDV data obtained in this region. A thermophoretic velocity correction to the LDV-determined velocity, with known experimental or computational temperature profile, is proposed. Additional considerations of LDV diagnostics and its determination of laminar flame speed are also presented.

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Thermophoretic Effects on Seeding Particles in LDV Measurements of Flames

Abstract

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