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Stability of diffusion flame formed in a laminar flat plate boundary layer. Effect of fuel dilution; Soryu heiban kyokai sonai ni keiseisareru kakusan kaen no anteisei. Nenryo kishaku no eikyo

Journal Article:

Abstract

A stability limit of the diffusion flame with fuel injection from a porous wall in a laminar flat plate boundary layer is measured as functions of fuel (CH4) concentration of CH4/N2 injectant mixture ({chi}) and its injection velocity (v). The free stream velocity (U{infinity}) is set as 0.6 m/s. The thermal condition at the wall is controlled by setting temperature at the upstream end of the porous wall as a reference temperature. When v >20 mm/s, the flame becomes unstable with the separation of leading flame edge with decreasing {chi}. The value of {chi} at the stability limit is constant without regard to v as long as the wall temperature is kept constant. As the wall temperature is decreased the value of {chi} increases. The separation is supposed to take place as a result of the limit of the reaction rate. When v <20 mm/s, the flame becomes unstable with the oscillation. The value of {chi} at the stability limit increases drastically with decreasing v. The oscillation takes place mainly due to the repeat of the extinction due to heat loss to the wall and the flame propagation in the combustible layer. 10 refs., 8 figs., 1 tab.
Authors:
Takeuchi, M; [1]  Ueda, T; Mizumoto, M; [2]  Amari, T [3] 
  1. National Institute for Resources and Environment, Tsukuba (Japan)
  2. Keio University, Tokyo (Japan). Faculty of Science and Technology
  3. Keio University, Tokyo (Japan)
Publication Date:
Oct 25, 1998
Product Type:
Journal Article
Reference Number:
SCA: 400800; 420400; 034000; PA: JP-99:0G0536; EDB-99:055951; SN: 99002096741
Resource Relation:
Journal Name: Nippon Kikai Gakkai Ronbunshu. B Hen (Transactions of the Japan Society of Mechanical Engineers. Part B); Journal Volume: 64; Journal Issue: 626; Other Information: PBD: 25 Oct 1998
Subject:
40 CHEMISTRY; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 03 NATURAL GAS; FLAMES; DIFFUSION; STABILITY; FUEL GAS; BOUNDARY LAYERS; DILUTION; COMBUSTION; METHANE; LAMINAR FLOW; WALLS; CONCENTRATION RATIO; VELOCITY; FUEL INJECTION SYSTEMS; TEMPERATURE DEPENDENCE; CHEMICAL REACTION KINETICS; OSCILLATIONS; HEAT LOSSES; FLAME PROPAGATION
OSTI ID:
344113
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: NKGBDD; ISSN 0387-5016; TRN: JN99G0536
Submitting Site:
NEDO
Size:
pp. 345-350
Announcement Date:

Journal Article:

Citation Formats

Takeuchi, M, Ueda, T, Mizumoto, M, and Amari, T. Stability of diffusion flame formed in a laminar flat plate boundary layer. Effect of fuel dilution; Soryu heiban kyokai sonai ni keiseisareru kakusan kaen no anteisei. Nenryo kishaku no eikyo. Japan: N. p., 1998. Web.
Takeuchi, M, Ueda, T, Mizumoto, M, & Amari, T. Stability of diffusion flame formed in a laminar flat plate boundary layer. Effect of fuel dilution; Soryu heiban kyokai sonai ni keiseisareru kakusan kaen no anteisei. Nenryo kishaku no eikyo. Japan.
Takeuchi, M, Ueda, T, Mizumoto, M, and Amari, T. 1998. "Stability of diffusion flame formed in a laminar flat plate boundary layer. Effect of fuel dilution; Soryu heiban kyokai sonai ni keiseisareru kakusan kaen no anteisei. Nenryo kishaku no eikyo." Japan.
@misc{etde_344113,
title = {Stability of diffusion flame formed in a laminar flat plate boundary layer. Effect of fuel dilution; Soryu heiban kyokai sonai ni keiseisareru kakusan kaen no anteisei. Nenryo kishaku no eikyo}
author = {Takeuchi, M, Ueda, T, Mizumoto, M, and Amari, T}
abstractNote = {A stability limit of the diffusion flame with fuel injection from a porous wall in a laminar flat plate boundary layer is measured as functions of fuel (CH4) concentration of CH4/N2 injectant mixture ({chi}) and its injection velocity (v). The free stream velocity (U{infinity}) is set as 0.6 m/s. The thermal condition at the wall is controlled by setting temperature at the upstream end of the porous wall as a reference temperature. When v >20 mm/s, the flame becomes unstable with the separation of leading flame edge with decreasing {chi}. The value of {chi} at the stability limit is constant without regard to v as long as the wall temperature is kept constant. As the wall temperature is decreased the value of {chi} increases. The separation is supposed to take place as a result of the limit of the reaction rate. When v <20 mm/s, the flame becomes unstable with the oscillation. The value of {chi} at the stability limit increases drastically with decreasing v. The oscillation takes place mainly due to the repeat of the extinction due to heat loss to the wall and the flame propagation in the combustible layer. 10 refs., 8 figs., 1 tab.}
journal = {Nippon Kikai Gakkai Ronbunshu. B Hen (Transactions of the Japan Society of Mechanical Engineers. Part B)}
issue = {626}
volume = {64}
journal type = {AC}
place = {Japan}
year = {1998}
month = {Oct}
}