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ID 31649
file
title alternative
Effects of Rotation on Tubular Flames in an Axisymmetric Flow Field
creator
Yamamoto, Kazuhiro
Hirano, Toshisuke
subject
Premixed Combustion
Swirling Flow
Stability
Flammability Limit
Tubular Flame
Pressure Diffusion
Structure
NDC
Technology. Engineering
abstract
Using an axisymmetric swirl-type burner with eight inlet slits, the effects of rotation on the structure and characteristics of tubular flames have been investigated for lean methane/air mixtures.Results show that with increasing intensity of rotation, (1) the flame diameter increases and the thickness of the luminous zone decreases, (2) the fuel concentration at extinction decreases, i. e., the stable region expands, (3) the radial temperature distribution becomes an M-shaped profile, and the maximum temperature T_f increases while the local minimum temperature T_c at the center decreases,and (4) the values of T_f and T_c vary in a complicated manner in the axial direction. These results are almost consistent with those of our previous experiment, and hence, it is confirmed that the flame structure and the flame characteristics are affected by rotation. As for these phenomena, several mechanisms such as pressure diffusion, radiative heat loss, viscous energy dissipation, and energy recirculation including diffusion of radical species have been proposed. The present experimental results provide the first, basic information on this practically important phenomenon, i. e., the extension of flammable range by rotation.
journal title
日本機械学會論文集. B編
volume
Volume 62
issue
Issue 600
start page
3185
end page
3190
date of issued
1996-08-25
publisher
一般社団法人日本機械学会
issn
0387-5016
ncid
language
jpn
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
社団法人日本機械学会
本文データは学協会の許諾に基づきCiNiiから複製したものである
relation is version of URL
http://ci.nii.ac.jp/naid/110002403155
department
Graduate School of Engineering



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