Rotating and Modulated Rotating States of Cellular Flames
作者:
M. GORMAN,
C. F. HAMILL,
M. EL-HADI,
K. A. ROBBINS,
期刊:
Combustion Science and Technology
(Taylor Available online 1994)
卷期:
Volume 98,
issue 1-3
页码: 25-35
ISSN:0010-2202
年代: 1994
DOI:10.1080/00102209408935394
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Ordered states of cellular flames on circular porous plug burners consist of concentric rings of cells. At certain values of the flow rate and equivalence ratio a transition is made to a state in which entire rings of ceils rotate. The direction of rotation depends only on the initial conditions. Our observations of rotating cellular flames include a single rotating ring, an outer ring rotating about a single inner cell, a rotating inner ring surrounded by a fixed outer ring, and two corotating or counterrotaling concentric rings. A rotating ring of cells can also make a transition to a modulated rotating state in which the shapes of the cells and the speed of rotation periodically change. In another rotating mode, a single central cell takes the shape of a spiral which rotates inside a fixed outer ring of cells. The physical characteristics of these modes are described and comparisons with relevant theoretical studies are made.
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