Isolation of Buoyancy Effects in Jet Diffusion Flame Experiments
作者:
R. W. DAVIS,
E. F. MOORE,
R. J. SANTORO,
J. R. NESS,
期刊:
Combustion Science and Technology
(Taylor Available online 1990)
卷期:
Volume 73,
issue 4-6
页码: 625-635
ISSN:0010-2202
年代: 1990
DOI:10.1080/00102209008951674
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Buoyancy is an important factor in the dynamic behavior of jet diffusion flames. In order to determine the exact role that buoyancy plays, a simple procedure is described for varying in isolation the relative buoyancy force in stationary laboratory jet diffusion flame experiments. This procedure, which is derived from a theoretical model of these flames, merely requires that background pressure be varied while maintaining constant mass flows of fuel and oxidizer into the burner. It is shown that the sole result of these pressure variations in the theoretical model is that the effective gravitational acceleration acting upon the flame varies as the square of the pressure. Comparisons are made between the structure of a low speed laboratory methane/air flame at various pressures and the results of a direct numerical simulation of the same flame with various gravitational accelerations. Similar evolutions in flame structure are observed in both cases.
点击下载:
PDF (558KB)
返 回