Scaling of heights and widths of laminar jet diffusion flames under subatmospheric pressures

2019 9th International Conference on Future Environment and Energy

生态环境科学;能源学

Ma, Pingchuan^1 ; Li, Haihang^2 ; Wang, Jian^1

State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, China^1

China Jiliang University, China^2

关键词: Flame height;    Froude scaling;    High pressure;    Hydrocarbon fuel;    Laminar jet diffusion flames;    Pressure increase;    Soot formations;    Subatmospheric pressures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/257/1/012041/pdf
DOI  :  10.1088/1755-1315/257/1/012041

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The luminous shapes were presented to examine the scaling of flame heights and widths of laminar jet diffusion flames of burning methane, ethylene, and propane in a subatmospheric pressure chamber. All the flames examined were stable with no soot emitting. The Reynolds scaling mentioned below was generally suitable for the three hydrocarbon fuels although slopes were becoming steeper as soot formation elongated the flame height at high Re under high pressure. The regions of Froude number where buoyancy is dominant or buoyancy is unimportant were demonstrated by following Reynolds-Froude height scaling of Altenkirch's model. In Froude scaling of width, the unchanged slopes between dimensionless width and Fr with pressure increase indicated the good linearity of flame width changing on pressure. Finally, regression of the form for flame width was also considered.