Thermal and scalar dissipation rates of stretched cylindrical diffusion flame

被引：0

作者：

Iwate Univ., Dept. of Mechanical Engineering, Ueda 4-3-5, Morioka-shi, Iwate, 020-8551, Japan ^{[1
]}

机构：

[1] Iwate Univ., Dept. of Mechanical Engineering, Morioka-shi, Iwate, 020-8551

来源：

Nihon Kikai Gakkai Ronbunshu, B | / 804卷 / 1685-1693期

关键词：

Combustion; Diffusion flame; Flame curvature; Flame stretch; Scalar dissipation rate; Thermal dissipation rate;

D O I：

10.1299/kikaib.79.1685

中图分类号：

学科分类号：

摘要：

Structures of stretched cylindrical diffusion flame with large curvature were investigated experimentally. Temperature distributions of fuel-diluent mixture/air flames were measured. Fuel was diluted with diluent gases (N 2, Ar and He) in order to set the Lewis number Lẽ1. Fuel (Air) was supplied from inside (outside) of the cylindrical flame. Thermal dissipation rates were calculated from measured temperature distribution. In the case of Le=1, the scalar dissipation rate is proportional to the thermal dissipation rate. Therefore, the stoichiometric scalar dissipation rate was evaluated using the maximum value of the thermal dissipation rates obtained from each temperature distribution. Generally, it is known that the scalar dissipation rate of the counterflow flat diffusion flame increases as the flame stretch rate increases. However, in the case of the cylindrical diffusion flames, the scalar dissipation rate has a maximum value or decreases with the stretch rate. © 2013 The Japan Society of Mechanical Engineers.

引用

页码：1685 / 1693

页数：8

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