Flame structure and stabilization of lean-premixed sprays in a counterflow with low-volatility fuel

被引：22

作者：

Mikami, Masato ^{[1
]}

Mizuta, Yoshimi ^{[1
]}

Tsuchida, Yuki ^{[1
]}

Kojima, Naoya ^{[1
]}

机构：

[1] Yamaguchi Univ, Dept Mech Engn, Yamaguchi 7558611, Japan

来源：

PROCEEDINGS OF THE COMBUSTION INSTITUTE | 2009年 / 32卷

关键词：

Spray combustion; Premixed spray; Flame structure; Flame stabilization; Counterflow; DIFFUSION FLAMES; POLYDISPERSE SPRAYS; COMBUSTION; MICROGRAVITY; PROPAGATION; EXTINCTION; TRANSPORT;

D O I：

10.1016/j.proci.2008.08.009

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An experimental study was performed on the combustion of lean-premixed spays in a counterflow. n-Decane was used as a liquid fuel with low volatility. The flame Structure and stabilization were discussed based on the flame-spread mechanism of a droplet array with a low-volatility fuel. The spray flame consisted of a blue region and a yellow huminous region. The flame spread among droplets and group-flame formation through the droplet interaction were observed on the premixed spray side, while envelope flames were also observed on the opposing airflow side. The blue-flame region consisted of premixed flames propagating in the mixture layer around each droplet, the envelope diffusion flames around each droplet, the lower parts of the group diffusion flame Surrounding each droplet cluster, and the envelope flame around droplets passing through the group flame. The flame was stabilized within a specific range of the mean droplet diameter via a balance between the droplet velocity and the flame-spread rate of the premixed spray. (C) 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

引用

页码：2223 / 2230

页数：8

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