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Ignition and Flame Propagation in Combustible Mixtures

可燃混合物中的点燃和火焰传播

基本信息

批准号：
09045046
负责人：
HIRANO Toshisuke
金额：
$ 1.15万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

To promote a fundamental study of combustion safety on ignition and flame propagation in combustible mixtures, the academic exchange was done between the University of Tokyo and Warsaw University of Technology. The study was made by exchanging the knowledge and technology of the participant researchers during visiting each other. Visits of 4 researchers have been supported by this Grant-in-Aid for Scientific Research.The exchange of knowledge and technology was mainly focused on the combustion mechanisms of combustible particle clouds. A lot of data concerning this study were provided from the participant researchers of both universities.From the University of Tokyo : Data on the propagating mechanism and structure of the flame propagating through combustible particle clouds (Stearic acid, 1-Octadecanol, Metal particle).From Warsaw University of Technology : Data on ignition phenomena and structure of the flame propagating through combustible particle clouds (mainly 1-Octadecanol).As a result, the following points were elucidated.- The structure of a flame propagation through combustible particle (Flame structure, Thickness of preheat zone, Thickness of reaction zone)- The propagating mechanism of a flame propagation through combustible particle clouds (Mechanism of heat transfer, Flame propagating velocity)From these results, it is known that the thickness of such kind of heterogeneous flame propagating through combustible particle clouds is much thicker than that of the flame propagating through homogeneous combustible premixed mixture, and the propagating velocity of the heterogeneous flame becomes much slower. This kind of knowledge is very important to properly understand the combustion phenomena in a heterogeneous system. This program could promote the study of heterogeneous combustion and also academic exchange between Japan and Poland.

为了促进可燃混合物中点火和火焰传播的燃烧安全性的基础研究，东京大学和华沙理工大学之间进行了学术交流。该研究是通过参与研究人员相互访问期间交流知识和技术而完成的。本次科研资助项目资助了4名研究人员来访。此次知识和技术交流主要集中在可燃粒子云的燃烧机理方面。两所大学的参与研究人员提供了有关这项研究的大量数据。来自东京大学：有关通过可燃粒子云（硬脂酸、1-十八醇、金属粒子）传播的火焰的传播机制和结构的数据。来自华沙理工大学：有关通过可燃粒子云传播的点火现象和火焰结构的数据（主要是 1-十八醇）。结果，阐明了以下几点。 - 通过可燃颗粒传播火焰的结构（火焰结构、预热区厚度、反应区厚度） - 通过可燃颗粒云传播火焰的传播机制（传热机制、火焰传播速度）从这些结果可知，此类异质火焰的厚度通过可燃颗粒云传播的火焰比通过均质可燃预混混合物传播的火焰要厚得多，并且非均质火焰的传播速度变得慢得多。这种知识对于正确理解异质系统中的燃烧现象非常重要。该项目可以促进非均相燃烧的研究以及日本和波兰之间的学术交流。