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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着火和火焰传播的燃烧安全性的基础研究，东京大学和华沙工业大学之间进行了学术交流。本研究是通过参与研究者在相互访问中交流知识和技术而完成的。本次科研资助项目共资助了4位研究人员的访问，主要围绕可燃颗粒云燃烧机理进行了知识和技术交流。由两所大学的参与研究人员提供了大量的数据。东京大学：关于通过可燃粒子云传播的火焰的传播机制和结构的数据（硬脂酸，1-十八烷醇，金属颗粒），来自华沙理工大学：通过可燃颗粒云（主要是1-十八醇）传播的火焰的点火现象和结构的数据。因此，阐明了以下几点。火焰通过可燃颗粒传播的结构（火焰结构、预热区厚度、反应区厚度）-火焰通过可燃颗粒云的传播机理（传热机理、火焰传播速度）根据这些结果，通过可燃颗粒云传播的这种非均匀火焰的厚度比火焰的厚度厚得多，通过均匀可燃预混物传播，非均匀火焰的传播速度变得更慢。这类知识对于正确理解非均相系统中的燃烧现象是非常重要的。该项目将促进日本和波兰之间的非均相燃烧研究和学术交流。