Simulation of fire in subsurface space

地下空间火灾模拟

基本信息

批准号：
05452319
负责人：
UCHINO Kenichi
金额：
$ 3.01万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452319/
关键词：
Fire Fire fighting CFD Model experiment Subsurface Analogy 消化と退避

项目摘要

The results of experiments executed in this year are as follows.1. Characteristics of combustion of a PMMA rod in a duct.Rods of PMMA were burned in a duct as a substitute for a cable fire. The burning characteristics, the spreading speed of the flame and the fume of the combustion, of the PMMA rods were measured for the simulation of a cable fire in subsurface space. Then, 1) a combustion of 10 mm diameter rod could not be maintained under the condition of no airflow, 2) the combustion became intense when the air speed was more than 0.5 m/s, 3) the spreading speed of the flame became faster when the rod was supported near the roof of the duct although there were no apparent increase of the speed in another condition.2. Visualization of flow using laser light sheetA new roadway model with arch supports was made and the flow inside was measured. There were a lots of eddy near the supports, however, there was no essential difference in the main flow in the roadway between the models with and without supports. A model with some obstruct near the heading face was also measured.3. Development of a computer program to simulate a fire in subsurface spaceThere found several important conditions in addition to the development of the program itself, that is, the distance between boundary of the calculation and the ventilation duct should be large and the size of grid should be small or the accuracy can not be assured.

今年执行的实验结果如下1。 PMMA杆在管道中的燃烧的特征。PMMA的rod被燃烧在管道中，以替代电缆火。测量了PMMA杆的燃烧特性，火焰的扩散速度和燃烧的烟雾，以模拟地下空间中的电缆火。然后，1）在无气流的条件下，直径10毫米的燃烧无法保持，2）当空气速度超过0.5 m/s时，燃烧变得强烈，3）当杆附近在阴道屋顶附近支撑杆时，火焰的散布速度变得更快，尽管没有明显的速度在另一种条件下的速度增加。2。2。22。使用激光灯板对流动的可视化进行了带有拱支架的新道路模型，并测量了内部的流动。在支撑架附近有很多涡流，但是，在有和没有支撑的模型之间，道路的主要流量没有根本差异。还测量了一个模型在标题附近的模型3。开发计算机程序来模拟地下间距中的火灾，除了程序本身的开发外，还发现了几个重要条件，即计算和通风管之间的距离应该很大，网格的大小应该很小，或者不能保证准确性。