Effect of inclination angle on flame spread over sand bed wetted with liquid fuel

YAO Yao; GUO Jin; XIE Feng; HU Kunlun

doi:10.3969/j.issn.0438-1157.2013.11.019

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Effect of inclination angle on flame spread over sand bed wetted with liquid fuel

更新时间：2025-12-10

- Effect of inclination angle on flame spread over sand bed wetted with liquid fuel
- CIESC Journal Issue 11, Pages: 4025-4030(2013)
- 作者机构：
  
  1. 安徽理工大学化学工程学院,安徽,淮南,232001
  2. 91291部队,海南,三亚,572011
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.11.019
  CLC： 937TQ086.5TQ207.9
- Online First：05 November 2013，
  
  Published：05 November 2013
- 稿件说明：
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YAO Yao, GUO Jin, XIE Feng, et al. Effect of inclination angle on flame spread over sand bed wetted with liquid fuel[J]. CIESC Journal, 2013, (11): 4025-4030.
DOI：

YAO Yao, GUO Jin, XIE Feng, et al. Effect of inclination angle on flame spread over sand bed wetted with liquid fuel[J]. CIESC Journal, 2013, (11): 4025-4030. DOI： 10.3969/j.issn.0438-1157.2013.11.019.

摘要

利用纹影系统、CCD相机以及K型热电偶对正丁醇润湿条件下不同角度的砂床表面火蔓延特性进行了研究

分析了不同砂床表面倾角对火蔓延的影响机理。研究结果表明:正丁醇润湿条件下变角度砂床表面火焰是稳定匀速蔓延的

向上蔓延时

火焰的高度、黄色发光区以及蔓延速度随着倾角的增加而增大;向下蔓延时

火焰的高度、黄色发光区以及蔓延速度随着倾角的增加而减小;蔓延火焰前方存在预热区

且预热区随表面倾角的增大而增大:砂层内部存在热边界层

且砂床热边界层厚度随表面倾角的增加而减小。得到的火蔓延特性及燃烧机理为此类液体燃料的储存、使用以及环境保护提供了一定的科学依据。

Abstract

In order to prevent fire accident caused by leakage of liquid fuels in the process of storing

using and transporting

a schlieren system

CCD cameras and K-thermocouples were used to study the characteristics of flame spreading over sand bed wetted with 1-butanol.The effect of surface inclination angle of sand bed on the mechanism of flame spread was analyzed.The results indicate that the flame spreads on the sand bed at constant speed.When the flame spreads upward

its height

yellow luminous zone and spread rate increase with surface angle; when the flame spreads downward

they all decrease as the surface angle increases.As the surface inclination angle increases

the preheating zone magnifies

which is in front of the flame

and the thickness of thermal boundary layer decreases

which is in the sand layer.The investigation on flame spread characteristics and burning mechanism provide some guideline for fire suppression and environmental protection.

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