东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (1): 114-117.DOI: 10.12068/j.issn.1005-3026.2016.01.024

• 资源与土木工程 • 上一篇    下一篇

柴油在受限空间火灾轰燃实验中的引燃特性

张培红， 俞艳秋， 赵鹏程， 汤小英   

  1. (东北大学 资源与土木工程学院， 辽宁 沈阳110819)
  • 收稿日期:2014-11-26 修回日期:2014-11-26 出版日期:2016-01-15 发布日期:2016-01-08
  • 通讯作者: 张培红
  • 作者简介:张培红(1969-)，女，河南南阳人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51374050，51174046); 国家级大学生创新创业训练计划项目(140041)

The Ignition Characteristics of Diesel in Fire Flashover Experiment in Confined Space

ZHANG Pei-hong， YU Yan-qiu， ZHAO Peng-cheng， TANG Xiao-ying   

  1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819，China.
  • Received:2014-11-26 Revised:2014-11-26 Online:2016-01-15 Published:2016-01-08
  • Contact: ZHANG Pei-hong
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摘要： 以酒精作为主燃料，改变酒精池火的直径和通风条件，进行火灾轰燃实验.通过对受限空间上部热烟气层平均温度、地面所接收到的热辐射通量和氧气体积分数的测试，分析引燃柴油的临界条件.结果表明，当受限空间氧气体积分数为20.4%时，若上部热烟气层平均温度高于364℃，地面接收到的热辐射高于4.38kW/m2，可以引燃柴油.当受限空间中氧气体积分数降低到18.5%时，引燃柴油所需的上部热烟气层平均温度临界值为390℃，地面接收到的热辐射临界值为6.65kW/m2.因此，一定的受限空间中，引燃柴油的氧气量、上部热烟气层平均温度和地面接收到的热辐射通量3个临界参数是互相制约的.

关键词: 通风, 热烟气层温度, 轰燃, 热辐射通量, 引燃

Abstract: Fire flashover tests were conducted with different diameters of ethanol under different ventilation conditions by using ethanol as the main fuel and diesel as the second fuel. The average temperature in the upper layer of the hot smoke， the radiation heat flux at the floor and the oxygen concentration were measured to analyze the critical ignition conditions of the diesel. The results illustrated that the diesel can be ignited when the average temperate in the upper layer of the hot smoke is over 364℃， the radiation heat flux at the floor is higher than 4.38kW/m2 and the oxygen concentration reaches 20.4% under the experiment state. If the oxygen concentration is reduced to 18.5%， the diesel can be ignited when the critical average temperate in the upper layer of the hot smoke is over 390℃and the radiant heat flux at the floor is higher than 6.65kW/m2. It is concluded that in confined space， the critical parameters for the ignition of disel， i.e. the oxygen concentration， the average temperature in the upper layer of the hot smoke and the radiant heat flux at the floor are mutually interinhibitive.

Key words: ventilation, hot smoke layer temperature, flashover, radiantion heat flux, ignition

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