矿井火灾时期烟流与围岩间热交换理论研究

发布时间：2018-03-20 17:34

本文选题：巷道火灾　切入点：热交换理论　出处：《辽宁工程技术大学》2013年硕士论文　论文类型：学位论文

【摘要】：本文以分析火灾燃烧特性与火灾时期风流对烟流的影响为基础,采用CFD方法对巷道火灾时期烟流与围岩间的热交换理论及规律进行分析研究。本文首先分析研究了高等传热学的烟流与围岩间热交换理论,为之后的实验和数值模拟提供理论依据。其次,利用激光闪热法导热仪进行实验,经过实验测出热传递过程中导热系数,然后,利用CFD软件对火灾时期巷道内烟流与围岩间发生热交换后温度变化情况进行模拟,分析火灾时期巷道烟流与围岩间热交换规律及变化趋势。最后,以此为依托进一步分析矿井火灾时期梯形巷道断面烟流温度分布情况,推导出火灾时期梯形断面烟流温度分布公式,并引进修正系数fy和fz对烟流温度分布计算公式进行修正。得出了火灾时期烟流与围岩间热交换的过程及变化规律。
[Abstract]:This paper is based on the analysis of the characteristics of fire combustion and the influence of wind flow on smoke flow during fire. The theory and law of heat exchange between smoke flow and surrounding rock during tunnel fire are analyzed and studied by CFD method. Firstly, the theory of heat exchange between smoke flow and surrounding rock in higher heat transfer theory is analyzed and studied in this paper. It provides the theoretical basis for the later experiments and numerical simulation. Secondly, the thermal conductivity in the process of heat transfer is measured by using the laser flashover thermal conductivity instrument, and then, In this paper, CFD software is used to simulate the change of temperature after heat exchange between flue gas flow and surrounding rock in roadway during fire period, and to analyze the regularity and trend of heat exchange between flue gas flow and surrounding rock in fire period. Based on the analysis of the temperature distribution of the trapezoidal roadway section during the mine fire, the formula of the temperature distribution of the trapezoidal section smoke flow during the fire period is derived. The calculation formula of smoke flow temperature distribution is modified by introducing correction coefficient FY and FZ. The process and variation law of heat exchange between smoke flow and surrounding rock during fire period are obtained.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD752

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