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水电站地下洞室群自然通风网络模拟及应用研究 【作者】肖益民 【导师】付祥钊

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水电站地下洞室自然通风网络模拟及应用研究

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作者肖益民导师付祥钊
EqS|6D&Vj/C M0【作者基本信息】重庆大学,供热、供燃气、通风及空调工程,2005年,博士

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4bJ/x#H f4L{+[0【中文摘要】 在国际上大力推广自然通风的同时,国内因为安全生产的严峻局面,禁止地下矿井采用自然通风。我国正在大规模建设水电站,水电站地下洞室群能否采用自然通风,是个急待回答的重要问题。为此,本文开展了系统的研究,建立了基于网络模型的水电站地下洞室群自然通风模拟分析方法,揭示了水电站地下洞室群自然通风形成的机理特性,论证了国家重点工程小湾水电站地下水电站自然通风的可行性,提出了水电站地下洞室群中应优先采用自然通风的新观点。本文首先提出了水电站地下洞室群空间网络图化的概念和方法。界定了网络图要素的属性;建立了网络图的级次概念;提出了网络的级次组合分析方法;结合工程实例给出了水电站地下洞室群空间网络图化的基本方法;提出了边缘节点的概念,从理论上证明了大气虚拟分支的数目与连接方法。提出了网络分支阻抗U值的概念及其模型实验的理论和方法;采用相似模型实验,获得了小湾水电站地下洞室群关键位置的压力分布状态及关键分支的阻抗U值。然后用网络图化的方法建立了水电站地下洞室群自然通风的网络模型,包括网络流动模型、网络温度模型和网络热压模型。提出了分支热压的概念、分支温度分布模型及分支热压的计算方法。提出了网络温度模型的...更多概念,建立了通用的网络温度方程组,导出了方程组的系数矩阵表达式,并证明了方程式之间的相互独立性,使网络流动和网络温度状况在拓扑属性层次上联系起来,成为建立通用的网络模型和开发通用模拟程序的数学基础。进行了洞室内部温度扰量分解,首次提出了年温度波动作用热力系统和日温度波动作用热力系统的概念;建立了确定各热力系统远边界的系统频率特性分析方法;并将Z传递函数方法引入深埋地下洞室围护结构的不稳定传热计算。提出了水电站地下洞室群自然通风模拟的时间层次分解方法,构建了模拟程序的框架,用Matlab语言开发了数值模拟计算程序。从热压的形成机理分析入手,揭示了水电站地下洞室群自然通风形成的机理。揭示了热压自然通风网络中存在的热压分布多态性现象及其原因,给出了水电站地下洞室群的两种基本网络结构形式中,各种自然通风流向成立的条件式;揭示了热压分布多态性与流向成立条件式之间的联系,给出了并列母线洞或主变室之间出现局部环流的条件式及降低局部环流可能性的途径。通过模拟计算,确定了小湾水电站地下洞室群的自然通风一级网络结构及主排风洞的断面积,研究结果被实际工程采用,节约了大量的工程建设费用。揭示  还原水利论文!_ SB$JSZ

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【英文摘要】 Natural ventilation in the mine has been forbidden in China because of the security, while it is popular in the world. Now hydropower stations have been constructing on a large scale in our country. So the problem whether natural ventilation can be used in the underground excavation cluster of hydropower station urgently needs to be solved. This paper carries on the research systematically, establishes analyses method based on network model about the natural ventilation in the underground excavation cluster of hydropower station, reveals natural ventilation’s mechanism and characteristics in the underground excavation cluster of hydropower station, demonstrates natural ventilation’s feasibility in the national important project- Xiaowan underground hydropower station, and brings forward a new viewpoint that natural ventilation should be adopted firstly in the underground excavation cluster of hydropower station.This paper puts forward the concept and method about the network graphics o...更多f underground excavation cluster of hydropower station firstly. Confirms the property of the network graph’s elements; establishes the concept about network graph’s rank; brings forward rank combination’s analysis method; offers the basic method about the network graph of underground excavation cluster of hydropower station referring to actual project; puts forward the concept about the fringe node; and proves the number and the connecting method about the atmospheric virtual embranchment. Additionally, puts forward the concept about the impedance value U of the embranchment of the network and the theory and the method about the model experiment; gains the pressure distribution of the key places of the underground excavation cluster of Xiaowan hydropower station and the impedance value U of the key embranchment by the model experiment.And then establishes the natural ventilation network model about the underground excavation cluster of hydropower station with network graph which includes the network flow model,network temperature model and network heat pressure model. Puts forward the concept of the embranchment heat pressure,embranchment temperature distribution model, and the calculation method about the embranchment heat pressure. And brings forward the concept about network temperature model, sets up universal equations about the network temperature, educes their matrix expressions, and proves  还原水利论文je]*C;L@Z1]

3S1]G6U@K_[0【中文关键词】 水电站; 地下空间; 自然通风; 网络模拟水利论文9@ noV w.T#SP
【英文关键词】 Hydropower station; Underground space; Natural ventilation; Network simulation
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TAG: 地下洞室 付祥钊 网络 肖益民 自然通风
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