洞室群施工通风规律及粉尘浓度分布规律研究

Study on lawsof ventilation and dust concentration distribution during construction of cavern group

为掌握抽水蓄能电站地下洞室群施工通风规律及粉尘浓度分布规律,以河北丰宁抽水蓄能电站为例,针对水电站地下厂房的四个主要洞室,采用计算流体力学方法(CFD),建立了水电站地下洞室群的通风风流组织和粉尘浓度分布模型,对不同通风回路状态下的地下洞室群的气流运行情况及粉尘分布情况进行了数值模拟,总结出地下洞室群在不同贯通回路下的风流运行规律,并应用烟尘净化装置解决了复杂地下洞室群的排烟问题。

In order to find out the laws of ventilation and dust concentration distribution during constructionof underground cavern group of pumped storage hydropower station, The construction of Fengning Pumped Storage Hydropower Station in Hebei Province is taken as the engineering case, and then a model for the airflow organization and dust concentration distribution during the construction of the underground cavern group of the hydropower station is established with the method ofcomputational fluid dynamics (CFD ) for the four main caverns of the underground powerhouse of the hydropower station, with which the airflow movement and the dust distribution of the underground cavern group under the conditions of different ventilation circuits are numerically simulated, thus the airflow movement lawsof the underground cavern group under different through circuits are summarized. On the basis of this, the problem from the smoke extraction of the complicated underground cavern group is solved with the relevant smoke-dust purifying device.