抽水蓄能电站地下厂房排风系统布置方式数值模拟研究

Numerical Simulation Study on Arrangement of Ventilation of Exhaust System in Underground Powerhouse of Pumped Storage Power Station

抽水蓄能电站地下厂房的通风效果对电站的运行具有重要意义,作为抽蓄电站地下厂房通风的关键一环,排风系统的设计与优化至关重要。为此,针对东北某待建抽蓄电站地下厂房总排风机地上与地下两种布置方式,利用CFD方法,研究了两种排风机房布置方式下地下厂房内的气体流动规律。首先对比排风系统数值模拟结果与模型试验测量结果,验证数值计算方法可靠性;然后根据电站地下厂房设计图纸建立原型数值模型,对两种排风系统布置方式的数值模拟结果进行对比研究,发现与地上式排风系统布置相比,地下式排风系统布置方案对排风通道内气体的驱动性更强,排风效果更好。

The ventilation effect of underground powerhouse in pumped storage power station is of great significance to operation of power station.Based on the underground powerhouse of a pumped storage power station to be built in Northeast of China,the law of gas flow in the underground powerhouse is studied by using the numerical simulation of two arrangements of the exhaust fan on the ground and underground.Firstly,the reliability of the numerical calculation method is verified by the scale model experiment.And then the prototype numerical model is established according to the design drawings of the underground powerhouse in power station.The numerical simulation results of the two arrangements of the general exhaust fan are compared.It is found that compared with the exhaust fan in the above-ground,the exhaust fan in the underground has a greater driving effect on the air circulation in the underground powerhouse,and the ventilation effect is better.