高海拔隧道主风机的选型研究

Study on Pattern Selection of Main Ventilating Fan of High Elevation Tunnel

通风机的性能受诸多因素的影响,风流密度是一重要影响参数。文章在鹧鸪山通风基础参数调查的基础上,根据相似比定律,研究了高海拔地区风流密度对通风机工作性能的影响。研究表明,高海拔地区,风机的实际工作风压和风机的电机功率随风流密度的降低而降低。高海拔条件下,进行风机的选型时,应根据相似比定律对计算风压和功率进行修正。建议风机安装后对风机性能进行现场测试,拟合风机的工作性能曲线,为运营机电控制提供依据。

Based on the investigation of fundamental parameters of ventilation and according to law of similarity ratio, in this paper the working performances of ventilating fan in high elevation areas are studied. The findings indicate that, in high elevation areas, actual working performances of ventilating fan will vary with the density of airflow. When conducting pattern selection of ventilatory fan, corresponding correction should be performed. The fan working performances should be tested in-situ after installation to acquire the performances curve.