双洞互补式隧道通风横通道风机位置的确定

Parameters to Determine Location of the Cross-channel Fan in Complementary Tunnel Ventilation

文章分析了诱导风机在横通道不同位置对通风网络的影响。根据射流通风理论,得出射流断面风速大时会导致偏流的出现,影响气流组织的发展。数值模拟结果验证了偏流现象的产生,指出诱导风机射流断面风速及诱导段长度决定风机最佳位置。研究发现,风机设置在横通道前部比设置在中部有利于气流组织,可减少汇流三通处的阻力损失。

This paper analyzes the impact of induced fan to ventilation networks in different locations of the cross-channel.According to the theory of jet ventilation,jet cross-section wind speed will lead to the appearance of bias and influence the development of airflow organization.The numerical simulation results demonstrate the generation of the bias phenomenon,pointed out that the wind speed of fan jet cross section and the induction length determine the best location of the fan.The study shows that the fan set in front of the cross-channel is more conducive than set in the central in air distribution to reduce the resistance loss of the confluence of three links.