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根据流体力学的计算原理,采用CFD计算软件FLUENT,对深圳东部过境地下互通的两车道矩形直线隧道、两车道和三车道拱形小半径曲线隧道、四车道拱形直线隧道的射流通风流场和升压力情况进行了数值模拟。通过模拟射流风机升压力与理论计算升压力的比较,得到了两车道矩形直线隧道和拱形曲线隧道的升压力折减系数、三车道曲线隧道和四车道直线隧道的横向安装间距及升压力折减系数。模拟结果还表明,设计提出150m的纵向安装间距是满足要求的,在风机安装数量较多的情况下,可适当减小间距。该研究成果为依托工程的设计提供了指导,也可为类似工程提供参考。
According to the calculation principle of fluid mechanics, CFD calculation software FLUENT was used to simulate the two-lane rectangular straight tunnel with two-lane and three-lane arched small radius curves and the four-lane arched straight tunnel with ventilation crossings in the east of Shenzhen. The pressure rise was numerically simulated. The pressure reduction coefficient of two-lane rectangular straight tunnel and arched curved tunnel are obtained by comparing the pressure rise of booster jet with that of theoretical calculation. The transverse installation clearance and pressure rise of three-lane curved tunnel and four-lane straight tunnel By the coefficient. Simulation results also show that the proposed design of 150m vertical installation spacing is to meet the requirements, the fan installation of a larger number of cases, may be appropriate to reduce the spacing. The research results provide guidance on relying on the design of the project and also provide reference for similar projects.