矿井井筒提升设备绕流的数值模拟

基于经典的流体力学理论,建立罐笼绕流的二维RNGκ-ε湍流模型,分析其初始边界条件,并结合工程实际应用FLUENT计算流体动力学软件模拟罐笼运行时井筒内流场及压力场,得出井筒内流场及压力场的变化规律。研究结果表明:在罐笼运行期间,由于空间受限而引发活塞效应,井筒内压力发生瞬态变化,造成通风系统的压力波动,导致气流运动的动态改变,对通风系统稳定性有一定的影响。

Numerical Simulation of Airflow around Hoisting Equipment in Mine Shaft

The hoist equipment causes piston effect when moving up and down in the vertical shaft, and leads to frequent change of flow filed and pressure field around the hoist. Based on classical hydrodynamic theory, RNG κ-ε turbulence model is set. The initial boundary is analyzed, and combining with practice and using FLUENT software of computational fluid dynamics (CFD), the two-dimensional pressure field and flow field around the moving cage are simulated to obtain the pressure field and flow field regularity of typical sections by numerical simulation. Research results indicate that during the rising and falling of cage, since the vertical shaft belongs to restricted clearance, causes piston-effect and pressure changes repeatedly, and results in dynamic change of airflow leading to adverse effect on the stability of ventilation system.