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基于煤矿用两级轴流式通风机建立了全流场三维几何模型,采用非结构化网格进行空间离散,以进、出口压力为边界条件,结合SIMPLE算法和RNGκ-ε湍流模型完成流场的数值计算。同时采用有限元方法完成后级转子的振动特性分析,提取了不同振型下的振动频率。基于联合仿真结果,着重分析了叶轮区域压力场的分布规律,以及不同振动频率下的振动特性。仿真结果对两级轴流式通风机结构的优化设计及减振降噪具有重要参考意义。
Based on the two-stage axial fan in coal mine, a full-flow three-dimensional geometric model was established. The unstructured grid was used for spatial discretization. The inlet and outlet pressures were used as the boundary conditions. The SIMPLE algorithm and RNGκ-ε turbulence model were used to complete the flow field Numerical calculation. At the same time, the vibration characteristics of the posterior stage rotor were analyzed by finite element method, and the vibration frequency under different modes was extracted. Based on the joint simulation results, the distribution of the pressure field in the impeller area and the vibration characteristics at different vibration frequencies are emphatically analyzed. The simulation results have important reference meaning for the optimization design of two-stage axial fan structure and vibration and noise reduction.