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将SIMPLE算法与RNG k-ε湍流模型相结合,完成了煤矿对旋式通风机全流场三维数值计算。流场仿真的求解区域采用非结构化网格进行离散,以进、出口压力为边界条件,采用运动参考系模型实现动-静交界面间的数据传递。采用有限元法完成前级转子的模态分析,提取不同振型下的振动频率。在对旋式通风机内流场仿真的基础上着重分析了叶轮区域速度场的分布规律,在模态分析基础上着重分析了不同振动频率下的振动特性。分析结果对对旋式通风机结构的优化设计及振动噪声控制具有重要参考意义。
Combining the SIMPLE algorithm with the RNG k-ε turbulence model, the three-dimensional numerical calculation of the full flow field of the rotary ventilator in a coal mine is completed. The solution area of flow field simulation is discretized by unstructured grid, and the inlet and outlet pressures are used as the boundary conditions. The motion reference system model is used to transfer the data between the dynamic and static interface. Finite element method is used to finish the modal analysis of the former stage rotor and extract the vibration frequency under different modes. Based on the simulation of the flow field in the rotating fan, the distribution of the velocity field in the impeller is emphatically analyzed. Based on the modal analysis, the vibration characteristics at different vibration frequencies are analyzed emphatically. The analysis results have important reference meaning for the optimization design and vibration noise control of the counter-rotating ventilator.