Aerodynamics performances of axial fans and contra rotating axial fans which are commonly used for mining local ventilation were analyzed and compared theoretically in detail. According to their own characteristics, the principle of choosing right fan for mine local ventilation was put forward.%详细对比分析了矿井局部通风中常用的两级轴流通风机和对旋轴流风机的理论压力参数和动力特性,根据他们各自的优缺点,提出了正确选择使用矿井局部通风设备的基本原则.
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