完全可逆地铁风机的三维优化设计

采用试验设计、流场结构分析和叶片造型调整相结合的方法，对完全可逆地铁风机进行三维优化设计。结果表明在不改变风机外径、转速和叶尖间隙的情况下，风机的性能得到大幅改善。设计工况下，风机正转全压效率达到82.3%，比初始设计提高9.1%；风机反转全压效率达到79.1%，比初始设计提高3.3%；风机的内部流场合理，没有明显的分离和回流；风机出口低压区得到明显改善。风机的性能曲线比较平滑，变工况性能好；经性能试验验证，优化设计后的风机各项指标均达到了设计要求。

THREE-DIMENSIONAL OPTIMIZATION DESIGN OF HUNDRED-PERCENT REVERSIBLE SUBWAY FAN

Optimization design of a hundred-percent reversible axial fan is conducted by the method of three-dimensional optimization design based on design of experiment, flow analysis and blade profile modification. The results show that the performance of the fan is improved significantly without changes of diameter, rotation speed and tip clearance. At designed condition, the efficiency of positive rotating fan is 82.3% by 9.1% improved and the efficiency of negative rotating fan is 79.1% by 3.3% improved. The internal flow field of the fan is reasonable without obvious separations and back flows. The total pressure distribution at the fan outlet is improved as well. The performance of the fan at different flow rate is fine with the smooth performance curve. The three-dimensional optimization design of the axial fan is successfully validated by the experimental results.