Performance Enhancement of Cross-Flow Fan by Inlet Guide vane

研究了进口导叶对贯流风机性能的影响。通过在贯流风机的吸气区设置导叶，使贯流风机的性能比不设置导叶时更高压力、更高效率。与转子的旋转方向相反的入口流的预旋转由导叶产生。在大流量区，由于来流的反旋使叶栅作功增加，并且在大流量时更好地避免了叶栅前缘的分离，从而获得了高压和高效率。此外，在流动区域中，可以抑制转子吸入口中的涡旋侧的循环流动。因此，与没有导向叶片的结果相比，在低功率下获得高效率

The effect of the inlet guide vane on the performance of the cross-flow fan was examined. By installing guide vane in the suction region, the performance of the cross-flow fan becomes more high pressure and high efficient than the case without the guide vane. The prerotation of the inlet flow which is counter directional with the rotation of the rotor is generated by the guide vane. In the high flow region, the high pressure and high efficiency are obtained since the suction cascade work increases by the orerotation of the flow, and since the leading edge separation of the suction cascade is more avoided to high flow. Moreover, in the flow region, it is possible to suppress the circulating flow in scroll side in the rotor suction inlet. Therefore, the high efficiency is obtained in the low power compared to the results without the guide vane