在横流风机叶轮前加前置导叶(IGV)可以改善横流风机的进口流场,减少叶片上的流动分离,进而降低横流风机的功率。采用非结构化网格RNGk-ε两方程模型,分别对不加IGV、加IGV1,以及IGV2的横流风机内部流场进行数值模拟,并对三种情况进行气动性能及噪声试验。数值模拟和试验结果表明在加不同IGV以后,横流风机的噪声增大,但是功率在加IGV2后出现了一定的降低。
IGV can change the attack angle of flow before the impeller at CFF, so IGV can decrease the loss on the blades and the power of CFF can be reduced. We simulate and test CFF with IGV1, IGV2 and without IGV respectively by unstructured grid and RNG k-ε model. The result of CFD and experiments show that the SPL(sound pressure level) of CFF increased for all IGV and the power of CFF decreased for IGV2.
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