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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RNGκ-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。
Adding a front guide vane (IGV) in front of the cross-flow fan impeller can improve the inlet flow field of the cross flow fan and reduce the flow separation on the blade, thus reducing the power of the cross flow fan. The unstructured grid RNGκ-ε two-equation model was used to simulate the flow field inside the cross flow fan without IGV, IGV1 and IGV2, respectively. The aerodynamic performance and noise of the cross flow fan were tested. The numerical simulation and experimental results show that after adding different IGV, the noise of cross flow fan increases, but the power decreases a little after adding IGV2.