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在非零进口导叶预旋角度下,采用非定常的方法对进口导叶/叶轮/扩压器三部件之间非定常相干进行了数值模拟,研究了进口导叶/叶轮/扩压器三部件之间动静相干的机理。结果表明,叶轮由于受进口导叶尾流和扩压器势反冲效应的双重非定常影响,叶轮受非定常影响最小的区域出现在叶片50%弧长附近,最大的非定常影响出现在叶轮和扩压器之间的动静交界面上。当离心压缩机前带有进口导叶预旋时,扩压器受前面两部件的同时影响,扩压器叶片上的非定常变化沿流向比较均匀。
The unsteady method is used to simulate the unsteady coherence among the three parts of the inlet guide vane / impeller / diffuser under the pre-rotation angle of the non-zero inlet guide vane. The effects of the inlet guide vane / impeller / diffuser three Static and dynamic components between the mechanism. The results show that due to the double unsteady influence of the inlet vane wake and diffuser potential recoil effect, the region with the least unsteady impeller appears near the arc length of 50%. The maximum unsteady influence occurs in the impeller And the diffuser between the static and dynamic interface. When centrifugal compressor with pre-rotating guide vane, the diffuser affected by the front two components at the same time, the diffuser leaves unsteady changes along the flow more evenly.