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在轴对称尾流撞击实验的基础上,进行了多种非轴对称尾流撞击实验研究.当合理安排进口导叶的数目和周向分布形式时,进口导叶(IGV)的非轴对称尾迹能对下游转子流场产生有益的非定常耦合激励作用.与轴对称尾流撞击方案相比,非轴对称尾流撞击方案在保持了有益的高频激励信号的同时,引入了合适的低频方波激励信号和其他有益的副频激励信号,使得导叶尾迹更容易与压气机中的复杂涡系产生耦合激励作用,例如通道涡、间隙涡和尾迹分离涡等.实验结果显示,非轴对称尾流撞击方案B能使压气机的最高效率提高1.2%,总压升和稳定裕度也略有增加.
Based on the axial symmetric wake collision experiment, a variety of non-axisymmetric wake collision experiments were carried out.When the number of guide vanes and the circumferential distribution are properly arranged, the non-axisymmetric wake of the inlet guide vane (IGV) Which can produce beneficial unsteady coupling excitation for the downstream rotor flow field.Compared with the axial symmetric wake collision scheme, the non-axisymmetric wake collision scheme, while maintaining a useful high-frequency excitation signal, introduces a suitable low frequency side Wave excitation signals and other useful sub-excitation signals make it easier for the guide vanes to generate coupled excitation with complex vortices in the compressor, such as channel vortices, gap vortices and wake separation vortices. Experimental results show that non-axisymmetric The wake impact program B increased the maximum efficiency of the compressor by 1.2% and slightly increased the total pressure rise and stability margin.