Casing treatment is an effective way to improve the stable working margin of the compressor and plays an important role in ensuring the stable and safe work of the compressor. On the premise that the numerical results are in agreement with the experimental values, the paper study on a new type of the self-circulating casing treatment with double-bleed ports structure was carried out on the NASA rotor 37 by numerical simulation. It is found that compared with the self-circulating casing treatment with single-bleed port structure, the self-circulating casing treatment with double-bleed ports structure is more favorable for improving the stall margin of the rotor, and the improvement of the stall margin obtained at the rotor design speed is as high as 9.57%. Compared with the other two self-circulating casing treatments with single-bleed port structure, the improvement of the stall margin is increased by 37.90 and 49.53%, respectively. The self-circulating casing treatment with double-bleed ports structure has a significant effect on the enhancing stability, but at the same time, it causes a greater efficiency loss, which reduces the design point efficiency of the rotor by 0.34%. Through detailed analysis of the flow field, it is found that the self-circulating casing treatment improves the flow capacity of the blade tip region, weakens the blockage degree of the blade tip region, and reduces the blade tip load, thereby improving the stall margin of rotor. Compared with the self-circulating casing treatment with single-bleed port structure, the self-circulating casing treatment with double-bleed ports structure is more advantageous for delaying the flow separation of the suction surface, delaying the occurrence of the blade tip stall to make the stability of rotor more favorable, and obtained stall margin improvement is the greatest.

中文翻译：

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双排气口结构自循环机壳处理对压气机性能的影响

机壳处理是提高压缩机稳定工作裕度的有效途径，对保证压缩机稳定安全工作具有重要作用。在数值结果与实验值一致的前提下，本文在NASA旋翼37上进行了一种新型双排气口结构自循环套管处理的数值模拟研究。研究发现，与单放气口结构的自循环套管处理相比，双放气口结构的自循环套管处理更有利于提高转子失速裕度，提高失速裕度在转子设计速度下获得的效率高达 9.57%。与其他两种单放气口结构的自循环套管处理相比，失速余量分别提高了37.90%和49.53%。双排气口结构的自循环机壳处理在提高稳定性方面效果显着，但同时也造成了更大的效率损失，使转子的设计点效率降低了0.34%。通过对流场的详细分析，发现自循环套管处理提高了叶尖区域的通流能力，减弱了叶尖区域的堵塞程度，降低了叶尖载荷，从而提高了失速裕度转子。与单放气口结构的自循环套管处理相比，