反叶片角向缝机匣处理影响轴流压气机性能的机理

发布时间：2018-06-04 01:53

本文选题：轴流压气机 + 反叶片角向缝机匣处理　；参考：《航空动力学报》2016年10期

【摘要】：采用试验和非定常数值模拟方法研究了反叶片角向缝机匣处理对亚声速轴流压气机性能的影响.试验与数值计算结果均指出反叶片角向缝机匣处理后,转子在降低12%左右最大等熵效率的基础上获得30.1%左右的失速裕度改进量.详细的转子叶顶流场分析表明反叶片角向缝机匣处理改善了叶顶间隙泄漏流动,消除了实体壁机匣时叶顶通道低速泄漏流形成的堵塞,因此转子稳定性得以提高.同时转子叶片与处理缝的相对位置变化会影响处理缝的扩稳能力.处理缝中回流、处理缝形成的喷射流与叶顶通道主流的相互作用都造成较大的流动损失,进而使转子等熵效率降低.反叶片角向缝机匣处理前移约55%叶顶轴向弦长的数值研究结果表明,与反叶片角向缝机匣处理比较,反叶片角向缝机匣处理前移获得的失速裕度改进量降低约10.4%,但等熵效率的恶化程度降低近64%.
[Abstract]:The effect of reverse blade angular slot casing treatment on the performance of subsonic axial flow compressor was studied by means of experimental and unsteady numerical simulation. The experimental and numerical results show that the rotor can reduce the maximum isentropic efficiency by about 12% and obtain a stall margin improvement of about 30.1% after the reverse blade angular slot casing is treated. Detailed analysis of rotor blade tip flow field shows that the reverse blade angular slot casing treatment improves the tip clearance leakage flow and eliminates the clogging of the low speed leakage flow in the blade top channel during the solid wall casing, so the rotor stability can be improved. At the same time, the relative position of the rotor blade and the treated joint will affect the stability of the treated joint. The flow loss caused by the jet flow formed by the treatment slot and the interaction between the jet flow formed by the treatment seam and the mainstream of the vane channel resulted in a decrease in the rotor Isentropic efficiency. The results of numerical study on the axial chord length of the blade tip of about 55% forward displacement of the reverse blade angular slot casing treatment show that, compared with the reverse blade angle joint casing treatment, The improvement of stall margin obtained by backward blade angle-slotted casing treatment decreases about 10.4 percent, but the deterioration of Isentropic efficiency is reduced by nearly 64 percent.
【作者单位】：西北工业大学动力与能源学院;先进航空发动机协同创新中心;
【基金】：国家自然科学基金(51006084) 航空科学基金(2014ZB53014) 中央高校基本科研业务专项资金(3102014JCY01004) 陕西省自然科学基金(2015JM5202)
【分类号】：TH453

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