论文部分内容阅读
为了探索不同开度的缝式机匣处理对压气机稳定裕度的影响,以跨声的Rotor 67为研究对象,通过非定常数值计算方法探索了设计转速下3种不同开度的机匣处理对该转子稳定性的作用。详细分析了各流量工况下不同机匣时通过转子叶顶间隙面的气流质量和动量、叶顶的流动结构、周向平均后的总压损失分布等。研究发现:随着缝开度的增加,机匣处理的扩稳能力增强;实壁机匣近失速工况下缝开度为80%的机匣处理使叶顶间隙泄漏流减小了33.3%,最大程度的削弱了转子前缘压力面侧的堵塞气流,使激波往下游移动距离最大,减少了间隙泄漏流与主流掺混造成的总压损失。
In order to explore the influence of slotted casing with different opening on the stability margin of the compressor, the transonic Rotor 67 was used as the research object to investigate the design of casing with three different opening degrees at design speed by unsteady numerical calculation method Effect on rotor stability. The mass and momentum of air flow passing through the rotor blade tip clearance surface under different flow conditions are analyzed in detail. The flow structure of the tip and the distribution of the total pressure loss after the circumferential averaging are analyzed in detail. The results show that with the increase of the degree of seam opening, the stability of the casing treatment is enhanced. The casing clearance of 80% of the casing in the near-stall condition of the solid wall casing reduces the leakage flow in the tip clearance by 33.3% , To the maximum extent weakened the blockage airflow on the pressure front side of the rotor leading edge to maximize the shock wave travel downstream and reduce the total pressure loss caused by the gap leakage flow and mainstream mixing.