驻室式处理机匣——内部流动及扩稳机理的数值研究
Plenum chamber casing treatment——numerical research of internal flow and mechanism of stall margin improvements
-
摘要: 通过定常模拟的方法,研究了驻室式处理机匣对高负荷、高马赫数孤立转子性能的影响.结果表明:相同的处理机匣结构在不同的转速下取得的效果存在较大差异,在设计转速时,处理机匣并没有使风扇转子的失速裕度得到改善,并且效率下降约2.8%;在非设计转速时,处理机匣扩稳作用得到充分体现,转子稳定性得到较大程度的加强,并且没有导致转子性能的下降.通过对处理机匣内部流场的详细分析,揭示了驻室式处理机匣的扩稳机理.Abstract: The influence of plenum chamber casing treatment on the performance of high loaded and high-speed fan rotor was analyzed through steady simulation.The results indicate that the performance of the same casing treatment differs greatly under different rotational speeds.At the design speed,the casing treatment fails to improve the stall margin of fan rotor,and the efficiency declines by 2.8%.at non-design speed,it enhances significantly the stability of the rotor,without impairment of the rotor performance.The in-depth analysis of the flow field in the casing treatment reveals the inherent mechanism of stall margin improvements by the plenum chamber casing treatment.
-
Key words:
- aerospace propulsion system /
- casing treatment /
- axial compressor /
- numerical simulation
-
[1] Koch C C.Experimental evaluation of outer case blowing or bleeding of single stage axial flow compressor[R].NASA CR-54592,1970. [2] Rabe D C,Hah C.Application of casing circumferential grooves for improved stall margin in a transonic axial compressor[R].ASME Paper GT-2002-30641. [3] Wilke I,Kau H P.A numerical investigation of the influence of casing treatments on the tip leakage flow in a HPC front stage[R].ASME Paper GT-2002-30642. [4] Wilke I,Kau H P.A numerical investigation of the flow mechanisms in a HPC front stage with axial slots[R].ASME Paper GT2003-38481. [5] Yang H,Nuernberger D,Nicke E,et al.Numerical investigation of casing treatment mechanisms with a conservative mixed-cell approach[R].ASME Paper GT2003-38483. [6] Madden D S,West M A.Effects of inlet distortion on the stability of an advanced military sweep fan stage with casing treatment[R].ASME Paper GT2005-68693.
点击查看大图
计量
- 文章访问数: 1314
- HTML浏览量: 1
- PDF量: 386
- 被引次数: 0