驻室式处理机匣——内部流动及扩稳机理的数值研究

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.

Plenum chamber casing treatment——numerical research of internal flow and mechanism of stall margin improvements

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.