合成射流控制高负荷扩压叶栅分离数值研究  

Numerical Investigation on Effectiveness of Flow Separation Control in High-load Compressor Cascade by Synthetic Jet

作　　者：蔡乐[1] 周逊[1] 卢少鹏[1] 崔涛[1] 王松涛[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《工程热物理学报》2013年第4期632-636,共5页Journal of Engineering Thermophysics

摘　　要：采用数值模拟的方法,研究了合成射流对高负荷扩压叶栅分离流动的控制效果,分析了关键的控制参数激励频率、幅值和位置对控制效果的影响。结果表明,合成射流能够有效削弱高负荷扩压叶栅内的大尺度分离结构。激励频率与原流场的主分离涡脱落频率相近时控制效果占优。激励幅值存在较为明显的阈值,当激励幅值大于该阈值时控制效果较为显著。激励位置位于主分离涡起始位置附近时,控制效果较好。The effectiveness of flow separation control in high load cascade by synthetic jet is investigated through numerical simulation of the effect of excitation frequency and amplitude together with the adaptability of synthetic jet to off-design conditions. Test results indicate that synthetic jet can be used to effectively control the large-scale flow separation in compressor cascade. Preferable results can be obtained when excitation frequency is close to or times of the characteristic frequency of original flow field. Excitation amplitude has a more important effect on the effectiveness of flow separation control, and the increase in excitation amplitude can bring about a dramatic decrease in the loss of total pressure.

关 键 词：合成射流 高负荷扩压叶栅 分离流动控制 非定常激励 

分 类 号：TK474.7[动力工程及工程热物理—动力机械及工程]