端弯叶片对大展弦比扩压叶栅静压场分布的影响研究  

Effects on the Static Pressure Distribution of the End-bend Blade for a High Aspect Ratio Diffusion Cascade

作　　者：张春梅[1] 张成义[1] 冯永志[1] 张宏涛[1] 

机构地区：[1]哈尔滨汽轮机厂有限责任公司,哈尔滨150046

出　　处：《汽轮机技术》2016年第5期355-356,395,共3页Turbine Technology

基　　金：国家863计划重型燃气轮机重大项目资助(项目编号:2008AA05A302)

摘　　要：重型燃气轮机压气机的大展弦比扩压叶栅端区存在流动分离现象,通过对大展弦比扩压叶栅的端弯改型来研究端弯叶片对叶栅静压场分布的影响。通过对比分析型面静压分布和端壁静压分布随弯高和角度的变化规律,在合适的弯高及角度变化下,端弯叶片能够有效抑制静叶端区的流动分离,改善端区通流能力。The flow separation is exist on the corner of the high aspect ratio compressor cascade in a heavy gas turbine compressor. The effect on the cascade static pressure distribution of the end-bend blade are studied. By way of comparison and analysis of the changing pattern with bowed height and angle of the end wall static pressure distribution and the distribution along profile, the end-bend blade keep back effectively the separation flow and improve flow capacity at the corner zone with a appropriate bowed height and angle variation.

关 键 词：端弯改型 扩压叶栅 静压分布 大展弦比 

分 类 号：TK474.811[动力工程及工程热物理—动力机械及工程]