压气机叶片尾缘增厚方法的分析与研究  

Analysis and Research on The Method of Compressor Blade Trailing Edge Thickening

作　　者：郑健生[1] 丁骏 隋永枫[1,4] 蓝吉兵 辛小鹏[1] 郑群[3] ZHENG Jian-sheng;DING Jun;SUI Yong-feng;LAN Ji-bing;XIN Xiao-peng;ZHENG Qun(Hangzhou Steam Turbine Co.,Ltd.,Hangzhou 310022,China;Hangzhou Turbine Power Group Co.,Ltd.,Hangzhou 310022,China;College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China;Zhejiang Rancon Turbine Machinery Co.,Ltd.,Hangzhou 311199,China)

机构地区：[1]杭州汽轮机股份有限公司,浙江杭州310022 [2]杭州汽轮动力集团有限公司,浙江杭州310022 [3]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001 [4]浙江燃创透平机械股份有限公司,浙江杭州311199

出　　处：《节能技术》2022年第3期258-262,共5页Energy Conservation Technology

基　　金：中国博士后科学基金(2020M671672);浙江省重点技术创新项目。

摘　　要：受限于制造能力,压气机叶片的尾缘需要增厚。为了尽可能保持原有设计的气动性能,对两种不同的尾缘增厚方法进行了数值模拟研究。第一种方法尽可能保持了原有叶型的吸/压力面型线,以移动尾缘圆心的方式获得增厚叶型,叶型的弦长缩短;第二种方法保持了原有叶型的弦长,以改变二维叶型局部厚度分布的方式获得增厚叶型。数值模拟结果显示,在一致的尾缘厚度下,两种尾缘增厚方法对压气机叶片的稠度、展弦比、扩压能力和气流折转能力均产生了不同的影响。相较而言,方法一导致了压气机叶片的负荷降低,扩压和气流折转能力下降;方法二能够更大程度的保持气动性能。建议采用方法二对过薄的叶片尾缘进行加厚处理。Limited by manufacturing capacity,the trailing edge of compressor cascades need to be thickened.In order to keep the original aerodynamic performance as much as possible,two different methods to thicken the trailing edge were studied numerically.By the first method,the suction/pressure surface profile of the original blade are kept the same,and the thickened blade shape is obtained by moving the center of the trailing edge circle,and the chord length of the blade is shortened.By the second method,the chord length of the original blade is maintained and the thickened profile is obtained by changing the local thickness distribution of the two-dimensional profile.Numerical simulation results show that under the same trailing edge thickness,the two thickening methods have different influences on the compressor cascade solidity,aspect ratio,diffusion capacity and airflow turning capacity.In comparison,the first method leads to a reduction of the blade loading,and a decrease in the capacity of diffusion and flow turning;the second method can maintain aerodynamic performance to a greater extent.It is suggested to adopt the second method to thicken trailing edge of the blade that is too thin.

关 键 词：压气机 扩压叶栅 尾缘 气动性能 数值模拟 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]