摘要
采用CFD数值模拟方法对某压气机静叶叶栅气动性能进行研究.在吸力面布置不同尺寸的凹坑,将深径比为0.25,球体半径分别为0.4、0.5、0.6、0.7 mm的凹坑布置在55%～78%弦长位置,球状凹坑可以通过提高边界层内的湍动能水平使得附面层抵抗分离能力变强,从而抑制并延缓附面层分离,减小分离后的反流区域面积,有效减小矩形叶栅中径处的尾迹损失,改善流场.结果表明,球体半径为0.5mm的凹坑效果较好,能够使叶栅出口总压损失降低17.63%.
CFD numerical simulation method was used to study the aerodynamic performance of a static cascade of a compressor.Different sizes of dimples were arranged on the suction surface,and the dimples with depth-diameter ratio of 0.25 and sphere radius of 0.4,0.5,0.6 and 0.7 mm were arranged at the chord length of 55%~78%.The spherical dimples can enhance the resistance of boundary layer to separation by increasing the turbulent kinetic energy level in the boundary layer,thus restraining and delaying the separation of boundary layer,reducing the area of the regurgitation region after separation,and effectively reducing the wake loss at the mid-diameter of rectangular cascade and improving the flow field.Results show that the dimple with a radius of 0.5 mm has a better effect,which can reduce the total pressure loss of the cascade outlet by 17.63%.
作者
庞文瑄
陆华伟
宋洪达
郭爽
王宇
杨帆
PANG Wen-xuan;LU Hua-wei;SONG Hong-da;GUO Shuang;WANG Yu;YANG Fan(Naval Architecture and Marine Engineering College,Dalian Maritime University,Dalian 116026,China;School of Aeronautics and Astronautics,Dalian University of Technology,Dalian 116024,China)
出处
《大连海事大学学报》
CAS
CSCD
北大核心
2019年第2期77-84,共8页
Journal of Dalian Maritime University
基金
国家自然科学基金资助项目(51506022
51676023)
辽宁省自然科学基金资助项目(201602078)
中央高校基本科研业务费专项资金资助项目(3132018203
DUT16K08)
关键词
静叶叶栅
凹坑尺寸
损失特性
数值研究
static cascade
dimple size
loss performance
numerical study
