摘要
针对某系列Zweifel数约为1.6的超高负荷低压涡轮叶型,分别对其在定常来流条件下、上游尾迹扫掠条件下的二维流动开展了数值研究.计算结果表明,在低雷诺数、低湍流度工作环境下,叶片吸力面存在较大层流分离,且前加载叶型二维气动性能优于后加载叶型.同时,上游尾迹扫掠对超高负荷低压涡轮叶型分离流动控制作用有限,需引入新的流动控制方法.研究结果对超高负荷低压涡轮设计有较好的启示.
Two ultra-high lifted low-pressure turbine(LPT) profile with Zweifel lift coefficient of approximately 1.6 are numerically studied at steady and unsteady inflow conditions. The results show that there is always a layer separation bubble located at airfoil suction side for the condition of low Reynolds number and low turbulence intensity. The frond-loaded airfoil is proved to have better profile performance. Besides, the inhabiting effect of unsteady wake to flow separation is insufficient for the ultra-high lifted low-pressure turbine profile and new flow control methods is suggested here.The investigation is believed to be useful to the design of ultra-high lifted low-pressure turbine profile.
作者
李紫良
柴猛
朱俊强
LI Zi-Liang;CHAI Meng;ZHU Jun-Qiang(Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,CHINA;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2018年第12期2603-2610,共8页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51476166)
关键词
低压涡轮
超高负荷叶型
非定常尾迹
流动控制
分离泡
low-pressure turbine
ultra-high lifted airfoil
unsteady wake
flow control
separation bubble
