摘要
数值研究低速条件下边界层吸除对某高负荷压气机叶栅气动性能的影响。对该高负荷压气机叶栅原型进行数值研究,通过与前期试验数据的对比,校核商业计算流体力学(Computational fluid dynamics,CFD)计算代码的可靠性。结果表明,计算得到的性能曲线与试验数据有较好的一致性,所应用的数值模拟手段是可行的;分析不同正冲角时叶栅出口总压损失的分布,并给出吸力面及端壁极限流线。结果表明,边界层吸除可有效改善叶栅气动性能,低能流体被吸除使得吸力面及角区的分离减小,且叶栅总压损失显著减小;随着冲角的增加,较小的吸气量不能实现叶栅性能较大的提升,需要增大吸气量才能有效削弱流动分离;在+10°冲角时,边界层吸除对大分离情况下的流场控制作用明显减弱,小吸气量时甚至使得压气机气动性能恶化。
The effects of boundary layer suction on the aerodynamic performance of low-speed compressor cascade with highly loading are numerically studied.The baseline compressor is considered to perform a numerical investigation and by comparing with the experimental data available from literature,the reliability of commercial computational fluid dynamics（CFD） computational code is validated.The results show that computed performance maps achieve a good agreement with the experimental data,so it＇s practicable by using the means of numerical simulations on the study.The distributions of exit total pressure loss at different positive incidences are analyzed,and the limited streamline at suction surface and end wall also are given.The results show that boundary layer suction improves effectively the aerodynamic performance of compressor cascade,and the flow separation at the corner will be restrained for low-energy flow aspirated,which results in the decrease of total pressure loss at exit.As incidence increases,greater performances improvement can＇t be achieved by a smaller suction rate,unless the suction flow rate is increased.At ＋10° incidence,the flow control ability is weaken for the strong separation condition by boundary layer suction,and the aerodynamic performance in compressor is even worse at a smaller suction rate.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2011年第20期177-182,共6页
Journal of Mechanical Engineering
基金
国家高技术研究发展计划(863计划
2008AA5A302)
国家重点基础研究发展计划(973计划
2007CBZ10104)
中央高校基本科研业务费专项基金(HIT.NSRIF.2010033)
关键词
数值研究
吸附式压气机
边界层抽吸
流动分离
Numerical investigation Aspirated compressor Boundary layer suction Flow separation
作者简介
陈绍文（通信作者），男，1979年出生，博士，讲师。主要研究方向为叶轮机械设计及流动控制机理。E-mail：cswemail@hit．edu．cn
王松涛，男，1971年出生，博士，教授，博士研究生导师。主要研究方向为叶轮机械设计及流动控制机理。E-mail：wang_stao@126．com
