级环境下叶片表面粗糙度对压气机气动性能的影响  

Influence of Blade Surface Roughness on Aerodynamic Performance of Centrifugal Compressor under Stage Environment

作　　者：韩菲[1] 杜礼明[1] 李文娇[1] 李成[1] 

机构地区：[1]大连交通大学辽宁省高等学校载运工具先进技术重点实验室,辽宁大连116028

出　　处：《大连交通大学学报》2015年第2期47-51,共5页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(11202043)

摘　　要：采用数值方法,在压气机级环境下研究了叶片表面粗糙度对压气机内部流场及特性参数的影响.结果表明,叶片粗糙度对压气机的主要性能参数影响明显;随着叶片粗糙度的增大,压气机级性能衰减加剧,叶轮叶片表面粗糙度增加到100μm以上时,在近失速工况下压气机的总压比和等熵效率下降达10%以上,压气机内气流能量损失增大,尤其是靠近叶轮前缘中上部的气流能量损失严重,同时引起叶片端壁温度升高.Influence of blade surface roughness on internal flow field and aerodynamic performance of a centrifugal compressor was numerically studied in compressor stage environment. The results show that the blade roughness has great influence on the key performance parameters of the compressor, such as total pressure ratio and efficiency. With the increase of the blade roughness, the attenuation speed of the pressure ratio and efficiency increases, and the total pressure ratio and isentropic efficiency is decreased by more than 10% in near stall condition when the blade surface roughness increases to more than 100 μm. It also indicates that energy loss of the internal airflow in the compressor increases, especially energy loss of the airflow is serious in the middle and upper parts near the impeller leading edge, resulted in temperature rise in the side walls.

关 键 词：叶片表面粗糙度 离心压气机 级环境 内部流场 气动性能 

分 类 号：TH45[机械工程—机械制造及自动化]