摘要
为分析叶轮和扩压器耦合作用下的压气机内部流场,在级环境下对Z305增压器离心压气机进行了数值研究,结果表明该压气机的工作范围较狭窄和整级效率较低的原因在于叶轮出口段到扩压器进口处都存在较大的涡流区。通过减少扩压器叶片数和缩短叶片尾缘的长度,改善了叶轮和扩压器的耦合关系,使得压气机工作范围和在多工况下的效率和压比等性能参数都明显提高。
Numerical analysis of the internal flow field of Z305 centrifugal compressor in multistage environment was carried out.The results indicate that narrow working rang and low efficiency of the compressor contributes to the eddy between outlet of the impeller and inlet of the diffuser.The coupling relationship between the impeller and diffuser was improved by reducing vane number of the diffuser and shortening the length of the blade trailing edge.The optimal results show that the stable working range of the compressor was broadened and working efficiency and pressure ratio in multistage environment were increased significantly.
出处
《流体机械》
CSCD
北大核心
2014年第3期14-18,共5页
Fluid Machinery
基金
国家自然科学基金资助项目(11202043)
关键词
离心式压气机
叶轮
扩压器
内部流场
centrifugal compressor
impeller
diffuser
internal flow field
