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首页> 外文会议>International conference on transportation engineering >Numerical Analysis of the Internal Flow Field of a Marine Centrifugal Compressor and the Structural Optimization of a Vaned Diffuser
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Numerical Analysis of the Internal Flow Field of a Marine Centrifugal Compressor and the Structural Optimization of a Vaned Diffuser

机译：船用离心压缩机内部流场的数值分析与叶片扩压器的结构优化。

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摘要

Due to coupling effect and interaction between the impeller and diffuser, internal flow field of a centrifugal compressor is very complicated. In the present thesis, numerical analysis of the internal flow field of a marine centrifugal compressor in multistage environment was carried out. The results indicate that narrow working rang and low efficiency of the prototypical 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.
机译：由于叶轮和扩散器之间的耦合作用和相互作用，离心压缩机的内部流场非常复杂。本文对船用离心压缩机在多级环境下的内部流场进行了数值分析。结果表明，原型压缩机的工作范围窄且效率低，这有助于叶轮出口与扩散器入口之间产生涡流。通过减少扩散器的叶片数量并缩短叶片后缘的长度，改善了叶轮与扩散器之间的耦合关系。最佳结果表明，压缩机的稳定工作范围得到了扩大，多级环境下的工作效率和压力比也显着提高。

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