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首页> 外文期刊>Advances in Mechanical Engineering >A study of off-design performance improvement for a centrifugal refrigerant compressor:
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A study of off-design performance improvement for a centrifugal refrigerant compressor:

机译：对离心式制冷剂压缩机的非设计性能改进研究：

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This study numerically investigates the effects of changing vaned diffuser angles and vaneless diffuser widths of a two-stage centrifugal refrigerant compressor on the reduction of surge flow rate and the improvement of part-load performance. The first stage has a low-solidity vaned diffuser, while the second stage has a vaneless diffuser. The analysis results show that adjusting the angle of low-solidity vaned diffuser in the first stage can lower the surge flow rate and keeps high efficiencies at low flow rates. The inlet guide vane of the first stage can also lower the surge flow rate; however, their simultaneous actuation cannot lower the surge flow rate further. Reducing the vaneless diffuser width of the second stage can lower the surge flow rate. Meanwhile, simultaneously adjusting the individual inlet guide vanes of the second stage can also effectively lower the surge flow rate. If the diffuser width of the first stage is reduced while the low-solidity vaned diffuser blade angle is fixed, the sur...
机译：该研究数值研究了两级离心式制冷剂压缩机改变了叶片扩散器角度和无差扩散器宽度的效果在降低浪涌流动速率和改善部分负载性能的情况下。第一阶段具有低固态的叶片扩散器，而第二级具有无差漫射器。分析结果表明，调节第一阶段中的低固态叶片扩散器的角度可以降低浪涌流速并保持低流量效率。第一级的入口导向叶片也可以降低浪涌流量;然而，他们的同时致动进一步不能降低浪涌流速。减小第二阶段的无差漫射宽度可以降低浪涌流速。同时，同时调节第二阶段的单独入口导叶片也可以有效地降低浪涌流量。如果第一级的漫射器宽度减小，而低固识叶片扩散器叶片角度固定，则SUR ...

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