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首页> 外文期刊>Aerospace science and technology >Performance enhancement of a centrifugal compressor stage using profiled end wall (PEW) treatments in the radial vaned diffuser
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Performance enhancement of a centrifugal compressor stage using profiled end wall (PEW) treatments in the radial vaned diffuser

机译：在径向叶片扩散器中使用异形端壁（PEW）处理的离心压缩机阶段的性能提高

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摘要

Profiled End Wall (PEW) is an effective method that has been employed in recent years in the field of axial flow turbines as a means to reduce secondary flows and associated losses leading to improved efficiency. However, the application of end wall contouring to control the flow field in the radial vaned diffuser of a centrifugal compressor is new and no previous research has been found for this topic. The centrifugal compressor is the most extensively produced type of high-speed turbomachine and is therefore very important for power and propulsion applications. In order to reveal the impact of PEW on the performance and working range of centrifugal compressors, this study reports the outcomes of numerical simulations that were conducted for different PEW treatments and benchmarked against experimental data from the exemplar open test case known as 'Radiver'. The results show the potential for the compressor operating range to be significantly extended by up to 39% in PEW cases with no significant decrease in efficiency or pressure ratio. (C) 2020 Elsevier Masson SAS. All rights reserved.
机译：成型端壁（PEW）是近年来在轴流涡轮机领域中采用的有效方法，作为减少次级流动和相关损耗的装置，导致提高效率。然而，在离心式压缩机的径向叶片扩散器中控制端壁轮廓控制流场是新的，并且没有找到先前的研究。离心式压缩机是最广泛生产的高速涡轮机类型，因此对于电源和推进应用非常重要。为了揭示PEW对离心式压缩机的性能和工作范围的影响，本研究报告了用于不同PEW治疗的数值模拟的结果，并根据称为“辐射”的示例性开放测试用例的实验数据进行基准测试。结果表明，压缩机工作范围的潜力在PEW病例中显着延长高达39％，效率或压力比没有显着降低。 （c）2020 Elsevier Masson SAS。版权所有。

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