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Effect of casing treatment to switch the type of instability inception in a high-speed axial compressor

机译：套管处理在高速轴流压缩机中切换不稳定初始化的影响

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摘要

Flow instability phenomena, such as surge and rotating stall, limit the operating range of compressors. Casing treatment is a commonly used technique to extend the operating range, and some corresponding physical explanations have been proposed for the effects of casing treatment on the flow field in compressors. While there is also a situation that a casing treatment that is effective for one compressor may be useless for another, as a result, which limits the practical application of casing treatments. Based on the knowledge that the radial distribution of blade loading has a great influence on the type of instability inception, a hypothesis is put forward: casing treatment could change the type of instability inception by altering the loading distribution, and the resulting influence on the occurrence of instability may be one of the reasons to explain some unsuccessful tests of casing treatment. This hypothesis is then verified experimentally and numerically in a transonic axial flow compressor operating at a specific speed where the loading of both rotor tip and stator hub is close to each critical value. The results present that casing treatment can alter the type of instability inception by redistributing the blade loading, and thus leads to an earlier part-span stall in the hub region for this compressor. The main concluding remarks in this paper could be practically beneficial for the design of casing treatment in compressors. (C) 2021 Elsevier Masson SAS. All rights reserved.
机译：流动不稳定现象，如浪涌和旋转失速，限制了压缩机的操作范围。套管处理是一种常用的技术来延长操作范围，并且已经提出了一些相应的物理解释，用于壳体处理对压缩机流场的影响。虽然也存在对一个压缩机有效的套管处理可能是另一个的，但是，这限制了套管处理的实际应用。基于刀片载荷的径向分布对不稳定初始类型影响的知识，提出了一个假设：套管处理可以通过改变装载分布来改变不稳定初始化的类型，并导致对发生的影响不稳定性可能是解释套管处理的一些不成功测试的原因之一。然后在实验上验证该假设，并且在数值上验证在以特定速度操作的跨音轴流压缩机，其中转子尖端和定子毂的负载接近每个临界值。结果存在，壳体处理可以通过重新分配叶片装载来改变不稳定性初始化的类型，从而导致该压缩机的毂区域中的早期部分跨度摊位。本文的主要结论备注实际上是有利于压缩机套管处理的设计。 （c）2021 Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2021年第8期|106801.1-106801.11|共11页
  • 作者

    Pan Tianyu; Wu Wenqian; Li Qiushi;

  • 作者单位

    Beihang Univ Res Inst Aeroengine Beijing Peoples R China|Beihang Univ Natl Key Lab Sci & Technol Aeroengine Aerothermod Beijing Peoples R China;

    Beihang Univ Res Inst Aeroengine Beijing Peoples R China|Beihang Univ Sch Energy & Power Engn 37 Xueyuan Rd Beijing 100191 Peoples R China;

    Beihang Univ Res Inst Aeroengine Beijing Peoples R China|Beihang Univ Natl Key Lab Sci & Technol Aeroengine Aerothermod Beijing Peoples R China|Beihang Univ Sch Energy & Power Engn 37 Xueyuan Rd Beijing 100191 Peoples R China|Xihua Univ Key Lab Fluid & Power Machinery Chengdu Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    High-speed axial compressor; Casing treatment; Instability inception; Blade loading distribution;

    机译：高速轴流压缩机;套管处理;不稳定的初始化;刀片装载分布;

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