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Evaluation of the effectiveness of typical casing treatments for a low-speed compressor by an integral method

机译：通过积分法评估低速压缩机典型机匣处理的有效性

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摘要

A novel integral method is proposed to quickly assess the effectiveness on stability improvement with end-wall casing treatments. With this low-cost method, efficacies for various casing treatment configurations can be evaluated instead of calculating the entire performance curves, which can be used in place of expensive and costly experiments. The underlying mechanism for this approach is based on the hypothesis that the spike stall precursors can be triggered by the forward spillage of the rotor tip leakage flow, and the onset condition of such a spillage is determined by the axial momentum balance within the rotor tip region. Based on the simulation, a series of control volumes are set at the rotor tip region in order to catch the axial momentum balance between the incoming main flow and the reversed tip leakage flow. Cumulative axial momentum distributions for these control volumes named as "bell-shaped curves" are presented to evaluate the effectiveness of different configurations. The axial location of the bell curve peak indicates the time- and spatial-averaged interface position between the main flow and tip leakage flow, which moves upstream during throttling. Three types of typical casing treatments: multiple circumferential grooves, skewed axial slots and self-injection configurations for a low-speed in-house compressor are evaluated by their bell-shaped curves. Among these configurations, the skewed axial slots has the most downstream of the peak, followed by the multiple-grooves, while the self-injection configuration shows the least. Based on an existed experimental result for a double-groove configuration, the effectiveness of the three studied casing treatments are predicted by their locations of the bell-shape curve's peak without simulating the entire performance curves. The assessments are then validated by experiments. (C) 2016 Elsevier Masson SAS. All rights reserved.
机译：提出了一种新颖的积分方法，以快速评估端壁套管处理对提高稳定性的有效性。使用这种低成本方法，可以评估各种套管处理配置的效率，而不用计算整个性能曲线，而可以代替昂贵和昂贵的实验来使用整个性能曲线。此方法的基本机制基于这样的假设：尖峰失速前兆可以由转子尖端泄漏流的正向溢出触发，而这种溢出的发生条件取决于转子尖端区域内的轴向动量平衡。 。基于模拟，在转子叶尖区域设置了一系列控制量，以捕获进入的主流与反向叶尖泄漏流之间的轴向动量平衡。这些控制量的累积轴向动量分布称为“钟形曲线”，用于评估不同配置的有效性。钟形曲线峰值的轴向位置指示主流和尖端泄漏流之间的时间和空间平均界面位置，该位置在节流期间向上游移动。通过其钟形曲线评估了三种典型的套管处理方法：多个圆周凹槽，偏斜的轴向槽以及低速室内压缩机的自注入配置。在这些配置中，倾斜的轴向槽在峰的下游最多，其次是多槽，而自注入配置显示的最少。根据现有的双槽结构实验结果，通过三种钟形曲线峰值的位置可以预测三种研究套管方法的有效性，而无需模拟整个性能曲线。然后通过实验验证评估。 （C）2016 Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2016年第5期|234-242|共9页
  • 作者

    Xi Nan; Ning Ma; Li JiChao; Le Liu; Feng Lin;

  • 作者单位

    Chinese Acad Sci, Inst Engn Thermophys, Key Lab Adv Energy & Power, Beisihuanxi Rd 11, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Inst Engn Thermophys, Key Lab Adv Energy & Power, Beisihuanxi Rd 11, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Engn Thermophys, Key Lab Adv Energy & Power, Beisihuanxi Rd 11, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Inst Engn Thermophys, Key Lab Adv Energy & Power, Beisihuanxi Rd 11, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Inst Engn Thermophys, Key Lab Adv Energy & Power, Beisihuanxi Rd 11, Beijing 100190, 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

    Control volume method; Stall margin improvement (SMI); Casing treatment; Axial momentum; Bell-shaped curves;

    机译：控制体积法;失速裕度改善（SMI）;套管处理;轴向动量;钟形曲线;

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