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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical investigation on the effect of radial location of sealing air inlet and its geometry on the sealing performance of a stator-well cavity
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Numerical investigation on the effect of radial location of sealing air inlet and its geometry on the sealing performance of a stator-well cavity

机译：密封进气口的径向位置及其几何形状对定子腔空腔密封性能影响的数值研究

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摘要

This paper investigates the mainstream hot gas ingestion into a new stator-well cavity which consists of upstream and downstream rim cavities as well as a pre-swirl cavity. The effects of the radial location of sealing air inlet hole and the shape of sealing air supply geometry on the flow characteristics and sealing performance of the stator-well cavity have been investigated. Computations are performed for three radius ratios of sealing air inlet-to-rim seal periphery of 0.883, 0.909 and 0.935 and three sealing air supply geometries in terms of hole design and slot design with two height-to-width ratios of 12 and 21. The results indicate that both the radial location of sealing air inlet hole and the shape of sealing air supply geometry has a significant effect on the flow characteristics and sealing performance in the upstream rim cavity, while it negligibly affects the flow structure and sealing effectiveness in the downstream rim cavity. For upstream rim cavity, it is more effective to protect upper walls for the inlet hole at a higher radius, and the sealing effectiveness on inner walls is higher for the inlet hole at a lower radius. Additionally, the slot design shows a lower sealing effectiveness on upper walls than that of the hole design, and with an increase in height-to-width ratio it further decreases. However, the slot design is of benefit to the protection of inner walls as well as the performance of pre-swirl cavity, and as height-to-width ratio increases the sealing effectiveness on inner walls increases.
机译：本文研究了进入新的定子井腔的主流热气，该定子井腔由上游和下游轮辋腔以及预旋腔组成。研究了密封空气入口孔的径向位置和密封空气供应几何形状对定子孔腔流动特性和密封性能的影响。根据孔设计和槽设计的三种高度和宽度比例分别为12和21的密封空气入口与边缘密封边缘的三个半径比分别为0.883、0.909和0.935以及三种密封空气供应几何形状进行计算。结果表明，密封进气孔的径向位置和密封气源的几何形状对上游轮辋腔的流动特性和密封性能都有显着影响，而对进气道的流动结构和密封效果影响很小。下游轮辋腔。对于上游轮辋腔，在较大半径处保护进气孔的上壁是更有效的，而在较小半径处，进气孔的内壁的密封效果较高。另外，缝隙设计在上壁上的密封效果比孔设计低，并且随着高宽比的增加，缝隙设计进一步降低。然而，狭槽设计有利于保护内壁以及预旋腔的性能，并且随着高宽比的增加，在内壁上的密封效果也增加。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2017年第ptab期|820-832|共13页
  • 作者

    Feng Zhang; Xinjun Wang; Jun Li; Daren Zheng;

  • 作者单位

    Institute of Turbomachinery, Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China;

    Institute of Turbomachinery, Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China;

    Institute of Turbomachinery, Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China;

    Institute of Turbomachinery, Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, 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

    Rim seal; Sealing effectiveness; Stator-well cavity; Numerical study; Inlet radial location and geometry; Industrial gas turbine;

    机译：轮辋密封;密封效果;定子井腔;数值研究;进气口的径向位置和几何形状;工业燃气轮机;

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