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Numerical study on the biomimetic trailing edge in the environment of a high-pressure turbine stage

机译：高压涡轮阶段环境中仿生后边缘的数值研究

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摘要

In this study, the whisker structure of a harbor seal is applied to the trailing edge of a high-pressure turbine stage to reduce energy loss. The method to produce biomimetic geometry is provided. Two cases are studied in this paper including a prototype of a high-pressure turbine stage and this stage with the biomimetic trailing edge. The delayed detached-eddy simulation (DDES) method is used to simulate the flow of the stages. The energy loss coefficient of the turbine stage with the biomimetic trailing edge is significantly reduced. The analysis of the local entropy generation rate shows that the wake loss of the biomimetic stage and the loss in the blade passage are greatly reduced. Two reasons for the widening of the wake of the prototype vane during the downstream movement are analyzed. For the biomimetic stage, the Karman vortices are completely suppressed and transformed into small vortices with strong three-dimensional motion. The wake width of the biomimetic trailing edge is narrowed and the speed recovery becomes faster. This leads to the reduction of the wake loss and the interaction between the wake of the vane and the downstream blade. (C) 2021 Elsevier Masson SAS. All rights reserved.
机译：在该研究中，港口密封的晶须结构被施加到高压涡轮级的后缘，以减少能量损失。提供了产生仿生几何形状的方法。本文研究了两种情况，包括高压涡轮级的原型和具有仿真后缘的阶段。延迟的分离涡模拟（DDES）方法用于模拟阶段的流程。具有仿生后缘的涡轮级的能量损失系数显着降低。对局部熵产生率的分析表明，生物摩擦阶段的唤醒损失和刀片通道的损失大大降低。分析了在下游运动期间引入原型叶片尾之一的两个原因。对于仿生阶段，Karman涡流被完全抑制和转化为具有强三维运动的小涡旋。染色后缘的唤醒宽度变窄，速度恢复变得更快。这导致唤醒损失的减小和叶片的唤醒和下游叶片之间的相互作用。 （c）2021 Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2021年第8期|106770.1-106770.13|共13页
  • 作者

    Luo Yuxi; Wen Fengbo; Wang Shuai; Hou Rui; Wang Songtao; Wang Zhongqi;

  • 作者单位

    Harbin Inst Technol Sch Energy Sci & Engn Harbin Peoples R China;

    Harbin Inst Technol Sch Energy Sci & Engn Harbin Peoples R China;

    Harbin Inst Technol Sch Energy Sci & Engn Harbin Peoples R China;

    Harbin Inst Technol Sch Energy Sci & Engn Harbin Peoples R China;

    Harbin Inst Technol Sch Energy Sci & Engn Harbin Peoples R China;

    Harbin Inst Technol Sch Energy Sci & Engn Harbin 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

    Biomimetic trailing edge; Harbor seal whisker; Wake loss; Turbine stage;

    机译：仿生后缘;港口密封晶须;唤醒损失;涡轮阶段;

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