...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of turbomachinery >Test Rig for Applied Experimental Investigations of the Thermal Contact Resistance at the Blade-Rotor-Connection in a Steam Turbine
【24h】

Test Rig for Applied Experimental Investigations of the Thermal Contact Resistance at the Blade-Rotor-Connection in a Steam Turbine

机译：用于试验研究汽轮机叶片-转子连接处的热接触电阻的试验装置

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Recent studies have shown that in a prewarming, respectively, warm-keeping operation of a steam turbine, the blades and vanes transport most of the heat to the thick-walled casing and rotor. Thereby, a thermal bottle-neck arises at the connection between the blade root and the rotor. The thermal contact resistance (TCR) at these interfaces affects the temperature distribution and thus the thermal stresses in the rotor. The present paper introduces an experimental setup, which is designed to quantify the TCR at the bladerotor-connection of a steam turbine. An uncertainty analysis is presented, which proves that the average measurement uncertainties are less than one percent. The experiments especially focus on the investigation of the contact pressure, which is a function of the rotational speed. Therefore, the results of several steady-state measurements under atmospheric and evacuated atmosphere using a high temperature-resistant chromium-molybdenum steel are presented. For the evaluation of the TCR, a numerical model of the specimen is developed in addition to a simplified 1D approach. The results show a significantly increasing TCR with decreasing contact pressure, respectively, rotational speed.
机译：最近的研究表明，在汽轮机的预热，保温操作中，叶片和叶片将大部分热量传递到厚壁的壳体和转子。由此，在叶根和转子之间的连接处出现热瓶颈。这些界面处的热接触电阻（TCR）影响温度分布，从而影响转子中的热应力。本文介绍了一种实验装置，旨在量化汽轮机叶片转子连接处的TCR。进行了不确定度分析，证明平均测量不确定度小于百分之一。实验特别着重于接触压力的研究，接触压力是转速的函数。因此，提出了使用耐高温铬钼钢在大气和真空环境下进行几种稳态测量的结果。为了评估TCR，除了简化的一维方法外，还开发了样品的数值模型。结果表明，TCR随接触压力和转速的降低而显着提高。

著录项

  • 来源
    《Journal of turbomachinery》 |2019年第2期|021007.1-021007.8|共8页
  • 作者

    Toebben Dennis; de Graaf Xavier E. R.; Luczynski Piotr; Wirsum Manfred; Mohr Wolfgang F. D.; Helbig Klaus;

  • 作者单位

    Rhein Westfal TH Aachen, Inst Power Plant Technol Steam & Gas Turbines, Templergraben 55, D-52064 Aachen, Germany;

    Rhein Westfal TH Aachen, Inst Power Plant Technol Steam & Gas Turbines, Templergraben 55, D-52064 Aachen, Germany;

    Rhein Westfal TH Aachen, Inst Power Plant Technol Steam & Gas Turbines, Templergraben 55, D-52064 Aachen, Germany;

    Rhein Westfal TH Aachen, Inst Power Plant Technol Steam & Gas Turbines, Templergraben 55, D-52064 Aachen, Germany;

    Gen Elect Switzerland GmbH Brown, Boveri St 7, CH-5401 Baden, Switzerland;

    Gen Elect Power AG, Boveristr 22, D-68309 Mannheim, Germany;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号