...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Thermal engineering >Study into the Separation Ability of the New NRU MPEI Peripheral Sealing
【24h】

Study into the Separation Ability of the New NRU MPEI Peripheral Sealing

机译：研究新的NRU MPEI外周密封的分离能力

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

Abstract Energy losses caused by steam humidity are one of the main components of losses in the steps of nuclear power plants’ wet-steam turbines. The presence of moisture droplets in the flow part of the turbines also poses a serious danger due to erosion wear of their blades. Various separation systems remove part of the erosion-hazardous moisture. However, along with moisture, a certain amount of steam is removed from the flow part of the turbine, which will not take part in performing beneficial work in subsequent stages of this turbine. Other losses are steam leaks through seals, the largest of which occur in seals located above the turbine blades. On the basis of the rectangular-mesh seals developed and studied earlier, the design of a special peripheral seal for NPP turbines was developed at NRU MPEI. The new seal is capable of simultaneously performing two functions: to reduce over-leakage leaks and to ensure the separation of moisture from the flowing part. The results of the studies showed that the presence of special channels in the seal for removing drip moisture hardly worsen the flow characteristics of the new seal. This paper presents the results of experimental studies into the separation ability of new peripheral seals. As a two-phase medium, specially prepared moist air was used. To do this, a plant for the preparation of water and the generation of the droplet phase was designed and manufactured. During the experiments, the ability of the seal structure to remove moisture was investigated. The use of humidified air made it possible to accurately determine the amount of droplet moisture supplied to the seal and separated through it and the separation coefficient of the seal. Studies have shown that the amount of moisture separated through the seal depends on the pressure drop across it, the rotor speed, and the initial degree of humidity of the compressed air supplied to the seal. It is shown that the use of a new seal in the studied range of initial degrees of humidity allows the separation of up to 45% of the moisture passing through the peripheral gap above the working blades. In general, the results of the experiments showed that the use of a rectangular-cell seal from NRU MPEI as a peripheral seal in turbines of nuclear power plants is advisable to remove moisture from the gap above the working blade and to reduce peripheral steam leaks.
机译：摘要蒸汽湿度引起的能量损失是核电站湿汽轮机步骤中损失的主要组成部分之一。由于叶片的侵蚀磨损，涡轮机的流动部分中的水滴的存在也存在严重的危险。各种分离系统消除了部分侵蚀危险的水分。然而，随着水分，从涡轮机的流动部分除去一定量的蒸汽，这将不会参与在该涡轮机的后续阶段进行有益的工作。其他损失是蒸汽通过密封件泄漏，其中最大的密封件在涡轮叶片上方发生。在早期开发和研究的矩形网眼的基础上，在NRU MPEI开发了NPP涡轮机的特殊外围密封件的设计。新密封能够同时执行两种功能：减少过泄漏泄漏，并确保水分与流动部件分离。研究结果表明，用于去除滴水水分的密封件中的特殊通道的存在几乎不会使新密封的流动特性恶化。本文介绍了新周边密封件的分离能力的实验研究结果。作为两阶段培养基，使用了特别制备的潮湿空气。为此，设计并制造了一种用于制备水的植物和液滴阶段的产生。在实验期间，研究了密封结构去除水分的能力。加湿空气的使用使得可以精确地确定供应到密封的液滴水分的量并通过它分离和密封的分离系数。研究表明，通过密封分离的水分量取决于其上的压降，转子速度和供应到密封件的压缩空气的初始湿度。结果表明，在研究的初始湿度范围内使用新密封件允许将长达45％的水分分离在工作叶片上方的周边间隙中。通常，实验结果表明，使用来自NRU MPEI的矩形细胞密封作为核电站涡轮机中的周边密封，建议从工作刀片上方的间隙中移除水分并减少外周蒸汽泄漏。

著录项

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