| 整级透平中转静轮缘封严问题研究PartⅠ:封严与入侵 | |
| 吴康 ; 任静 ; 蒋洪德 ; J Michael Owen ; WU Kang ; REN Jing ; JIANG Hong-De ; J Michael Owen | |
| 2016-03-30 ; 2016-03-30 | |
| 关键词 | 整级透平 转静轮缘 封严与入侵 动盘夹带效应 one stage turbine rotor-stator rim seal ingestion and rim seal entrainment effect TK471 |
| 其他题名 | Rotor-Stator Rim Seal Analysis in One Stage Gas Turbine Part I:Ingestion and Seal |
| 中文摘要 | 本文通过构建由一级动静叶组成的外流影响下的轮缘密封问题的实验和数值模型,针对燃气轮机透平转静轮盘间隙的封严与入侵问题开展了研究。其中第一部分主要关注燃气入侵的主要影响因素,入侵气体在腔室内部的分布规律和最小封严流量。结果表明:静叶尾缘的压力分布是造成燃气入侵的主要原因,即在主流的压力大于密封腔室内压力的区域会出现燃气侵入腔室,造成局部温度过高;主流压力小于腔室内部的压力区域,密封气体能够较好的封严转静间隙。入侵气体和封严气体的掺混主要发生在腔内高半径处并在高速旋转的动盘引发的夹带作用下深入腔室内部低半径处。因此在轮缘密封的结构设计中需要全面的考虑这些因素的影响。; Gas Turbine rotor stator rim seal problem was studied by using experimental and CFD method based on a one stage turbine model.Part one focused on the mechanism of ingestion and distribution of ingested flow in rotor stator cavity.The results showed that the non-uniform pressure distribution of annulus flow is the main factor cause hot gas ingestion.The cavity can be well sealed when the pressure in it is higher than that of annulus flow,otherwise the ingestion happens.The tangential velocity of main flow will enhance the ingestion process.The mixing process between sealing flow and ingestion flow happens near the seal clearance and then goes into the lower location of the cavity by the entrainment effect induced by rotor disc.All these factors should be considered and well organized when new and highly efficient rim seal structure is designed. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144941]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 吴康,任静,蒋洪德,等. 整级透平中转静轮缘封严问题研究PartⅠ:封严与入侵[J],2016, 2016. |
| APA | 吴康.,任静.,蒋洪德.,J Michael Owen.,WU Kang.,...&J Michael Owen.(2016).整级透平中转静轮缘封严问题研究PartⅠ:封严与入侵.. |
| MLA | 吴康,et al."整级透平中转静轮缘封严问题研究PartⅠ:封严与入侵".(2016). |
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