整级透平中转静轮缘封严问题研究PartⅡ:不同封严结构的特性  

Rotor-Stator Rim Seal Analysis in One Stage Gas Turbine Part Ⅱ:Characteristic of Different Seal Structure

作　　者：吴康[1] 任静[1] 蒋洪德[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《工程热物理学报》2015年第3期496-500,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51076076)

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。其中第二部分主要关注不同封严结构的特性。结果表明;复杂的封严结构能够避免主流和腔室内部气体的直接接触,增大主流入侵的沿程阻力和削弱主流的切向速度分量的影响。在本文的实验条件下,径向封严所需要的最小密封流量相较于轴向封严能够减少50%以上。Gas Turbine rotor stator rim seal problem was studied by using experimental and CFD method based on a one stage turbine model.Part two focused on the performance of different seal structures including axial seal,radial seal and double seal.The results showed that more complicated seal structure can stop the direct contact between the annulus flow and sealing flow.It can also increase the pressure lose during the ingestion path and weaken the effect of the tangential velocity of annulus flow.These made the radial and axial radial seal structures performance better and can saved up to 50%sealing flow,which is useful for Gas Turbine cooling design.

关 键 词：转静轮缘 轴向封严 径向封严 双封严结构 

分 类 号：TK473[动力工程及工程热物理—动力机械及工程]