摘要
轮缘密封作为燃气透平二次空气系统的重要部件,可以有效抑制燃气入侵、防止轮盘过热,因而得到重视。介绍了透平轮缘密封外环诱导和旋转诱导燃气入侵的机理,展示了燃气透平动盘上下游腔室的流动图谱。综述了轮缘密封燃气入侵和封严效率的实验测量和数值模拟研究进展,介绍了具有高封严效率的轮缘密封结构设计。总结了燃气透平轮缘密封技术的研究结论,并展望了轮缘密封技术在抑制燃气入侵和提高封严效率方面需要加强和深化的研究工作,研究总结可为燃气透平轮缘密封技术性能分析和结构设计提供参考。
Rim seal is one of the important components of secondary air system of gas turbine,which can efficiently suppress the hot gas ingress and prevent the over heat of wheel space disk.The mechanisms of the externally-induced and rotationally-induced ingress through turbine rim seals are firstly introduced.The flow pattern in the wheel space disk cavity upstream and downstream of the rotational disk is illustrated.The state-of-art of the experimental measurements and numerical simulations on the hot gas ingress and sealing effectiveness of turbine rim seals is reviewed.The high performance of rim seal structure design is also presented.Some research achievements of turbine rim seals are concluded.The further research works on turbine rim seals to suppress hot gas ingress and improve the sealing effectiveness is addressed.This review can provide reference for performance analysis and structure design of the rim seal in gas turbine.
作者
李军
程舒娴
高庆
李志刚
晏鑫
LI Jun;CHEN Shuxian;GAO Qing;LI Zhigang;YAN Xin(Institute of Turbomachinery,Xi’an Jiaotong University,Xi’an 710049,Chin;Collaborative Innovation Center of Advanced Aero-Engine,Beijing 100191,China;Xi’an TPRI Energy Conservation Technology Co.,Ltd.,Xi’an 710049,China)
出处
《热力透平》
2018年第1期6-15,共10页
Thermal Turbine
基金
国家自然科学基金项目(51776151)
关键词
透平
轮缘密封
燃气入侵
封严效率
结构设计
turbine
rim seal
gas ingress
sealing effectiveness
structure design
