涡轮蜂窝面径向轮缘密封封严性能的数值研究

推进技术 ›› 2016, Vol. 37 ›› Issue (5): 937-944.

涡轮蜂窝面径向轮缘密封封严性能的数值研究

高庆¹,李军^1,2

西安交通大学能源与动力工程学院，陕西西安 710049,西安交通大学能源与动力工程学院，陕西西安 710049; 先进航空发动机协同创新中心，北京 100191

发布日期:2021-08-15
作者简介:高庆，男，博士生，研究领域为气动热力学与流热耦合分析。
基金资助:
国家自然科学基金资助项目(51376144)。

Numerical Investigations on Sealing Performance of

School of Energy & Power Engineering，Xi’an Jiaotong University，Xi’an 710049，China and School of Energy & Power Engineering，Xi’an Jiaotong University，Xi’an 710049，China; Collaborative Innovation Center of Advanced Aero-Engine，Beijing 100191，China

Published:2021-08-15

摘要/Abstract

摘要： 采用附加示踪变量方法，数值求解三维Unsteady Reynolds-Averaged Navier-Stokes (URANS) 方程和SST紊流模型，研究了典型光滑面径向轮缘密封和新设计的蜂窝面径向轮缘密封的封严性能。数值计算了光滑面轮缘密封的封严效率。数值结果与实验数据吻合一致，验证了所发展数值方法的有效性。计算了三种封严冷气量下蜂窝面和光滑面径向轮缘密封的封严效率，分析对比了两种轮缘密封的封严性能和流场特性。研究结果表明:新设计的蜂窝面径向轮缘密封的封严效率相比于光滑面结构在相同冷气量下提高52% ~ 67%。在径向内齿上开设蜂窝孔结构会增加流动阻力，抑制入侵燃气进入涡轮盘腔，有效地提高了轮缘密封的封严性能。

关键词: 涡轮；蜂窝面径向轮缘密封；封严性能；数值模拟

Abstract: The sealing performance of the typical smooth and new designed honeycomb radial rim seal was numerically investigated using three-dimensional Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations and SST turbulent model based on the Additional Passive Tracer Method. The sealing effectiveness of the experimental measurement rim seal was calculated using the presented numerical method. The numerical results agree well with the experimental data. The validation of the developed numerical approach for the sealing effectiveness was demonstrated. The sealing effectiveness of the smooth and honeycomb radial rim seal was computed at three different coolant mass flow ratios. The sealing performance and internal flow field of the two kinds of radial rim seals were also compared and analyzed. The numerical results show that the sealing effectiveness of the honeycomb radial rim seal is higher than that of the smooth design with 52% ~ 67% at the same coolant mass flow ratio. The honeycomb structure would lead to increase of flow resistance in the radial clearance，which is beneficial to suppressing mainstream ingress into the turbine wheel disc and significantly increase the sealing performance by comparison of the typical smooth rim seal design.

Key words: Turbine；Honeycomb radial rim seal；Sealing performance；Numerical simulation

高庆,李军. 涡轮蜂窝面径向轮缘密封封严性能的数值研究[J]. 推进技术, 2016, 37(5): 937-944.

GAO Qing¹,LI Jun^1,2. Numerical Investigations on Sealing Performance of[J]. Journal of Propulsion Technology, 2016, 37(5): 937-944.

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