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Oscar Bermejo, Juan Manuel Gallardo, Adrian Sotillo, Arnau Altuna, Roberto Alonso and Andoni Puente
Labyrinth seals are commonly used in turbomachinery in order to control leakage flows. Flutter is one of the most dangerous potential issues for them, leading to High Cycle Fatigue (HCF) life considerations or even mechanical failure. This phenomenon dep...
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Chunrui Liu, Lidong He, Xingyun Jia, Haozhe Zhu, Tao Chen and Wenhao Wang
The rotary seal is a key component of the aero engine. Under actual working conditions, most rotary seals always operate in an eccentric state (caused by installation errors), and when a large eccentricity occurs, it may lead to a large amount of gas lea...
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Yicheng Yang, Zhaoguo Mi, Wencan Zhang, Jiaqi Chang, Yongjun Liu, Bintao Zhong and Weihua Yang
The labyrinth-honeycomb seals have been widely used in aero-engine. However, radial cracks appear on labyrinth seal fins of shrouded turbine blade in use. To clarify the rubbing mode of radial crack initiation, a high-speed rubbing test bench was designe...
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Yizhen Zhao and Chunhua Wang
To reduce gas leakage, shape optimization of a straight labyrinth seal was carried out. The six design parameters included seal clearance, fin width, fin height, fin pitch, fin backward, and forward expansion angle. The CFD (Computational Fluid Dynamics)...
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Shimin Gao and Yanrong Wang
The blisks and labyrinth seals in gas turbine engines are typical rotating periodic structures. Vibration problems will inevitably occur during the operation, which can easily lead to High Cycle Fatigue failure of the structure. Adding ring damper is an ...
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Xiaolei Song, Meihong Liu, Xiangping Hu, Xueliang Wang, Taohong Liao and Junfeng Sun
In order to improve efficiency in turbomachinery, brush seal replaces labyrinth seals widely in the secondary air system. A 2-d staggered tube bank model is adopted to simulate the gas states and the pressure character in brush seal, and computational fl...
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Moch. Faqih, Nu Rhahida Arini, Hendrik Elvian Gayuh Prasetya
Pág. 268 - 282
A steam turbine is the most critical component in a thermal power plant. Due to its crucial function, it should be maintained to be able to operate without failure. This paper aims to develop an application that can be used to analyze the reliability and...
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Sergey Kartashov, Yuri Kozhukhov, Vycheslav Ivanov, Aleksei Danilishin, Aleksey Yablokov, Aleksey Aksenov, Ivan Yanin and Minh Hai Nguyen
In this paper, we review the problem of accounting for heat exchange between the flow and the flow part surfaces when creating a calculation model for modeling the workflow process of low-flow stages of a centrifugal compressor using computational fluid ...
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Qiuwan Du and Di Zhang
The leakage problem of supercritical carbon dioxide (SCO2) axial-inflow turbine brings great challenges to the efficiency and security of the power system. Labyrinth seals are usually utilized to improve the leakage characteristics of the blade tip. In t...
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Oliver Munz, Tim Pychynski, Corina Schwitzke and Hans-Jörg Bauer
Labyrinth seals are a state-of-the-art sealing technology to prevent and control leakage flows at rotor–stator interfaces in turbomachinery. Higher pressure ratios and the economical use of cooling air require small clearances, which lead to potent...
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