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Study on the Tip Leakage Loss Mechanism of a Compressor Cascade Using the Enhanced Delay Detached Eddy Simulation Method [PDF]
EntropyThe leakage flow has a significant impact on the aerodynamic losses and efficiency of the compressor. This paper investigates the loss mechanism in the tip region based on a high-load cantilevered stator cascade.
Shiyan Lin, Ruiyu Li, Limin Gao
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Blade Loading Effects on Axial Turbine Tip Leakage Vortex Dynamics and Loss [PDF]
Journal of Turbomachinery, 2012 Abstract Numerical simulations have been carried out to define the loss generation mechanisms associated with tip leakage in unshrouded axial turbines. Tip clearance vortex dynamics are a dominant feature of two mechanisms important in determining this loss: (i) decreased swirl velocity due to vortex line contraction in regions of ...
Clemens, E. F. +5 more
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Percutaneous kyphoplasty for osteoporotic vertebral compression fractures performed in one-day surgery: safe and effective? [PDF]
Frontiers in SurgeryObjectiveEvaluating the safety and efficacy of percutaneous kyphoplasty (PKP) as an ambulatory surgery procedure, and analyzing causes of postoperative delayed discharge in day surgery settings.MethodsA retrospective analysis was conducted on 299 ...
Zhongcheng An +10 more
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Flow Characteristics and Loss Mechanism of Tip Leakage Flow in Mining Contra-Rotating Axial Flow Fan
Applied SciencesTip leakage flow interacts with the mainstream, impacting the energy transmission process within the impeller of the fan and causing a significant flow loss.
Yongping Chen +3 more
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Tip Leakage Losses in a Linear Turbine Cascade [PDF]
Journal of Turbomachinery, 1990 An investigation of tip leakage flow and its effects on loss production was performed on a large-scale linear turbine cascade having a tip gap measuring 2.1 percent of the blade height. The flow exiting the tip gap was measured to determine the losses incurred within the tip gap and the secondary kinetic energy due to tip leakage.
P. T. Dishart, J. Moore
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Influence of grooved rib tip structure on tip loss and heat transfer in a gas turbine blade
Frontiers in Energy Research, 2022 This study focuses on the effects of three groove tip structures (full rib groove tip, partial rib tip on the suction side, and partial rib tip on the pressure side) on tip leakage flow, aerodynamic characteristics of a cascade, and heat transfer in a ...
Zhiqi Kong, Tianyi Zhang, Wei Du
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Nihon Kikai Gakkai ronbunshu, 2023 Using a high-speed multistage scale model compressor simulating a middle stage of a gas turbine compressor for power generation, the effects of 3 types of rotor tip clearances on performance and operating range, and the vortex structure of rotor tip ...
Ryosuke SEKI
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Energies, 2022 Cavity width and height are two key geometric parameters of squealer tips, which could affect the control effect of squealer tips on tip leakage flow (TLF) of gas turbines.
Yufan Wang +4 more
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Applied Sciences, 2021 In modern turbine rotors, tip-leakage flow is a common phenomenon that accounts for about 1/3 of the stage loss. Studies show that as the imposed load increases, a shock wave appears in the tip region, which causes a significant interference on the ...
Zuojun Wei +4 more
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Research on the Influence of Steam Turbine Seal Leakage [PDF]
E3S Web of Conferences, 2021 CFD was employed to simulate the steam flow in 1.5-stage cascades with three different seal clearances. When the seal clearance is 0, there is no steam seal leakage, no obvious secondary flow in the cascade, and the stage efficiency reaches 88.27%.
Ping-guo Zou, Zhen-tao Zhang, Gang Li
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