Influence of Shock Wave on Loss and Breakdown of Tip-Leakage Vortex in Turbine Rotor with Varying Backpressure [PDF]
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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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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Calculation of the Energy Loss for Tip Leakage Flow in Turbines
Chinese Journal of Aeronautics, 2004 AbstractA commercial N-S solver has been employed for simulation and investigation of the unsteady flow field inside the tip clearance of a turbine rotor. The main objective of this paper is to introduce a new method of energy loss calculation for the flow field in tip clearance region of a turbine rotor blade This method can be easily used in all ...
Mohsen, Hassanvand +3 more
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Contribution to tip leakage loss modeling in radial turbines based on 3D flow analysis and 1D characterization [PDF]
International Journal of Heat and Fluid Flow, 2019 [EN] The characterization of tip leakage flow plays an important role for one-dimesional loss modeling and design in radial turbine research. Tip leakage losses can be expressed as function of fluid momentum and mass flow passing through the tip gap.
JOSÉ Ramon Serrano +2 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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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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Tip-leakage flow loss reduction in a two-stage turbine using axisymmetric-casing contouring
Chinese Journal of Aeronautics, 2014 AbstractIn order to reduce the losses caused by tip-leakage flow, axisymmetric contouring is applied to the casing of a two-stage unshrouded high pressure turbine (HPT) of aero-engine in this paper. This investigation focuses on the effects of contoured axisymmetric-casing on the blade tip-leakage flow.
Zuojun Wei
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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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