Results 11 to 20 of about 23,531 (251)
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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Prediction of Tip-Leakage Losses in Axial Turbines [PDF]
Journal of Turbomachinery, 1990 Existing methods for predicting the tip-leakage losses in turbomachinery are based on a variety of assumptions, many of which have not been fully verified experimentally. Recently, several detailed experimental studies in turbine cascades have helped to clarify the physics of the flow and provide data on the evolution of the losses.
M. I. Yaras, S. A. Sjolander
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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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A novel approach for suppressing leakage flow through turbine blade tip gaps
Propulsion and Power Research, 2022 Tip clearance leakage flow of the turbine bade is an important factor limiting the augment of the high pressure turbine efficiency, which should be suppressed utilizing certain methods.
Tianyi Wang, Yimin Xuan
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Effects of Loading Level on the Variation of Flow Losses in Subsonic Axial Compressors
Energies, 2022 The development of the aircraft industry seeks an increase in compressor loading, bringing unique flow phenomena and design problems; thus, insights into the ultrahigh loaded compressor are in great need.
Ruoyu Wang +3 more
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Effect of Film Position on the Flow and Heat Transfer Characteristics of Full-Ribbed Rotor Tip
Frontiers in Energy Research, 2022 This article numerically studied the flow and heat transfer characteristics of the full-ribbed fluted tip of a rotor with four types of distribution of cooling films, namely, the mid-arc uniform film at the bottom of the groove, the uniform film on full ...
Haimeng Zhou +4 more
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Effect of pressurization on tip leakage losses in micro-scale centrifugal compressors
European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, 2021 Turbomachinery miniaturization has been an emerging research field during the last decades and, especially, micro-scale radial compressors are becoming increasingly relevant due to the development of high-speed electric motors. They can be found in a wide range of applications such as micro gas turbines, aerial unmanned vehicles propulsion, fuel cells ...
Sebastián Herrera, Andrés +2 more
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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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Investigation of the tip-leakage losses in turbine axial stages
Journal of Physics: Conference Series, 2014 In turbomachinery, an influence of a tip-leakage flow on overall blade loss is crucial and its reduction is still worth striving for. In this paper a numerical analysis of the flow in tip seal of high-rotating gas turbine engine has been made. This analysis is a part of experimental research for testing the commercially used different tip seals ...
Szymański, Artur +3 more
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International Journal of Rotating Machinery, 2011 The aerodynamic losses in gas turbines are mainly caused by profile loss secondary flow, and tip leakage loss. This study focuses on tip leakage flow of high-pressure turbine stages.
Hesham M. El-Batsh, Magdy Bassily Hanna
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