Results 21 to 30 of about 742,255 (143)
Aerospace, 2023 In an axial-flow turbine of a jet engine used for aircraft propulsion, the passage vortex (PV) and tip leakage vortex (TLV) generated inside the blade passage deteriorate the aerodynamic performance.
Takayuki Matsunuma, Takehiko Segawa
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Effects of the Shock Wave Structure on the Tip Clearance Leakage Flow in Transonic Compressor Rotors
International Journal of Aerospace Engineering, Volume 2023, Issue 1, 2023., 2023 The interaction between shock waves and the tip clearance flow in a transonic compressor rotor has important effects on the tip clearance flow and the rotor aerodynamic performance. In this paper, two transonic rotors with a high pressure ratio are selected to study the tip flow, one of which has one normal shock wave at the blade tip and the other has
Xinlong Ye, Zhenggui Zhou, Dakun Sun
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Energies, 2020 Unavoidable tip clearance between blade tip and casing shroud plays an important role in the performance and characteristics of a tidal propeller turbine.
Bao Ngoc Tran +4 more
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Research on Cavitation Flow Dynamics and Entropy Generation Analysis in an Axial Flow Pump
Journal of Sensors, Volume 2022, Issue 1, 2022., 2022 The entropy generation theory is introduced to investigate the effects of different NPSH and tip clearance size on the cavitation flow dynamics and mechanical energy dissipation intuitively and quantitatively within an axial flow pump through numerical simulations. The results indicate that main mechanical energy dissipation of the pump gathers in part
Simin Shen +5 more
wiley +1 more source
Journal of Marine Science and Engineering, 2022 In this paper, the gas-liquid flow is comprehensively analyzed under different inlet gas void fractions, and the effect of tip leakage vortex (TLV) on the gas flow pattern in multiphase pumps is revealed.
Yexiang Xiao +5 more
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Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 The submerged high‐pressure water jet has the characteristics of high velocity, strong turbulence, and severe cavitation. In order to reveal the formation mechanism of shear cavitation in the submerged high‐pressure water jet and to grasp the turbulent structure and velocity distribution characteristics in the jet, the prediction ability of different ...
Yongfei Yang +6 more
wiley +1 more source
Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake Grid
Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 The intake grid is always installed technically to protect the impeller at the entrance of the waterjet propulsion device’s inlet duct affecting its performance. Therefore, this study discussed the complex features of the circular, rectangular, and streamlined intake grid.
Can Luo +7 more
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Dynamic Analysis of Cavitation Tip Vortex of Pump-Jet Propeller Based on DES
Applied Sciences, 2020 When a pump-jet propeller rotates at high speeds, a tip vortex is usually generated in the tip clearance region. This vortex interacts with the main channel fluid flow leading to the main energy loss of the rotor system.
Jianping Yuan +6 more
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Flow behaviors in a Kaplan turbine runner with different tip clearances
Advances in Mechanical Engineering, 2021 Tip clearance between the runner blade tip and shroud in a Kaplan turbine is inevitable, and the tip leakage flow (TLF) and tip leakage vortex (TLV) induced by the tip clearance have a considerable effect on the flow behaviors.
Yue Ma +6 more
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AIP Advances, 2022 Tip clearance inevitably exists in helico-axial flow multiphase pumps, which generates a great impact on flow characteristics. To select a reasonable tip clearance and improve the transporting efficiency, different tip clearances (Rtc = 0.5, 1.0, and 1.5
Haigang Wen +3 more
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