Results 21 to 30 of about 1,609 (213)

Numerical investigation of tip leakage vortex cavitation

IOP Conference Series: Earth and Environmental Science, 2019
Tip leakage vortex cavitation is a concern for axial hydraulic turbines. Generally, cavitation may occur in the core of the TLV, often leading to erosion of the runner blades and the casing. The objective of this paper is to study the effects of this phenomenon on the hydrodynamics characteristics of a standard NACA0009 blade.
Ali Maghooli, Mehrdad Raisee, Seyed Ahmad Nourbakhsh   +2 more
openaire   +1 more source

Effects of Tip Clearance Size on Energy Performance and Pressure Fluctuation of a Tidal Propeller Turbine

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, Haechang Jeong, Jun-Ho Kim, Jin-Soon Park, Changjo Yang   +4 more
doaj   +1 more source

Numerical Prediction of the Aerodynamics and Acoustics of a Tip Leakage Flow Using Large-Eddy Simulation

International Journal of Turbomachinery, Propulsion and Power, 2021
A Large-Eddy Simulation of the tip leakage flow of a single airfoil is carried out. The configuration consists of a non-rotating, isolated airfoil between two horizontal plates with a gap of 10 mm between the tip of the airfoil and the lower plate.
David Lamidel, Guillaume Daviller, Michel Roger, Hélène Posson   +3 more
doaj   +1 more source

The effect of tip clearance size on pre-stall flow features of a transonic axial compressor by using throttle model

AIP Advances, 2023
This paper aims at the numerical analysis of the influence of tip clearance size on the pre-stall flow features of a transonic high-speed compressor by applying the throttle model at the exit of the compressor computational domain.
Khalid Kamal Abdelbagi
doaj   +1 more source

Research on Cavitation Wake Vortex Structures Near the Impeller Tip of a Water-Jet Pump

Energies, 2023
Cavitation can cause noise in the water-jet pump. If cavitation occurs in the water-jet pump, the hydraulic components in the pump are prone to erosion. The surface erosion reduces energy delivery efficiency and increases maintenance costs.
Yun Long, Mingyu Zhang, Zhen Zhou, Jinqing Zhong, Ce An, Yong Chen, Churui Wan, Rongsheng Zhu   +7 more
doaj   +1 more source

Leakage Flow Characteristics in Blade Tip of Shaft Tubular Pump

Journal of Marine Science and Engineering, 2023
The shaft tubular pump device is widely used in various water diversion projects because of its ultra-low head and large flow characteristics. Due to the tip clearance between the blade and the shroud, it is easy to cause hydraulic mechanical performance
Zhikang Lin, Fan Yang, Jun Guo, Hongfu Jian, Shengjie Sun, Xiaoyu Jin   +5 more
doaj   +1 more source

Control and Entropy Analysis of Tip Leakage Flow for Compressor Cascade under Different Clearance Sizes with Endwall Suction

Entropy, 2020
To investigate the influence of the change of tip clearance size on the control effect of the endwall suction, the effects of endwall suction on the aerodynamic performance of the axial compressor cascade were studied numerically.
Botao Zhang, Bo Liu, Changfu Han, Hang Zhao   +3 more
doaj   +1 more source

Experimental and Numerical Investigations for Dual−Cavity Tip Aerodynamic Performance in the Linear Turbine Cascade

Aerospace, 2023
Experimental and numerical studies of a linear high-loaded turbine cascade with a dual−cavity tip structure are presented in this paper. The experimental conditions contained an increase in the outlet Mach number from 0.42 to 0.92, a change in the ...
Yingjie Chen, Le Cai, Dengyu Jiang, Yiyi Li, Songtao Wang   +4 more
doaj   +1 more source

Influences of tip leakage flows on flow field at design condition in transonic centrifugal compressor with splitter blade

Nihon Kikai Gakkai ronbunshu, 2016
A tip leakage flow is well known to have predominant influence on a loss generation in a compressor. An impeller for a transonic centrifugal compressor is generally composed of the main and the splitter blades to gain the choke flow rate.
Masanao KANEKO, Hoshio TSUJITA
doaj   +1 more source

Interference Effect of Shock Wave on Tip Leakage Vortex in a Transonic Variable Nozzle Turbine

International Journal of Turbomachinery, Propulsion and Power
The tip leakage flow at both sides of the nozzle vane is an important factor for the reduction in turbine aerothermal performance. A strong shock wave is generated at the trailing edge of the nozzle vane under transonic condition, which can interfere ...
Xinguo Lei, Qin Luo, Hanzhi Zhang
doaj   +1 more source