Results 1 to 10 of about 742,255 (143)

Analysis of the Formation Mechanism of Secondary Tip Leakage Vortex (S-TLV) in an Axial Flow Pump [PDF]

Machines, 2022
Studies on the tip leakage vortex (TLV) are extensive, while studies on the secondary tip leakage vortex (S-TLV) are rare. To advance the understanding of the formation mechanism of the S-TLV, turbulent cavitating flows were numerically investigated ...
Hu Zhang, Jianbo Zang, Desheng Zhang, Weidong Shi, Jiean Shen   +4 more
doaj   +5 more sources

Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification Method

Applied Sciences, 2022
Semi-open centrifugal pumps are widely used in various fields. However, the tip leakage vortex (TLV) has a malign effect on the impeller flow field.
Bing Qian, Yinhui Cai, Qiang Ding, Daoli Zhao, Weipeng Sun, Like Wang   +5 more
doaj   +4 more sources

Dynamic characteristics of the tip leakage vortex in an oil–gas multiphase pump based on vorticity decomposition theory

Energy Science & Engineering
The paper combines experimental and numerical simulation methods to investigate the tip leakage vortex (TLV) in an oil–gas multiphase pump. The study aims to understand the evolution and dynamic characteristics of the TLV.
Guangtai Shi, Guodong Sun, Qingfang Wang, Hui Quan, Zongliu Huang, Haigang Wen, Zhengkai Hao   +6 more
doaj   +3 more sources

Influence factors and prediction model of enstrophy dissipation from the tip leakage vortex in a multiphase pump [PDF]

Scientific Reports, 2022
In a multiphase pump, tip clearance is the required distance between the blade tip and the pump body wall of the impeller, forming tip leakage vortex (TLV), causing unstable flow and energy dissipation.
Zekui Shu, Guangtai Shi, Xin Yao, Guodong Sun, Sijia Tao   +4 more
doaj   +2 more sources

Engineering Application of an Identification Method to Shock-Induced Vortex Stability in the Transonic Axial Fan Rotor

International Journal of Aerospace Engineering, 2021
In the present paper, the steady RANS (Reynolds-Averaged Navier-Stokes) simulations based on our independently developed CFD (Computational Fluid Dynamics) solver NUAA-Turbo 2.0, are carried out to investigate the shock wave/tip leakage vortex (SW/TLV ...
Yan Xue, Ning Ge
doaj   +2 more sources

Large-Eddy Simulation of Cavitating Tip Leakage Vortex Structures and Dynamics around a NACA0009 Hydrofoil [PDF]

Journal of Marine Science and Engineering, 2021
The tip leakage vortex (TLV) has aroused great concern for turbomachine performance, stability and noise generation as well as cavitation erosion. To better understand structures and dynamics of the TLV, large-eddy simulation (LES) is coupled with a ...
Linlin Geng, Desheng Zhang, Jian Chen, Xavier Escaler   +3 more
doaj   +3 more sources

Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor [PDF]

Science Progress, 2020
Casing pressure measurements and Stereoscopic Particle-Image Velocimetry (SPIV) measurements are used together to characterize the behavior of the rotor tip leakage flow at both the design and near-stall conditions in a low-speed multistage axial ...
Jun Li, Jun Hu, Chenkai Zhang
doaj   +2 more sources

A New Unsteady Flow Control Technology of Centrifugal Compressor Based on Negative Circulation Concept

International Journal of Aerospace Engineering, 2023
The tip leakage vortex (TLV) induced by the tip clearance flow has a significant impact on the performance of centrifugal compressors, causing impeller flow losses and reducing the stall margin.
Shuli Hong, Yuxuan Yang, Weiyu Lu, Xin Xiang   +3 more
doaj   +2 more sources

Numerical investigation on the influence of nonuniform tip clearance on rotor tip-clearance flow field structure [PDF]

Heliyon
A numerical study was conducted on an axial compressor, the NASA Stage 35, with three nonuniform tip clearances to understand the effect of a different shape tip clearances rotor on the compressor's performance. The results demonstrated that by modifying
Guochen Zhang, Zhipeng Li, Zhiyuan Cao, Zhihui Xu, Weihang Liu   +4 more
doaj   +2 more sources

Numerical Analysis of the Effect of Cavitation on the Tip Leakage Vortex in an Axial-Flow Pump

Journal of Marine Science and Engineering, 2021
To understand the effect of cavitation on the tip leakage vortex (TLV), turbulent cavitating flows were numerically investigated using the shear-stress transport (SST) k–ω turbulence model and the Zwart–Gerber–Belamri cavitation model.
Hu Zhang, Jun Wang, Desheng Zhang, Weidong Shi, Jianbo Zang   +4 more
doaj   +3 more sources