Results 91 to 100 of about 742,255 (143)

Mind the gap: a new insight into the tip leakage vortex using stereo-PIV [PDF]

, 2019
The tip leakage vortex (TLV), which develops in the clearance between the rotor and the stator of axial hydro turbines, has been studied for decades. Yet, many associated phenomena are still not understood.
Dreyer, Matthieu, Münch-Alligné, Cécile, Decaix, Jean, Farhat, Mohamed   +3 more
core  

Analysis of hydrofoil tip leakage vortex dynamic characteristics

The clearance exists inevitably between the turbine guide vanes and the fixed wall, and the resulting tip leakage vortex leads to the increase of hydraulic loss.
Xiaobing Liu, Ziyao Zhou, Jiayang Pang, Liang Peng, Jialing Li, Yuanyuan Gang, Demin Liu   +6 more
core   +1 more source

A Comparative Numerical Study of Hydrodynamic and Acoustic Performance Between Contracted and Loaded Tip Pump-Jet and Conventional Pump-Jet

Journal of Marine Science and Engineering
This study employs a Contracted and Loaded Tip (CLT) propeller to replace the conventional pump-jet rotor, and a comparative analysis is conducted using the Detached Eddy Simulation (DES) method. The reliability of the numerical method is first validated
Yu Zhao, Chao Wang, Cong Sun, Yi-Ming Hu, Hao-Yu Liu, Min Liu   +5 more
doaj   +1 more source

A Computationally Efficient Hybrid Leakage Model for Modeling Leakage in Positive Displacement Compressors [PDF]

, 2012
An empirical frictional correction factor to the isentropic nozzle model has been developed for application to leakage modeling in scroll, rotary and other similar compressors. This correction factor is derived by calculating the leakage mass flow with a
Groll, Eckhard A., Braun, James E., Horton, W. Travis, Bell, Ian H.   +3 more
core   +1 more source

Effect of valve opening on starting performance of pump as turbine. [PDF]

PLoS One, 2023
Zhang YL, Li JF, Zheng YQ.
europepmc   +1 more source

Image-Based Multi-Domain Feature Extraction for IoUT-Oriented Monitoring of Hydrofoil Tip Leakage Flow Cavitation

IoT
For Internet of Underwater Things (IoUT)−oriented condition monitoring of underwater propulsion systems, continuous visual observations can provide rich information on the spatial distribution and temporal evolution of cavitation, while the direct ...
Zijia Hu, Qichao Wang, Yadong Huang, Yanliang Ji   +3 more
doaj   +1 more source

Modeling of Unsteady Blade Sheet and Developed Tip Vortex Cavitation [PDF]

, 2001
A boundary element method is used for the numerical modeling of unsteady blade sheet and developed tip vortex cavitation on propellers. The objective of this work is to predict more accurately blade sheet and developed tip vortex cavity in the vicinity ...
Kinnas, Spyros A., Lee, Hanseong
core  

Large-eddy Simulation of Cavitating Tip Leakage Vortex [Elektronisk resurs]

, 2022
Tip Leakage Vortices (TLV) are very common in axial turbomachines. This type of vortex forms as the result of an interaction between the leakage flow, a flow from the pressure side of a blade to its suction side, and the upstream flow.
Nilsson, Håkan,, Arabnejad Khanouki, Mohammad Hossein,, Bensow, Rickard,   +2 more
core  

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

Entropy (Basel), 2020
Zhang B, Liu B, Han C, Zhao H.
europepmc   +1 more source

Large eddy simulation of the tip-leakage cavitating flow with an insight on how cavitation influences vorticity and turbulence

Cavitation within a tip leakage flow remains a challenging issue in a variety of axial hydraulic machines. It is still not possible nowadays to predict cavitation occurrence in such a flow with acceptable accuracy.
Long, X. P., Peng, X. X., Farhat, M., Cheng, H. Y., Bai, X. R., Ji, B.   +5 more
core   +1 more source