Results 11 to 20 of about 24,273 (294)

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   +2 more sources

Wavelet Analysis of a Blade Tip-Leakage Flow [PDF]

AIAA Journal, 2018
The secondary flow generated by the clearance between an isolated airfoil tip and an end-plate is analyzed by means of a zonal large-eddy simulation, in comparison with available experimental data. The flow around the tip clearance is described with full large-eddy simulation, while Reynolds-averaged Navier-Stokes is employed in the rest of the ...
Boudet, Jérôme, Jacob, Marc C., Caro, Joëlle, Jondeau, Emmanuel, Li, Bo   +4 more
openaire   +5 more sources

Spectral proper orthogonal decomposition of compressor tip leakage flow [PDF]

Physics of Fluids, 2021
To identify the spatiotemporal coherent structure of compressor tip leakage flow, spectral proper orthogonal decomposition (SPOD) is performed on the near-tip flow field and the blade surface pressure of a low-speed compressor rotor. The data used for the SPOD analysis are obtained by delayed-detached eddy simulation, which is validated against the ...
Xiao He, Zhou Fang, Georgios Rigas, Mehdi Vahdati   +3 more
openaire   +4 more sources

Flow Characteristics and Loss Mechanism of Tip Leakage Flow in Mining Contra-Rotating Axial Flow Fan

Applied Sciences
Tip leakage flow interacts with the mainstream, impacting the energy transmission process within the impeller of the fan and causing a significant flow loss.
Yongping Chen, Ronghua Liu, Wenqing Peng, Shiqiang Chen   +3 more
doaj   +2 more sources

Control of Tip Leakage Flow in Axial Flow Compressor Cascade by Suction on the Blade Tip

Journal of Applied Fluid Mechanics, 2018
One of the important ways of improving axial compressor performance is to control the tip leakage flow near the endwall region. Numerical computations were conducted to investigate the impact of blade tip suction on the axial compressor cascade performance in current paper.
X. Mao, B. Liu, T. Tang
openaire   +4 more sources

Tip-leakage-flow excited unsteadiness and associated control [PDF]

Physics of Fluids
Tip leakage flow in turbomachinery inherently generates intense unsteady features, named self-excited unsteadiness, which significantly affects the operating stability, aerodynamic efficiency, and noise but has not been well understood. A zonalized large eddy simulation is employed for a linear cascade, with wall-modeled large eddy simulation active ...
Yabin Liu, Zhong-Nan Wang, Lei Tan, Paul Gary Tucker, Felix M. Möller   +4 more
openaire   +3 more sources

Oscillatory Tip Leakage Flows and Stability Enhancement in Axial Compressors

International Journal of Rotating Machinery, 2018
Rotating stall axial compressor is a difficult research field full of controversy. Over the recent decades, the unsteady tip leakage flows had been discovered and confirmed by several research groups independently.
Feng Lin, Jingyi Chen
doaj   +2 more sources

Effects of tip-gap size on the tip-leakage flow in a turbomachinery cascade [PDF]

Physics of Fluids, 2006
The effects of tip-gap size on the tip-leakage vortical structures and velocity and pressure fields are investigated using large-eddy simulation, with the objective of providing guidelines for controlling tip-leakage cavitation and viscous losses associated with the tip-leakage flow.
You, D, Wang, M, Moin, P, Mittal, R
openaire   +3 more sources

Axial compressor blades tip leakage flow control using natural aspiration. [PDF]

Sci Rep, 2023
Blades tip leakage flow structure in axial compressors has dominant effects on flow stability and losses. Accordingly, in the present study, three different ideas are introduced for alleviation of undesirable effects of the blades tip leakage flow. These
Nejad PG, Zenouz RT.
europepmc   +2 more sources

Analysis of hydrofoil tip leakage vortex dynamic characteristics

Advances in Mechanical Engineering
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.
Yuanyuan Gang, Ziyao Zhou, Jialing Li, Liang Peng, Demin Liu, Xiaobing Liu, Jiayang Pang   +6 more
doaj   +2 more sources