Results 271 to 280 of about 1,041,715 (351)

Study on the blade squealer tip affecting tip leakage flow and performance of a multiphase pump

The Physics of Fluids, 2023
To improve the adverse effects of tip leakage flow on the multiphase pump, a method to design a squealer tip on the impeller blade was proposed in this paper.
Wanqi Tang, G. Shi, Yexiang Xiao, Zongliu Huang, Wei Li, Wenxiu Chen   +5 more
semanticscholar   +1 more source

Application and Comparison of Dynamic Mode Decomposition Methods in the Tip Leakage Cavitation of a Hydrofoil Case

The Physics of Fluids, 2023
The cavitation of tip leakage vortex (TLV) induced by tip leakage has always been a difficult problem faced by turbomachinery, its flow structure is complex and diverse. How to accurately extract the main structures that affect the cavitating flow of the
Yanzhao Wu, R. Tao, Z. Yao, R. Xiao, Fujun Wang   +4 more
semanticscholar   +1 more source

Tip Leakage Flow Structures And Its Influence On Cavitation Inception for a NACA0009 Hydrofoil

Journal of Fluids Engineering, 2023
Cavitation inception in tip leakage flows remains a challenging topic in the engineering field, as the effect of tip gap width on inception is unclear.
Xianren Feng, Yunqiao Liu, Benlong Wang
semanticscholar   +1 more source

Control strategies for tip leakage vortex using inclined squealer rim in axial turbines

The Physics of Fluids, 2022
In a typical gas turbine, due to its complicated blade geometry, complex vortex structures appear and cause significant aerodynamic loss. Vortex systems dominated by a tip leakage vortex near the tip region are the primary source of this loss.
Yufan Wang, Weihao Zhang, Dongming Huang, Shoumin Jiang, Yun Chen, Guangjian Ma   +5 more
semanticscholar   +1 more source

Tip leakage reduction through tip injection in turbomachines

22nd Joint Propulsion Conference, 1986
This paper descr ibes an experimental s tudy on t i p leakage flow reduct ion through t i p i n j e c t i o n . A s i n g l e blade was placed i n the test s e c t i o n of a wind-tunnel wi th a gap between the t i p of t h e blade and t h e top w a l l .
M. POUAGARE, W. WEINHOLD
openaire   +1 more source

Vortex and cavity dynamics for the tip-leakage cavitation over a hydrofoil

The Physics of Fluids, 2022
Large eddy simulations (LES) were used to investigate unsteady tip-leakage cavitating flow over a NACA (National Advisory Committee for Aeronautics) 0009 hydrofoil. The proper orthogonal decomposition (POD) was combined with fast Fourier transforms (FFT)
Zhaohui Qian, Zhe Wang, Chen Geng, Xianwu Luo   +3 more
semanticscholar   +1 more source

Enstrophy dissipation of the tip leakage vortex in a multiphase pump

The Physics of Fluids, 2022
Tip clearance is the distance required between the blade tip and the pump body wall of the impeller in the multiphase pump, of which the resulting tip leakage vortex (TLV) causes unstable flow, leading to energy dissipation.
Zekui Shu, G. Shi, Yue Dan, Binxin Wang, Xiao Tan   +4 more
semanticscholar   +1 more source

The influence of nucleation on cavitation inception in tip-leakage flows

The Physics of Fluids, 2022
Cavitation in tip leakage flow using a stationary hydrofoil analogy is investigated experimentally in a cavitation tunnel. The experiments were performed for different tip clearances (τ =gap height/maximum profile thickness) and hydrofoil incidences (α).
P. Russell, L. Barbaca, J. Venning, B. Pearce, P. Brandner   +4 more
semanticscholar   +1 more source

Interaction mechanism between the tip leakage flow and inlet boundary layer in a highly loaded compressor cascade based on scale-adaptive simulation

The Physics of Fluids, 2022
Based on the scale-adaptive simulation, the interaction mechanism between the tip leakage flow (TLF) and inlet boundary layer (IBL) and its effects on the tip flow field and aerodynamic performance of the compressor cascade was investigated.
Botao Zhang, Bo Liu, X. Mao, Hejian Wang, Zonghao Yang, Zhanyang Li   +5 more
semanticscholar   +1 more source

Tip Leakage in a Centrifugal Impeller

Journal of Turbomachinery, 1989
The effects of tip leakage have been studied using a 1-m-dia shrouded impeller where a leakage gap is left between the inside of the shroud and the impeller blades. A comparison is made with results for the same impeller where the leakage gap is closed. The static pressure distribution is found to be almost unaltered by the tip leakage, but significant
T. Z. Farge, M. W. Johnson, T. M. A. Maksoud   +2 more
openaire   +1 more source