Results 21 to 30 of about 117 (105)
Investigation of Complex Characteristics of Waterjet Propulsion Device with Intake Grid
Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 The intake grid is always installed technically to protect the impeller at the entrance of the waterjet propulsion device’s inlet duct affecting its performance. Therefore, this study discussed the complex features of the circular, rectangular, and streamlined intake grid.
Can Luo +7 more
wiley +1 more source
Flow behaviors in a Kaplan turbine runner with different tip clearances
Advances in Mechanical Engineering, 2021 Tip clearance between the runner blade tip and shroud in a Kaplan turbine is inevitable, and the tip leakage flow (TLF) and tip leakage vortex (TLV) induced by the tip clearance have a considerable effect on the flow behaviors.
Yue Ma +6 more
doaj +1 more source
Dynamic Analysis of Cavitation Tip Vortex of Pump-Jet Propeller Based on DES
Applied Sciences, 2020 When a pump-jet propeller rotates at high speeds, a tip vortex is usually generated in the tip clearance region. This vortex interacts with the main channel fluid flow leading to the main energy loss of the rotor system.
Jianping Yuan +6 more
doaj +1 more source
Energies, 2019 Tip leakage vortex (TLV) in a transonic compressor rotor was investigated numerically using detached-eddy simulation (DES) method at different working conditions.
Xiangyu Su +3 more
doaj +1 more source
AIP Advances, 2022 Tip clearance inevitably exists in helico-axial flow multiphase pumps, which generates a great impact on flow characteristics. To select a reasonable tip clearance and improve the transporting efficiency, different tip clearances (Rtc = 0.5, 1.0, and 1.5
Haigang Wen +3 more
doaj +1 more source
Method of Improving Stability of a Highly-Loaded Axial Compressor Stage by Coupling Different Casing Treatments [PDF]
Journal of Applied Fluid Mechanics, 2022 Casing treatment is a powerful method for improving the stability of aircraft compressors. An optimized slot-type casing treatment was tested on the first rotor of a highly-loaded two-stage compressor, and the results showed that the casing treatment ...
Y. Chen, A. Lin, H. Zhang, W. Chu
doaj +1 more source
Tip Clearance Effect on The Tip Leakage Vortex Evolution and Wake Instability of a Ducted Propeller
Journal of Marine Science and Engineering, 2022 The occurrence of a tip leakage vortex (TLV) is a special phenomenon of ducted propellers, which has a significant influence on the propeller’s hydrodynamic performance and efficiency.
Xidi Zhang +3 more
doaj +1 more source
Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 The behaviors of vortex rings for free jet and synthetic jet with various Reynolds numbers and Strouhal numbers are numerically studied by the k-ε model. The positions of the leading vortex of free jet are investigated under the three different conditions, and the effect of Strouhal number on the vortex ring is analyzed in detail. The results show that
Jianlong Chang +8 more
wiley +1 more source
Stage-dependent evolution and gas-phase effects on tip leakage vortex dynamics in a three-stage multiphase pump [PDF]
International Journal of Fluid EngineeringThe tip leakage vortex (TLV) significantly governs hydraulic losses and flow instability in multiphase pumps, yet its behavior in multistage configurations under gas–liquid two-phase conditions remains poorly understood.
Bin Xu +10 more
doaj +1 more source
Energies, 2022 The Delayed Detached Eddy Simulation (DDES) turbulence model was coupled with a homogeneous cavitation model to analyze the tip-leakage vortex (TLV) cavitating-flow characteristics in a waterjet pump.
Shujian Lv +3 more
doaj +1 more source