Results 31 to 40 of about 742,255 (143)
Vortex suppression of the tip leakage flow over a NACA0009 hydrofoil via a passive jet induced by the double-control-hole [PDF]
, 2021 Tip leakage vortex (TLV) frequently occurring in bladed energy conversion machines may induce flow loss as well as cavitation. The double-curved-hole (DC hole) structures located at the 10%–25% chord near the leading edge of the foil are adopted to ...
Zhang, Guangjian +5 more
core +2 more sources
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
Mind the gap ::a new insight into the tip leakage vortex using stereo-PIV [PDF]
, 2022 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 +3 more
core +3 more sources
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
Numerical investigation of tip leakage vortex [PDF]
, 2017 The Kaplan turbine has a small clearance gap between the blade tip and casing to allow the blades to rotate freely. This clearance gap is the cause of an undesirable Tip Leakage Vortex (TLV).
Fredriksen, Vegard
core +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
Shock and Vibration, Volume 2020, Issue 1, 2020., 2020 In order to investigate the effect of various impeller tip clearances on the pressure pulsation in a mixed‐flow pump, the energy performance test and pressure pulsation experiment of a mixed‐flow pump with different tip clearances are studied simultaneously.
Leilei Ji +5 more
wiley +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
Spectral proper orthogonal decomposition of compressor tip leakage flow [PDF]
, 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.
Mehdi Vahdati +7 more
core +1 more source
Numerical analysis of vortex and cavitation dynamics of an axial-flow pump
Engineering Applications of Computational Fluid Mechanics, 2022 This study focuses on the correlative mechanism of the ambient pressure and inflow uniformity on the vortex and cavitation dynamics of an axial flow pump. The shear stress transport k – ω turbulence model and Schnerr–Sauer cavitation model are applied in
Jie Gong +3 more
doaj +1 more source