Browsing by Author "Wang, Zhengwei"
Now showing items 1-15 of 15
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A review of pzt patches applications in submerged systems
(Multidisciplinary Digital Publishing Institute (MDPI), 2018-07-12)
Article
Open AccessSubmerged systems are found in many engineering, biological, and medicinal applications. For such systems, due to the particular environmental conditions and working medium, the research on the mechanical and structural ... -
Cavitation effects on the structural resonance of hydraulic turbines: Failure analysis in a real francis turbine runner
(2018-09-03)
Article
Open AccessWhen discussing potential resonances in hydraulic turbine runners, cavitation effects are usually neglected. Nevertheless, recent studies have experimentally proved, that large cavitation volumes in the proximity of flexible ... -
Crack growth analysis and fatigue life estimation in the piston rod of a Kaplan hydro turbine
(2018-11)
Article
Open AccessLinear elastic fracture mechanics (LEFM) approaches are seldom used to analyze fatigue problems in hydraulic turbomachinery, where extremely simplified fatigue models are normally considered. In one of the largest Kaplan ... -
Detection of erosive cavitation on hydraulic turbines through demodulation analysis
(Institute of Physics (IOP), 2018)
Conference report
Open AccessErosive cavitation in hydraulic turbines affects severely the runner structure, increasing maintenance costs and reducing the remaining useful life of the component. Actual vibro-acoustic techniques used to detect this ... -
Failure investigation of a Francis turbine under the cavitation conditions
(2016)
Conference report
Open AccessAcoustic-Structural coupling methodology has been used to numerically investigate the failure of a Francis turbine runner that broke down within one day of operation. The goal of the work has been to determine the feasibility ... -
Fatigue life estimation of Francis turbines based on experimental strain measurements: Review of the actual data and future trends
(2019-03)
Article
Open AccessDue to the massive entrance of new renewable energies such as wind or solar, hydraulic turbines have to work far from its designed point and withstanding multiple transients, such as starts and stops, that shorten the ... -
Numerical analysis of the influence of design parameters on the efficiency of an OWC axial impulse turbine for wave energy conversion
(2019-03-12)
Article
Open AccessOscillating water column (OWC) axial impulse turbines permit the conversion of wave energy into electrical power. Unlike other hydropower units with a mature and well established technology, such turbines have been recently ... -
Numerical analysis on the modal characteristics of a pumped storage unit runner in cavitating flow
(Elsevier, 2022-12-01)
Article
Restricted access - publisher's policyCavitation is an important issue in pumped storage unit as it can compromise the safe and stable operation of the unit. The present work aims revealing the dynamic behavior of a pump-turbine runner in cavitating flow from ... -
Numerical evaluation of cavitation void ratio significance on hydrofoil dynamic response
(Institute of Physics (IOP), 2015)
Conference report
Open AccessThe added mass effects on a NACA0009 hydrofoil under cavitation conditions determined in a cavitation tunnel have been numerically simulated using finite element method (FEM). Based on the validated model, the effects of ... -
Numerical investigation into the influence on hydrofoil vibrations of water tunnel test section acoustic modes
(2019-06-17)
Article
Restricted access - publisher's policyHigh-speed water tunnels are typically used to investigate the single-phase and two-phase flows around hydrofoils for hydraulic machinery applications but their dynamic behavior is not usually evaluated. The modal analysis ... -
Numerical investigation of the cavitation effect on natural frequencies of a hydrofoil
(2016)
Conference report
Open AccessThe added mass effects on a NACA0009 hydrofoil under cavitation conditions determined in a cavitation tunnel have been numerically simulated using finite element method (FEM). Based on the validated model, the effects of ... -
Numerical simulation of added mass effects on a hydrofoil in cavitating flow using acoustic FSI
(2016-11-14)
Article
Restricted access - publisher's policyA fluid-structure interaction system has been solved using the coupled acoustic structural finite element method to simplify the cavitating flow conditions around a hydrofoil. The modes of vibration and the added mass ... -
Operating conditions leading to crack propagation in turbine blades of tidal barrages. Influence of head and operating mode
(Elsevier, 2020-01)
Article
Open AccessTidal energy systems and specifically tidal barrages are renewable energy systems, that use the potential energy of tides to produce electricity. Actually, there are few tidal power stations operating, although recent ... -
Shutdown idling performance of the nuclear main coolant pump under station blackout accident: An optimization study
(SAGE publishing, 2022-05-25)
Article
Restricted access - publisher's policyLead-cooled fast reactor (LFR) is an important reactor type of the Generation IV nuclear energy, and the main coolant pump (MCP) is the only and most critical power equipment in primary circuit of LFR. The shutdown idling ... -
Visualization research of energy dissipation in a pump turbine unit during turbine mode's starting up
(Elsevier, 2023-11-01)
Article
Restricted access - confidentiality agreementIdentifying the precise location of flow energy dissipation (FED) in pump turbines is crucial for enhancing the stability of pumped storage power stations. In this study, the transient process of the turbine mode's starting ...
