Cantilever beam is a simplified sample of a lot of mechanical components used in a wide range of applications, including many industries such as gas turbine blade. Due to the nature of the operating conditions, beams are subject to variety of damages especially crack propagates. Crack propagation may lead to catastrophic failure during operation. Therefore, online detection of crack presence an...

The finite element method is adopted to establish the dynamical models of blade, bladed disk and blades-diskshaft assemblies. Based on the analysis of mistuned structure and the dynamic characteristics of model in different levels, it gives the vibration mode distribution of different models. The research shows that the characteristics of the bladed disk and shaft have a huge difference, where ...

Coupled dynamic analysis of a floating offshore wind turbine (FOWT) is predicted with in-house ITU-WAVE computational tool. The hydrodynamic parameters are approximated time marching boundary integral equation whilst aerodynamic solved unsteady blade element momentum method. In addition, forces on FOWT due to mooring lines quasi-static viscous effects included Morison equation. FOWT’s blades co...

Small horizontal axis wind turbines operating at low speeds face the issue of performance compared to large turbines. A high amount torque is required start producing power speed overtake friction mechanical parts. design tip-speed ratio (?) suitable for applications. The relevance classical blade-element/ momentum theory, traditionally used ratio, controversial ratio. This paper presents a new...

This study investigated the performance and aeroelastic characteristics of a wind turbine blade based on strongly coupled approach (two-way fluid structure interaction) to simulate the transient FSI1 responses of HAWT2. Aerodynamic response was obtained by 3D CFD-URANS approach and structural response was obtained by 3D Finite element method. Aeroelastic responses of the blade were obtained by ...

Certain results of numerical simulations obtained by the use of the spectral finite element method in time domain are presented by the authors. They were selected in order to show the effectiveness of the spectral finite element method for investigation of problems associated with propagation of guided elastic waves in a wind turbine laminated composite blade. Results of these simulations were ...

The important step in the turbine aerodynamic design is generation of blade element profiles to achieve the required flow deflection and smooth flow acceleration with minimum losses. During profile generation, in addition to aerodynamic performance, additional constraints of thermal, structural and castability requirements need to be considered. Thus profile generation is a trade-off between co...

Propellers for electric aviation are used in solo- and multirotor applications. Multifidelity analysis with reduced cycle time is crucial to explore several designs energy minimization range maximization. A low-fidelity design tool, py_BEM, developed of a reverse-engineered solo 2-bladed propeller using blade-element momentum theory physics enhancements including local Reynolds number effect, b...

The hydrokinetic turbine is used worldwide for electrical generation purposes, as such a technology may strongly reduce environmental impact. Turbines designed using backward swept blades can significantly the axial load, being relevant hydro turbines. However, few works have been conducted in literature this regard. For case of rotors, are still challenge, authors unaware any optimization proc...