Stress Analysis of Wind Turbine Tower Flange Using Fluid-Structure Interaction Method

Wind power is a clean energy source that we can rely on for long term use. A wind turbine creates reliable, cost effective pollution free energy. A Horizontal axis wind turbine (HAWT) with three blades having aerofoil profile NACA 2421 is modelled in CAD software and the performance of the turbine is investigated numerically using 3D CFD Ansys 18.1 software at rotor speeds varying from 1 to 7.5 Rad/sec at wind speeds ranging from 8 to 24 m/s. In order to ensure the turbine blades do not fail due to pressure loads and rotational forces, Fluid structure interaction is carried out by importing the surface pressure loads from CFD output on to static structural module, the rotational velocities are also imparted on the blades and FE analysis is carried out to estimate the equivalent von-Mises stress for structural steel as well as aluminium alloy. It is found that aluminium alloy blades are preferable than the structural steel blades. At high rotor speeds, stresses in the structural steel exceeding the yield strength limit. For aluminium alloy the stresses are below the yield strength limit.

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Simulations of Fluid-Structure Interaction of a Wind Turbine

Fluid-Structure-Sound Interactions and Control - Lecture Notes in Mechanical Engineering ◽

10.1007/978-3-662-48868-3_65 ◽

2015 ◽

pp. 407-413

Author(s):

S. Zheng ◽

L. P. Chua ◽

Y. Zhao

Keyword(s):

Wind Turbine ◽

Fluid Structure Interaction ◽

Fluid Structure ◽

Structure Interaction

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Design of a 2MW Blade for Wind Turbine and Uni-Directional Fluid Structure Interaction Simulation

Transactions of the Korean Society of Mechanical Engineers B ◽

10.3795/ksme-b.2009.33.12.1007 ◽

2009 ◽

Vol 33 (12) ◽

pp. 1007-1013 ◽

Cited By ~ 2

Author(s):

Bum-Suk Kim ◽

Kang-Su Lee ◽

Mann-Eung Kim

Keyword(s):

Wind Turbine ◽

Fluid Structure Interaction ◽

Fluid Structure ◽

Structure Interaction ◽

Interaction Simulation

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Fluid–structure interaction analysis of fluid pressure pulsation and structural vibration features in a vertical axial pump

Advances in Mechanical Engineering ◽

10.1177/1687814019828585 ◽

2019 ◽

Vol 11 (3) ◽

pp. 168781401982858

Author(s):

Liaojun Zhang ◽

Shuo Wang ◽

Guojiang Yin ◽

Chaonian Guan

Keyword(s):

Pressure Pulsation ◽

Interaction Analysis ◽

Equivalent Stress ◽

Fluid Structure Interaction ◽

Fluid Pressure ◽

Structural Vibration ◽

Interaction Method ◽

Fluid Structure ◽

Structure Interaction ◽

Axial Pump

Current studies on the operation of the axial pump mainly focus on hydraulic performances, while the coupled interaction between the fluid and structure attracts little attention. This study aims to provide numerical investigation into the vibration features in a vertical axial pump based on two-way iterative fluid–structure interaction method. Three-dimensional coupling model was established with high-quality structured grids of ADINA software. Turbulent flow features were studied under design condition, using shear–stress transport k-ω turbulence model and sliding mesh approach. Typical measure points along and perpendicular to flow direction in fluid domain were selected to analyze pressure pulsation features of the impeller and fixed guide vane. By contrast, vibration features of equivalent stress in corresponding structural positions were investigated and compared based on fluid–structure interaction method. In order to explore fluid–structure interaction vibration mechanism, distribution of main frequencies and amplitudes of the measure points was presented based on the Fast Fourier Transformation method. The results reveal the time and frequency law of fluid pressure pulsation and structural vibration at the same position in the vertical axial pump while additionally provide important theoretical guidance for optimization design and safe operation of the vertical axial pump.

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