Closed Die Forging of Turbine Blades

2010 ◽  
Author(s):  
Somer M. Nacy ◽  
Alaa H. Ali
Keyword(s):  
Experimental Investigation ◽  
Finite Element ◽  
Turbine Blade ◽  
High Purity ◽  
Turbine Blades ◽  
Theoretical Part ◽  
Die Forging ◽  
Closed Die Forging ◽  
Finite Element Package ◽  
Line Angle

This paper comprises a theoretical and experimental investigation dealing with the simulation of closed die forging of turbine blades. The theoretical part was achieved numerically via the well known finite element package (ANSYS). For simulation purposes, the material used for blade manufacture was high purity lead (99.99%), which was pressed between two dies with the required shape of the turbine blade. An optimum flash-less die shape was obtained with a parting line angle of 16°.

Strength Evaluation and Failure Prediction of a Composite Wind Turbine Blade Using Finite Element Analysis

2010 ◽  
Author(s):  
Prenil Poulose ◽  
Zhong Hu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Turbine Blades ◽  
Failure Prediction ◽  
Element Model ◽  
Wind Turbine Blade ◽  
Element Analysis ◽  
Strength Evaluation

Strength evaluation and failure prediction on a modern composite wind turbine blade have been conducted using finite element analysis. A 3-dimensional finite element model has been developed. Stresses and deflections in the blade under extreme storm conditions have been investigated for different materials. The conventional wood design turbine blade has been compared with the advanced E-glass fiber and Carbon epoxy composite blades. Strength has been analyzed and compared for blades with different laminated layer stacking sequences and fiber orientations for a composite material. Safety design and failure prediction have been conducted based on the different failure criteria. The simulation error estimation has been evaluated. Simulation results have shown that finite element analysis is crucial for designing and optimizing composite wind turbine blades.

Experimental Investigation and Finite Element Analysis of the Inversion of Capped End Frusta as Impact Energy Absorbers

2004 ◽  
Author(s):  
A. A. N. Aljawi ◽  
A. A. A. Alghamdi ◽  
T. M. N. Abu-Mansour
Keyword(s):  
Experimental Investigation ◽  
Finite Element ◽  
Testing Machine ◽  
Dynamic Test ◽  
Element Analysis ◽  
Static Tests ◽  
Qualitative Dynamic ◽  
Finite Element Package ◽  
Energy Absorbers ◽  
Deformation Modes

In this paper, an innovative mode of deformation of the frusta is presented and discussed in details. A full experimental investigation for the quasi-static axial inversion of right circular frusta is given. The experimental work includes studying the effect of frusta wall thickness, angle of frusta and material type on the inversion of the frusta. The quasi-static tests were conducted on an Instron Universal testing machine and qualitative dynamic test were carried using Drop Hammer Facility. Finite element (FE) modeling of the inversion mode is carried out by using ABAQUS FE package. Analysis of the deformation modes is examined using a non-linear model of the finite element package. The FE findings are reported and modes of deformation during the inversion of aluminum frusta are described under quasi-static and dynamic cases. Furthermore, a good agreement is reported between the finite element force histories and the experimental results.

scholarly journals The motion equation of turbine blade by the finite element method

1997 ◽  
Vol 15 (4) ◽  
pp. 42-48
Author(s):  
Trinh Van Tin
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Turbine Blade ◽  
Digital Computer ◽  
Turbine Blades ◽  
Motion Equation ◽  
The Finite Element Method ◽  
Structural Dynamic ◽  
Vibration Problems ◽  
Element Method

In this paper, the finite element method has been applied to deriving the motion equation of turbine blade in coupled bending - bending - torsion vibrations. These equations permit us to develop straightforwardly digital computer programs for studying vibration problems of turbine blades in turbo machinery as well as in other structural dynamic applications.

Design and Optimization of Composite Offshore Wind Turbine Blades

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
M. Tarfaoui ◽  
O. R. Shah ◽  
M. Nachtane
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Turbine Blades ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Skin Thickness ◽  
Wind Turbine Blades ◽  
Element Analysis

In order to obtain an optimal design of composite offshore wind turbine blade, take into account all the structural properties and the limiting conditions applied as close as possible to real cases. This work is divided into two stages: the aerodynamic design and the structural design. The optimal blade structural configuration was determined through a parametric study by using a finite element method. The skin thickness, thickness and width of the spar flange, and thickness, location, and length of the front and rear spar web were varied until design criteria were satisfied. The purpose of this article is to provide the designer with all the tools required to model and optimize the blades. The aerodynamic performance has been covered in this study using blade element momentum (BEM) method to calculate the loads applied to the turbine blade during service and extreme stormy conditions, and the finite element analysis was performed by using abaqus code to predict the most critical damage behavior and to apprehend and obtain knowledge of the complex structural behavior of wind turbine blades. The approach developed based on the nonlinear finite element analysis using mean values for the material properties and the failure criteria of Hashin to predict failure modes in large structures and to identify the sensitive zones.

scholarly journals Theoretical Analysis of Gas Turbine Blades by Finite Element Method

1970 ◽  
Vol 8 (1-2) ◽  
pp. 1-11
Author(s):  
B. Deepanraj ◽  
P. Lawrence
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Temperature Distribution ◽  
Gas Turbine ◽  
Turbine Blade ◽  
Turbine Blades ◽  
Optimum Number ◽  
Element Analysis ◽  
Gas Turbine Blades ◽  
Functional Part

Gas turbine is an important functional part of many applications. Cooling of blades has been a major concern since they are in a high temperature environment. Various techniques have been proposed for the cooling of blades and one such technique is to have axial holes along the blade span. Finite element analysis is used to analyze thermal and structural performance due to the loading condition, with material properties of Titanium- Aluminum Alloy. Six different models with different number of holes (7, 8, 9, 10, 11, 12) where analyzed in this paper to find out the optimum number of holes for good performance. In Finite element analysis, first thermal analysis followed by structural analysis is carried out. Graphs plotted for temperature distribution for existing design (12 holes) and for 8 holes against time. 2D and 3D model of the blade with cooling passages are shown. Using ANSYS, bending stress, deflection, temperature distribution for number of holes are analyzed. Results have been discussed and we found that when the numbers of holes are increased in the blade, the temperature distribution falls down. For the blade configuration with 8 holes, the temperature near to the required value i.e., 800oC is obtained. Thus a turbine blade with 8 holes configuration is found to be the optimum solution.Keywords: Gas turbine blade; Stress; Deflection; Temperature distributionDOI: http://dx.doi.org/10.3126/jie.v8i1-2.5092Journal of the Institute of Engineering Vol. 8, No. 1&2, 2010/2011Page : 1-11Uploaded Date: 19 July, 2011

scholarly journals Finite Element Analysis of Tidal Turbine Blade Subjected to Impact Loads from Sea Animals

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7208
Author(s):  
Ilias Gavriilidis ◽  
Yuner Huang
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Turbine Blade ◽  
Turbine Blades ◽  
Real Life ◽  
Impact Loads ◽  
Element Analysis ◽  
Tidal Turbine ◽  
Tidal Stream ◽  
Tidal Stream Turbine

The present work investigates structural response of tidal stream turbine blades subjected to impact loads from sea animals. A full-scale tidal turbine blade model was developed using a finite element modelling software ABAQUS, while a simplified geometry of an adult killer whale (Orcinus orca) was assumed in simulating impact on the blade. The foil profiles along the turbine blade were based on the NACA 63-8XX series, while the geometric and material properties of the sea animal were calibrated with experimental results. The numerical model simulated the dynamic response of the blade, accounting for radial velocities of the blade corresponding to real life scenarios. Different magnitudes and trajectories of the velocity vector of the sea animal were simulated, in order to investigate their influence on the turbine blade’s plastic deformation. Furthermore, multiple impacts were analysed, in order to monitor the accumulation of plastic strain in the material of the blade. Finally, the potential application of stainless steel material in tidal stream turbine blades for impact resistance was evaluated, through comparison of numerical results obtained from models using stainless steel and mild carbon steel materials.

scholarly journals Boundary-Layer Transition Regions on Turbine Blade Suction Surfaces

1984 ◽  
Author(s):  
G. Roberts ◽  
A. Brown
Keyword(s):  
Boundary Layer ◽  
Experimental Investigation ◽  
Turbine Blade ◽  
Turbine Blades ◽  
Boundary Layer Transition ◽  
Transition Model ◽  
Computer Programme ◽  
Layer Transition

This paper describes the results of an experimental investigation into extended boundary-layer transition regions on suction surfaces of four sets of turbine blades in a cascade rig. A transition model is proposed which is tested with some success in a modified version of STAN5, a boundary-layer computer programme.

Finite Element Analysis of 5MW Fiberglass and Carbon Fiber Wind Turbine Blade

2011 ◽  
Vol 418-420 ◽  
pp. 606-609 ◽  
Author(s):  
Tian De ◽  
Guang Hua Chen ◽  
Jian Mei Zhang
Keyword(s):  
Finite Element ◽  
Carbon Fiber ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Turbine Blades ◽  
Limit Load ◽  
Element Model ◽  
Wind Turbine Blade ◽  
Horizontal Axis Wind Turbine ◽  
Element Analysis

Abstract: Base on finite element method of composite, take 5MW horizontal axis wind turbine blades as example, skin uses a mixture of fiberglass and carbon fiber as ply, spar caps and web adopt carbon fiber ply entirely to build the finite element model of the blade. The total weigh of the blade is 20.2 ton. Use Bladed software calculated the limit load of each cross-section, analyzed the stress distribution of each section and the modal characteristics of the blade, these provide a theoretical reference for the application of carbon fiber using on MW class wind turbine blade.

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