Finite element modeling of the electron beam welding of Inconel-713LC gas turbine blades

2017 ◽  
Vol 26 ◽  
pp. 339-354 ◽  
Author(s):  
Ali Bonakdar ◽  
Marjan Molavi-Zarandi ◽  
Ahmad Chamanfar ◽  
Mohammad Jahazi ◽  
Arash Firoozrai ◽  
...  
Keyword(s):  
Finite Element ◽  
Electron Beam ◽  
Finite Element Modeling ◽  
Gas Turbine ◽  
Electron Beam Welding ◽  
Turbine Blades ◽  
Gas Turbine Blades ◽  
Element Modeling

Finite Element Modeling of the Eddy-Current Inspection of Land-Based Gas Turbine Blades

2001 ◽  
Author(s):  
Hiroyuki Fukutomi ◽  
Takashi Ogata
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Gas Turbine ◽  
Eddy Current ◽  
Gas Turbines ◽  
Turbine Blades ◽  
Combined Cycle ◽  
Multiple Cracks ◽  
Gas Turbine Blades ◽  
Element Modeling

There has been a growing need in recent technology of gas turbines in combined cycle to assess the remaining life of high temperature components. It is also required that the nondestructive assessment be more accurate in maintaining combined cycle plants. This paper describes the use of a simulator solving forward and inverse problems under eddy current testing, in parametric studies of inspection parameters for 1100°C-class gas turbine blades in terms of test probe capabilities, frequencies and signal interpretation. The simulator is based on a differential formulation constructed with a magnetic vector potential and a 3-dimensional edge-based finite-element modeling method. Its features are forming coils and defects independent of a whole finite element model, very fast eddy current response predictions, and identifications of electromagnetic properties. Using the simulator, optimal sensor types and test frequencies are determined in terms of assessment of degradation, selectability between surface-breaking and subsurface cracks, reconstruction of crack profiles, and detection of multiple cracks.

Cracking in fusion zone and heat affected zone of electron beam welded Inconel-713LC gas turbine blades

2015 ◽  
Vol 642 ◽  
pp. 230-240 ◽  
Author(s):  
A. Chamanfar ◽  
M. Jahazi ◽  
A. Bonakdar ◽  
E. Morin ◽  
A. Firoozrai
Keyword(s):  
Electron Beam ◽  
Gas Turbine ◽  
Fusion Zone ◽  
Heat Affected Zone ◽  
Turbine Blades ◽  
Gas Turbine Blades

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

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