scholarly journals Failure Analysis in Lacing Wire Of Last Stage Low Pressure Steam Turbine Blade

2021 ◽  
Vol 1096 (1) ◽  
pp. 012097
Author(s):  
A M Kongkong ◽  
H Setiawan ◽  
J Miftahul ◽  
A R Laksana ◽  
I Djunaedi ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Steam Turbine ◽  
Turbine Blade ◽  
Low Pressure ◽  
Pressure Steam ◽  
Steam Turbine Blade ◽  
Last Stage

scholarly journals Fracture analysis of a low pressure steam turbine blade

2016 ◽  
Vol 5-6 ◽  
pp. 39-50 ◽  
Author(s):  
Ernst Plesiutschnig ◽  
Patrick Fritzl ◽  
Norbert Enzinger ◽  
Christof Sommitsch
Keyword(s):  
Steam Turbine ◽  
Turbine Blade ◽  
Low Pressure ◽  
Fracture Analysis ◽  
Pressure Steam ◽  
Steam Turbine Blade

Dynamic Analysis of Low-Pressure Steam Turbine Last Stage Fir-Tree Root Blade

2020 ◽  
Vol 4 (2) ◽  
Author(s):  
Rajesh K. Bhamu ◽  
Aakash Shukla ◽  
Satish C. Sharma ◽  
S. P. Harsha
Keyword(s):  
Steam Turbine ◽  
Low Pressure ◽  
Crack Size ◽  
Pressure Steam ◽  
Element Approach ◽  
Steam Turbine Blade ◽  
Stiffness Variation ◽  
Last Stage ◽  
Excitation Pattern ◽  
Rotor Assembly

Abstract In the present study, the dynamic behavior of the last stage low-pressure steam turbine blade with fir-tree root at different conditions of blade root flank faces and their interfaces with rotor groove have been analyzed. Modal analysis has been done using a finite element approach to evaluate natural frequencies and evaluation of Campbell diagram generated under these conditions. For this, both healthy and defective blade have been taken. Since the variable crack size of fir-tree root flank has been taken, the excitation pattern has been evaluated due to stiffness variation of the cracked blade. This analysis provides the basis of excitation pattern of cracked blades due to inherent character and critical stressed zone. The outcome of this study forms the guidelines and checks during the fitting of blades in rotor assembly and its checks during health audit, overhaul, overspeed balancing test, and frequency turning.

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