scholarly journals CFD-based shape optimization of steam turbine blade cascade in transonic two phase flows

2017 ◽  
Vol 112 ◽  
pp. 1575-1589 ◽  
Author(s):  
S.M.A. Noori Rahim Abadi ◽  
A. Ahmadpour ◽  
S.M.N.R. Abadi ◽  
J.P. Meyer
Keyword(s):  
Shape Optimization ◽  
Steam Turbine ◽  
Turbine Blade ◽  
Two Phase Flows ◽  
Two Phase ◽  
Blade Cascade ◽  
Steam Turbine Blade

The best angle of hot steam injection holes in the 3D steam turbine blade cascade

2022 ◽  
Vol 173 ◽  
pp. 107387
Author(s):  
Amir Kafaei ◽  
Fahime Salmani ◽  
Esmail Lakzian ◽  
Włodzimierz Wróblewski ◽  
Mikhail S. Vlaskin ◽  
...  
Keyword(s):  
Steam Turbine ◽  
Turbine Blade ◽  
Steam Injection ◽  
Blade Cascade ◽  
Steam Turbine Blade

A comprehensive investigation of finding the best location for hot steam injection into the wet steam turbine blade cascade

Energy ◽  
2020 ◽  
Vol 190 ◽  
pp. 116397 ◽  
Author(s):  
Mohammad Ali Faghih Aliabadi ◽  
Esmail Lakzian ◽  
Iman Khazaei ◽  
Ali Jahangiri
Keyword(s):  
Steam Turbine ◽  
Turbine Blade ◽  
Steam Injection ◽  
Wet Steam ◽  
Comprehensive Investigation ◽  
Blade Cascade ◽  
Steam Turbine Blade

Investigation of Geometry, Total Condition and Waves Effect on Two Phase Liquid-Vapor Flow Using Equilibrium Thermodynamics

2012 ◽  
Author(s):  
H. Beheshti Amiri ◽  
A. A. Piroozi ◽  
S. Hamidi ◽  
M. J. Kermani
Keyword(s):  
Steam Turbine ◽  
Turbine Blade ◽  
Ideal Gas ◽  
Steam Flow ◽  
Vapor Flow ◽  
Equilibrium Thermodynamics ◽  
Two Phase ◽  
Expansion Fan ◽  
Steam Turbine Blade ◽  
Flow Through

In this paper, a numerical method is presented to solve the two-dimensional two-phase steam flow over a series of geometries (such as nozzles, expansion corners and steam turbine blade-to-blade passages) by means of equilibrium thermodynamics model. The flow is assumed to be compressible and inviscid and obeys the ideal gas equation of state. The resulted equations are then numerically solved by the Roe’s FDS time marching scheme that has recently been modified to allow for two-phase effects. Validations of condensing steam flow through vapor nozzles have been performed, where good agreement has been achieved. Detailed parametric studies monitoring the influence of (I) the geometry expansion rate, (II) the inlet total temperature and pressure, and (III) the expansion fan or shock waves on the location of condensation onset and the rate of condensation are given. Finally as a case study, expansion of steam flow through a steam turbine blade-to-blade passage is considered, and condensation or evaporation of the steam flow through the passage and fate of the wet flow through the fan or shocks were observed.

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

Studies on Determination of Natural Frequencies of Industrial Turbine Blades

1995 ◽  
Author(s):  
Mahesh M. Bhat ◽  
V. Ramamurti ◽  
C. Sujatha
Keyword(s):  
Steam Turbine ◽  
Dynamic Behavior ◽  
Turbine Blade ◽  
Natural Frequencies ◽  
Complex Structure ◽  
Turbine Blades ◽  
Blade Root ◽  
Steam Turbine Blade ◽  
Manufacturing Tolerances

Abstract Steam turbine blade is a very complex structure. It has geometric complexities like variation of twist, taper, width and thickness along its length. Most of the time these variations are not uniform. Apart from these geometric complexities, the blades are coupled by means of lacing wire, lacing rod or shroud. Blades are attached to a flexible disc which contributes to the dynamic behavior of the blade. Root fixity also plays an important role in this behavior. There is a considerable variation in the frequencies of blades of newly assembled turbine and frequencies after some hours of running. Again because of manufacturing tolerances there can be some variation in the blade to blade frequencies. Determination of natural frequencies of the blade is therefore a very critical job. Problems associated with typical industrial turbine bladed discs of a 235 MW steam turbine are highlighted in this paper.

Failure analysis of the 350MW steam turbine blade root

2009 ◽  
Vol 16 (4) ◽  
pp. 1270-1281 ◽  
Author(s):  
J. Kubiak Sz ◽  
J.A. Segura ◽  
G. Gonzalez R ◽  
J.C. García ◽  
F. Sierra E ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Steam Turbine ◽  
Turbine Blade ◽  
Blade Root ◽  
Steam Turbine Blade
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