Finite Element Analysis of Steam Turbine Components for Real Life Assessment Studies of 210 MW Steam Turbine

Autor/innen

  • Dr.C C Handa Professor & Head, Department of Mechanical Engineering, KDK College of Engineering, Nandanwan, Nagpur-440009
  • Dr.A. V. Vanalkar Professor, Department of Mechanical Engineering, KDK College of Engineering, Nandanwan, Nagpur-440009
  • Dr.S. K. Nath Mechanical Engineering Division, Central Power Research Institute, Thermal Research Centre (A Government of India Society, Ministry of Power), Koradi, Nagpur, India

Schlagwörter:

Steam turbine rotor, transient thermal stresses, FEM, Ansys, transient thermo-mechanical stresses

Abstract

 The turbine rotor or steam turbine rotor is subjected to temperature variations in short periods of time due to the start and stop cycles of the turbine. This causes sudden changes in the temperature with transient thermal stresses being induced into the turbine rotor. The transient effect is due to the changes in the material properties like density, specific heat and Young’s modulus. The estimate of thermal stresses induced in the turbine rotor is important in determining the startup cycle of a steam turbine. Thermal gradients developed during thermal transients are the key source of stress generation in the rotor. The “heart” of these versatile machines is made by the blades and vanes, which are subjected during operation to very high thermal and mechanical stresses (combined effects of centrifugal force and thermal gradient).The high-pressure turbine model was prepared using CAD software (PRO-E) and axis symmetric F. E. model was analyzed for transient thermal and thermo-mechanical stresses using Ansys 11.The transient thermal and thermo-mechanical stress values found were within the yield strength of the material. It can be stated that the transient thermal and thermo-mechanical stresses are larger than the steady-state stresses. Keywords: Steam turbine rotor, transient thermal stresses, FEM, Ansys, transient thermo-mechanical stresses 

Downloads

Veröffentlicht

2012-09-08

Ausgabe

Bd. 2 Nr. 2 (2012)

Rubrik

Research Articles

Lizenz

Declaration and Copyright Transfer Form

(to be completed by authors)

 

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

·         I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.

·         I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).

·         I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.

·          I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. _______________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.