Gas turbine disks are subject to mechanical stresses due to centrifugal forces exerted by the blades, as well as thermal stresses due to high temperature gradient. High stresses in the presence of elevated temperatures cause the rotating disk material to undergo considerable creep. This phenomenon is significant particularly in cases of turbine blades for power generators, which run almost continuously. Creep strains, in time, lead to deformations resulting in increase of the disk diameter, causing the clearance between blade tips and the turbine’s outer shell to reduce in time. As the above clearance gap is usually limited, this matter is of concern in the design of such equipment for long life. In this investigation, an optimization method is formulated, which is capable of proportioning the thickness distribution of inhomogeneous rotating disks under temperature gradient, so that their long term radii increase due to creep would be minimum. An example is given, which shows the viability of the method.
Skip Nav Destination
Article navigation
October 2011
Research Papers
Optimum Design of Inhomogeneous Rotating Disks for Minimum Creep Induced Radial Displacement
Jalal Bidabadi
Jalal Bidabadi
R&D Manager
Packman Co.
, Isfahan 85131–14891, Iran
Search for other works by this author on:
Behrooz Farshi
Senior Consultant
Jalal Bidabadi
R&D Manager
Packman Co.
, Isfahan 85131–14891, IranJ. Pressure Vessel Technol. Oct 2011, 133(5): 051206 (6 pages)
Published Online: July 14, 2011
Article history
Received:
April 24, 2010
Revised:
January 2, 2011
Online:
July 14, 2011
Published:
July 14, 2011
Citation
Farshi, B., and Bidabadi, J. (July 14, 2011). "Optimum Design of Inhomogeneous Rotating Disks for Minimum Creep Induced Radial Displacement." ASME. J. Pressure Vessel Technol. October 2011; 133(5): 051206. https://doi.org/10.1115/1.4003463
Download citation file:
Get Email Alerts
Cited By
The Behavior of Elbow Elements at Pure Bending Applications Compared to Beam and Shell Element Models
J. Pressure Vessel Technol (February 2025)
Related Articles
Design and Optimization of the Internal Cooling Channels of a High Pressure Turbine Blade—Part I: Methodology
J. Turbomach (April,2010)
Thermal-Mechanical
Life Prediction System for Anisotropic Turbine
Components
J. Turbomach (April,2006)
Biaxial Thermomechanical-Fatigue Life Property of a Directionally Solidified Ni-Base Superalloy
J. Eng. Gas Turbines Power (November,2008)
Modeling of Creep Behavior of a Rotating Disc in the Presence of Both Composition and Thermal Gradients
J. Eng. Mater. Technol (January,2005)
Related Proceedings Papers
Related Chapters
Polycrystalline Simulations of In-Reactor Deformation of Zircaloy-4 Cladding Tubes during Nominal Operating Conditions
Zirconium in the Nuclear Industry: 20th International Symposium
Basic Concepts
Design & Analysis of ASME Boiler and Pressure Vessel Components in the Creep Range
Members in Compression
Design & Analysis of ASME Boiler and Pressure Vessel Components in the Creep Range