Simulation of Frictional Thermal Effect during Blade-to-Case Full Annular Rub

Abstract:

During blade-to-case full annular rub, the frictional thermal response characteristic of blade-to-case was analyzed by the finite element method. A thermal structure coupling finite element model of blade-to-case was established and the transient thermal and structural field was analyzed. The distributions of temperature field and equivalent stress field were obtained on the basis of a certain centrifugal force, friction coefficient and rotate speed of the blade. The numerical simulations have been conducted to show that the heat affected zone (HAZ) locates in a very thin layer of blade-to-case, and the thermal stress is very high in this layer. The thermal effect in the blade-to-case friction process is more obvious as the rotate speed of blade and centrifugal pressure are increased. In practice, it is suggested that the friction thermal effect in the process of rotor-stator rub-impact should not be ignored.

• Periodical: Applied Mechanics and Materials (Volume 743)
• Pages: 79-84
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.743.79
• Online since: March 2015
• Authors: L.L. Wang, Shun Ming Li, G.C. Tian, Ji Yong Li
• Keywords: Blade-To-Case, Frictional Thermal Effect, Rub-Impact, Thermal Structural Coupling

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