Numerical analyses of heat transfer and thermal stress in a ZrB2 gas turbine stator blade

Farhad Sadegh Moghanlou, Mohammad Vajdi, Amir Motallebzadeh, Jianjun Sha, Mohammadreza Shokouhimehr, Mehdi Shahedi Asl*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)

Abstract

Temperature of burned gases is a key parameter in output works of gas turbines. Nevertheless, high temperatures cause metallurgical problems in the turbine parts, specially the blades. Hence, ZrB2 as an ultra-high temperature ceramic (UHTC) with a melting point of 3246°C, considerable high-temperature strength and relatively high thermal conductivity can be a proper candidate for manufacturing of gas turbine parts. In the present work, heat transfer and related thermal stresses of a gas turbine stator blade made of ZrB2 ceramic is investigated numerically by means of Comsol Multiphysics software and the obtained data are compared with M152 (UNS S64152) alloy. The results showed that ZrB2 has more uniform temperature distribution than M152, which is corresponded to its lower thermal gradient. Due to its lower thermal expansion coefficient, ZrB2 showed lower total displacement than M152 which is an important parameter in blade performance. Also, the Von Mises stress of ZrB2 showed higher value than M152.

Original languageEnglish
Pages (from-to)17742-17750
Number of pages9
JournalCeramics International
Volume45
Issue number14
DOIs
Publication statusPublished - 1 Oct 2019
Externally publishedYes

Keywords

  • Gas turbine
  • Numerical method
  • Stator blade
  • Thermal stress
  • Zirconium diboride

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