Elliptic trailing edge for a turbine blade: Aerodynamic and aerothermal effects

Mahmoud Moustafa El-Gendi, Sang Wook Lee, Chang Yeol Joh, Geun Sik Lee, Chang Ho Son, Wui Jun Chung

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Three-dimensional flow simulations through a turbine cascade are carried out for an exit isentropic Mach number of 0.79. The objective of the present study is to qualitatively and quantitatively clarify the effect of using an elliptic trailing edge (TE) instead of a circular one on the flow. Calculations are carried out using a parallel, turbulent, structured, singleblock code and the delayed detached eddy simulation is employed for turbulence. We maintain the TE thickness (minor axis) and modify the other axis (major axis). Time-averaged pressure and heat transfer coefficient distributions along the blade are presented with more attention paid to the TE region. The results show that increasing the major-to-minor axis ratio decreases both the heat transfer coefficient and loss. Therefore, designers can adjust this ratio according to application needs.

Original languageEnglish
Pages (from-to)82-89
Number of pages8
JournalTransactions of the Japan Society for Aeronautical and Space Sciences
Volume56
Issue number2
DOIs
Publication statusPublished - Mar 2013
Externally publishedYes

Keywords

  • Base Pressure
  • CFD
  • Heat Transfer
  • Trailing Edge
  • Turbine Flow

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

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