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CompComparison of inviscid and viscous transonic flow field in VKI gas turbine blade cascadearison of inviscid and viscous transonic flow field in VKI gas turbine blade cascade

Authors
Journal
Alexandria Engineering Journal
1110-0168
Publisher
Elsevier
Volume
53
Issue
2
Identifiers
DOI: 10.1016/j.aej.2014.03.007
Keywords
  • Gas Turbine Cascade
  • Viscous Flow
  • Inviscid Flow
  • Turbulent Flow
  • Roe Scheme
  • Shock Creation

Abstract

Abstract In this paper, the viscous and inviscid flow fields of a gas turbine blade cascade are investigated. A two-dimensional CFD solver is developed to simulate the flow field through VKI blade cascade. A high resolution flux difference splitting scheme of Roe is applied to discretize the convective part of Navier–Stokes equations. Baldwin Lomax (BL) model is used to account for turbulent effects on the viscous flow field of the blade cascade. For validation of the code, the flow field was solved by Ansys Fluent commercial software. The flow solution was done by third order flux difference splitting scheme of Roe and k–ω turbulence model. The findings show that the high turbulent and the shock creation in the flow field, lead to the same results in viscous and inviscid flows. Also, the results show that the grid and solver’s focus must be on the precise prediction of the shock effects, when the shock is occurred in the domain.

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