Title

A coupled FVM/BEM approach for conjugate heat transfer in turbine blades

Abstract

A coupled analysis method was developed for the conjugate problem of convection heat transfer over and conduction heat transfer within turbine blades. The fluid flow field and forced convection heat transfer external to the blade were resolved by numerically solving the time dependent Navier-Stokes equations using a finite volume method(FVM) on a non-skewed shifted periodic grid. The temperature Field within the blade was calculated by solving the conduction equation using a boundary element method(BEM). The boundary discretization used for the generation of the computational grid for the external flow provided the boundary discretization required for the BEM. A steady state BEM code is used at each time step as only a steady state solution of the conjugate problem is sought. The conjugate solution of the external fluid flow and internal conduction heat transfer was obtained iteratively. An initial guess for the steady state external fluid flow field and temperature field is determined by first subjecting the blade surface to an adiabatic condition. The blade surface temperatures are used as input to the BEM solver. Boundary fluxes are then computed and used as input for the flow solver for the next time step. The iteration is continued until convergence of bot.h solutions is achieved. Validation of the FVM code against experimental results for a constant wall temperature is first presented. Numerical results are then presented for the conjugate problem at transonic speeds.

Publication Date

1-1-1994

Publication Title

AIAA/ASME 6th Joint Thermophysics and Heat Transfer Conference, 1994

Document Type

Article; Proceedings Paper

Identifier

scopus

Personal Identifier

scopus

Socpus ID

85032068729 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85032068729

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