APPLICATION OF CHIMERA UNSTRUCTURED HYBRID GRIDS FOR CONJUGATE HEAT-TRANSFER/

A method is presented that computes the conjugate heat transfer proble m using a hybrid overset grid system. The hybrid grids for the fluid a nd solid structure regions use Chimera overset structured grids and un structured grids, respectively. The numerical analyses require the flo wfield solution and material thermal response to be obtained simultane ously. A continuous transfer of temperature and heat flux is enforced at the interface, which combines the solid structure and the fluid dow regions into an integral system. Numerical results are compared with analytical and experimental data for a flat plate and a C3X cooled tur bine cascade. A simplified drum-disk system is also simulated to show the effectiveness of this hybrid grid system.