Coupling tabulated chemistry with compressible CFD solvers

Ronan Vicquelin (1, 2) , Benoit Fiorina (1) , Sandra Payet (2) , Nasser Darabiha (1) , Olivier Gicquel (1)

1 EM2C - Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion
2 Pôle CHENE, Centre de Recherche et d'Innovation Gaz et Energies Nouvelles

The present work focuses on the coupling between tabulated chemistry techniques with compressible solvers. In low Mach-number CFD solvers the coupling is straightforward because thermo-chemical quantities are directly read in a thermo-chemical database. However, because of perturbations introduced by acoustics, the coupling with fully compressible Navier-Stokes equations is not straightforward. In order to be consistent with tabulated chemistry framework, a new strategy to predict temperature field from the transported energy is developed. Boundary conditions are reformulated following Navier-Stokes Characteristic Boundary Conditions (NSCBC) formalism. The method called TTC (Tabulated Thermo-chemistry for Compressible flows) is implemented in a compressible CFD code and validated by comparison with multi-component simulations. Temperature computation and characteristic boundary conditions reformulations are first validated on one-dimensional tests. A three-dimensional non-reactive case is then computed by performing a large eddy simulation of a turbulent round jet. Finally, a one-dimensional laminar flame simulation assesses the method performances.

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]; Milieux fluides et réactifs

Ronan Vicquelin, Benoit Fiorina, Sandra Payet, Nasser Darabiha, Olivier Gicquel. Coupling tabulated chemistry with compressible CFD solvers. Proceeding of the combustion Institute, 2011, 33 (1), pp.1481-1488. ⟨10.1016/j.proci.2010.05.036⟩. ⟨hal-00491237⟩