چكيده به لاتين
Abstract:
This thesis aims mainly to simulate the Sandia Flame D using OpenFOAM by adding a thermal radiation model to the OpenFOAM solver. First, simulations were carried out using the standard OpenFOAM solver without the radiation model and then using a modified solver, comparing the results in the end to determine the impacts of radiation heat transfer on the Sandia Flame D as regards temperature distribution and its effects on the products of combustion. The integration of the radiation model is followed by a comparison between two different combustion models to examine the chemistry and turbulence interaction. Further, the effects of preheating the fuel, the pilot diameter, and ambient temperature are examined. The numerical simulations were carried out by the solver developed in OpenFOAM source code based on the finite-volume method. The Favre-based Reynolds model was used to model turbulence. The working fluid was assumed a gray material capable of absorption, emission, and scattering. A radiative transfer equation was solved by the spherical harmonics method. The PIMPLE algorithm was employed to solve the coupled equations of pressure and velocity. Results indicated that the use of the modified reactingFoam solver reduced computational error in predicting the temperature by nearly 13% in some zones and by approximately 5% for some products of combustion. Ambient temperature variations had no effects on the temperature and kinetic conditions of the flame.
Keywords:.
OpenFOAM, Sandia flame D, Non-premixed flame, Thermal radiation heat transfer, Turbulent flow, Favre-averaged, Eddy dissipation concept, Partially stirred reactor
