چكيده به لاتين
In this thesis, the first and second chapters consist of a review on literature in particles cloud combustion and counterflow flames. The third and fourth chapters, focused on adiabatic and non-adiabatic modeling of particles cloud diffusion flames in a counterflow configuration with a front vaporization and vaporization zone. In this counterflow configuration, particles cloud are assumed as fuel and air as oxidizer which move toward stagnation plane from two opposed jets. It is assumed that dust clouds are vaporized to form a gaseous fuel to be oxidized in air. Furthermore, effects of geometric parameters such as particles diameter and dimensionless numbers such as Lewis number are investigated and obtained results are compared in both cases of adiabatic and non-adiabatic flame. In fifth chapter, heat recirculation phenomena in counterflow combustion of particles cloud is modeled. In sixth chapter, thermophoresis phenomena in counterflow combustion of particles cloud is modeled analytically. In this chapter, conservation equations are solved in each zone considering thermophoretic force effect. In seventh chapter, a new model is presented so as to study the behavior of oscillating flames in dimensionless coordinates of position – time. All variables are considered as a sum of a steady state solution and a small harmonic disturbance. Finally, time-dependent solutions are analyzed using perturbation method. In eighth chapter, the work concluded and suggestions for future works are proposed.
