نوع مقاله : مقاله پژوهشی
نویسندگان
1 تربیت مدرس
2 تربیت مدرس * مهندسی مکانیک
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this paper , large scale pool fire behavior has been investigated with Large Eddy Simulation ( LES ) . In order to investigate the efficiency of various combustion models in fire simulation , two combustion models of EDM ( Eddy Dissipation Model ) and infinite fast chemistry in two sub - grid scale ( SGS ) model of Smagorinsky and one-equation , was evaluated. The infinite fast chemistry model have an over - prediction in reaction rate , mean velocity and flame temperatures . In addition , the EDM model , due to the use of time characteristic of turbulence and diffusion , have more accurate results in prediction of temperature field and flow behaviors . The EDM model with one - equation SGS model have better prediction for velocity field and there is a difference of about 5 - 10 % with the experimental measurements . However , the infinite fast chemistry combustion model , can better fit with the Smagorinsky SGS than one - equation SGS model.
کلیدواژهها [English]