Open AccessThe CFD simulation of reactive flow in parallel flow regenerative shaft kilns using porous media model
Author(s) -
Kamyar Mohammadpour,
Ali Alkhalaf,
Ali Chitsazan,
Eckehard Specht
Publication year - 2022
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci210628281m
Subject(s) - packed bed , kiln , porous medium , combustor , materials science , porosity , combustion , flow (mathematics) , computational fluid dynamics , mechanics , heat transfer , homogenization (climate) , spheres , waste management , environmental science , composite material , chemical engineering , chemistry , engineering , physics , biodiversity , ecology , organic chemistry , metallurgy , biology , aerospace engineering
Understanding the flow pattern of the gas jets in packed beds can have considerable significance in improving reactor design and process optimization. This study researches the fuel diffusion in the radial direction and the flame length in a packed bed of a parallel flow regenerative shaft kiln. This kiln is characterized that the fuel is injected vertically in the packed bed using a lot of lances in the cross-section while the combustion air is distributed continuously. Such a large, packed bed has to be approximated as a porous media. This assumption is used to model the reactive flow in the kilns. Using a box with 700 spheres of 52 mm spheres in body-centered cube arrangement the local concentrations of injected nitrogen in air-flow were measured. The measured values match approximately with those calculated with the porous media model. The studied parameters are the number of burners and burner arrangements. The radial mixing of fuel and air in a packed bed is relatively bad. Therefore, a lot of burners are needed for better temperature homogenization in the cross-section