LI Jie 1, LAI Ridong 2, WU Zhihao 1, LUO Tian 1
(1. School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, Jiangxi, China;
2. Guangdong Jumper Thermal Technology Co., Ltd, Foshan 528216, Guangdong, China)
Abstract: When using computational fluid dynamics software to simulate flow field and temperature field inside a continuous kiln such as the roller kiln in ceramic industry, with the porcelain blank in it, there are difficulties in dealing with the gas-solid coupling heat transfer of the moving porcelain blank in the kiln. In this paper, the porcelain blank region is treated as a fluid region and the outer wall of the porcelain blank is set as a coupling wall when using FLUENT software to simulate, and after that the flow field and temperature field of the gas and the porcelain blank district in the smoke exhaust section of a roller kiln were solved. Based on the simulation results, it can be concluded that in the mean heat flux and integrated heat transfer coefficient on the surface of the green body are respectively 8983 W·m−2 and 33.5 W·m−2·K−1. It is beneficial to energy saving if the distance between the 2nd and 3rd module’s smoke outlet in the kiln and the porcelain blank is properly reduced and the opening degree of the valves on the flue ducks and flue pipes is reasonably adjusted according to the actual situation.
Key words: smoke exhaust section of roller kiln; flow field and temperature field containing porcelain blank; numerical simulation; characteristics study; FLUENT soft war