顶燃蓄热式热风炉底部空间空气流动特性模拟研究

Numerical Study on Flow Character in Bottom Zone of Top Combustion Regenerative Hot Air Stove

顶燃蓄热式热风炉具有蓄热面积大、结构对称强度高、热效率高、送风温度高、生产维护费用低和使用寿命长等优点,具有广阔的发展前景。优化热风炉结构、改善流动状况、提高热风炉风温是目前热风炉研究的重点方向。通过建立顶燃蓄热式热风炉底部空间内气体流动的三维数学模型,模拟底部空间内空气的流动过程,分析空气流经支撑柱绕流时的流动规律,对比研究不同挡板结构对底部空间内流场及进入蓄热体气体流动均匀性的影响,从而获得最优化的挡板结构。研究结果对热风炉结构优化、进一步提高热风炉风温、节约能源和保护环境有指导意义。

Top combustion regenerative hot air stove has a wide application prospect because of the following advan- tages： large heat storage area, high strength structure, high thermal efficiency, high hot air temperature, low main- tenance costs and long life. Now, most researches about hot air stove focus on the structure optimization, flow structure improvement and further increasing hot air temperature. In this study, a three-dimension mathematical model was built to simulate the flow field in bottom zone of hot air stove, understand the flow theory as the fluid pass the support pillar. Furthermore, several different structure dam-boards were designed, and the influence of the different structure to the flow field was analyzed. The results of this study enrich the top combustion regenerative hot blast stove theory, and provide the theoretical reference for the top combustion hot blast stove structure optimi- zation, increasing the hot air temperature, saving energy and protecting environments.