玻璃窑炉蓄热室内温度场的数学模型

通过对玻璃窑炉蓄热室内传热和气体流动过程的分析,以热量平衡原理为基础,建立了温度场的数学模型。在该模型中,物性参数与换热系数均取作温度的函数。在单元节点上把格子砖的局部平均温度转化为局部表面温度,以计算换热系数,并应用集总换热系数来引入格子砖内部热传导的影响。文中给出了主导这一数学模型的基本方程,并用有限差分方法进行了数值计算。在马蹄焰玻璃窑炉蓄热室的操作条件下,实测结果与计算机数值结果有较好的一致性。运用数学模型的计算结果,能为蓄热室的实际设计和操作提供依据。

A mathematical model for the temperature field in a glass furnace regenerator

A mathematical model for the temperature distribution in a glass furnace regeneratorhas been proposed on the basis of heat balance. For the establishment of the model, thethermal parameters concerning the flowing gases with that of the checker bricks as well asthe heat transfer coefficients are taken into consideration as the functions of the tempera-ture. The local surface temperature translated from the local mean temperature of thechecker on the nodes was used to calculate the heat transfer coefficients, and the lumpedheat transfer coefficient was adopted to embody the effects of the intraconduction of thechecker brick. The above mentioned governing features of the model was thus consoli-dated into the mathmatical equations by which the necessary numerical computation couldbe solved by the method of finite difference. In the end-port glass making furnace regenerator, the measurements gained and thecomputation done under the condition interested are in good agreement, hence the calculatedresults of the thermal performance of the regenerators would provide a ready reference forthe designing and the operating work of any regenerators specified.