大型马蹄焰玻璃熔窑火焰空间气体动力学特征数值模拟研究

Mathematical Simulation Research on Dynamic Feature of U Flame in End-port Glass Furnace

在本文的马蹄焰玻璃熔窑火焰空间气体动力学数值模拟中,关联了火焰空间的几何构型,小炉火焰出口速度,下倾角度等等基本因素,数值模拟结果显示马蹄焰流股特性上述几个要素密切相关。为适应池窑内玻璃液熔制工艺要求,在熔窑规模增加中强化纵长方向的扩张,则给马蹄焰的燃烧过程组织带来极大困难。对于窄长的窑型,入射火焰流股远程动力减弱,马蹄焰回转不够流畅;若增加火焰流股的远程动力,则火焰流股近程覆盖力减弱。若增加火焰流股入射速度同时增加小炉下倾角,则虽然火焰的近程覆盖力增加,但火焰流股受到阻滞,远程动力减弱。

A research has been done on U flame dynamics in combustion space with numerical simulation, associated with the space geometry, the air import rate , inclination angle of combustion port, and other fundamentals. Simulation results show that U flame-flow characteristics are closely related with the above-mentioned factors. To improve the melting technology in glass molten tank, the combustion space should expand along the longitudinal direction, but this will hamper the U flame combustion process. For the narrow configuration, U flame stream will be weakened at long range, and the U flame can not turn smoothly enough at end wall; if the dynamics of U flame stream is increased at long range, then the flame coverage on short range will be weakened.