射流夹角对加热炉内温度分布的影响的数值模拟研究

Numerical simulation research on the influence of jet angle on temperature distribution inside the heating furnace

采用FLUNT软件,研究了射流夹角对高温蓄热式加热炉内温度场分布的影响。研究结果表明,当夹角由5°增加到50°时,炉内的最高温度和出口处的平均温度几乎呈线性降低,炉内平均温度成二次曲线变化,先增大后减小,并且炉膛内的高温区越靠近喷口处。最高温度出现在烧嘴喷口1 m左右处,大于1 m后温度变化不大,比较平缓。当烧嘴夹角为25°~35°,炉内和钢坯表面温度比较均匀。综合各方面的因素,钢坯放在射流夹角为25°~35°的加热炉内时,距离烧嘴喷口1 m处,可达到最好的加热效果。

The influence of jet angle on temperature field distribution in high temperature heat-stored heating furnace was studied by FLUNT software.The results show that when the jet angle increases from 5° to 50°,the highest temperature inside the furnace and the average temperature at furnace exit are decreased linearly,and the average temperature inside the furnace increases at first and then decreases along the quadratic curve,meanwhile the highest temperature inside the furnace occurs near the nozzle and the relative distance is about 1 m.However,when the relative distance is larger than 1 m,the temperature has little changes and remains mild.When the jet angle is within 25°-35°,the temperature distribution inside the furnace and steel billet surface are more uniform.Considering all factors,the best heating effect occurs at the position of 1 m from the burner nozzle when steel billet is put in the heating furnace within the jet angle of 25°-35°.