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液体乙醇在微细尺度陶瓷管中流动和管口燃烧,通过实验和数值模拟的方法研究了乙醇微火焰结构和火焰中心温度以及陶瓷管口温度与雷诺数Re的关系。结果表明,Re 15时,火焰高度和宽度无量纲与Re呈线性关系;1518时,火焰高度无量纲与Re又呈线性关系,火焰宽度无量纲在小范围水平波动。火焰中心温度和陶瓷管口外壁温度总体趋势是随Re的增加而增加。同时,实验拍摄图的火焰结构与数值模拟温度图高温区结构近似;火焰高度和宽度无量纲、火焰中心温度及陶瓷管口外壁温度的数值模拟值与实验计算值吻合良好。
The liquid ethanol flowed in the micro-scale ceramic tube and the nozzle was burned. The relationship between the micro-flame structure of ethanol and the flame center temperature and the temperature of the ceramic nozzle and the Re Reynolds number Re were studied by experiments and numerical simulation. The results show that the flame height and width have a linear relationship with Re at dimension 15 and a dimensionless fluctuation in the dimension and height of the flame at 15 18, Linear relationship, flame width dimensionless fluctuations in a small range. The general trend of the flame center temperature and the temperature of the outer wall of the ceramic nozzle increases with the increase of Re. In the meantime, the flame structure of the experimental photograph is similar to that of the high temperature region of the temperature diagram of the numerical simulation. The numerical values of the flame height and width dimensionlessness, the flame center temperature and the temperature of the outer wall of the ceramic nozzle are in good agreement with the experimental values.