空气外掠钢渣颗粒准则关系式及其影响因素

发布时间：2018-04-13 12:38

  本文选题：钢渣 + 颗粒　； 参考：《工程科学学报》2016年09期

【摘要】：通过空冷固态高温钢渣颗粒实验,由实验数据拟合平均努塞尔数实验关联式.对空冷高温钢渣颗粒进行三维数值模拟,研究不同绕流雷诺数下的准则关系式,分析空气外掠固态钢渣颗粒影响因素.研究得出空气冷却固态钢渣颗粒的实验关联式与数值计算关联式,实验与数值计算之间误差较小,验证了采用SST k-ω模型计算的可靠性.实验结果表明:钢渣颗粒的平均努塞尔数随着绕流雷诺数、粒径和气体流速的增大而增大.在同等条件下,钢渣粒径对平均努塞尔数的影响作用大于气体流速;模拟空冷高温钢渣颗粒时,直径对钢渣颗粒凝固时间的影响作用最大,导热系数的影响作用次之,来流空气温度影响作用最小.
[Abstract]:The experimental correlation of average Nusselt number was fitted from the experimental data of air cooled solid steel slag particles.Three-dimensional numerical simulation of air-cooled high-temperature steel slag particles was carried out to study the criterion relationship under different flow Reynolds numbers and to analyze the influence factors of air swept solid steel slag particles.The experimental correlation formula and numerical calculation correlation formula of air-cooled solid steel slag particles are obtained. The error between experiment and numerical calculation is relatively small, which verifies the reliability of the calculation using SST k- 蠅 model.The experimental results show that the average Nusselle number of steel slag particles increases with the increase of Reynolds number, particle size and gas flow rate.Under the same conditions, the effect of the diameter of steel slag on the average Nussel number is greater than that of the gas flow rate, and the diameter has the greatest effect on the solidification time of the steel slag particle when simulating the air-cooled high-temperature steel slag particle, and the effect of the thermal conductivity is the second.The effect of air temperature is the least.
【作者单位】： 中南大学能源科学与工程学院;中南大学信息科学与工程学院;
【基金】：国家高技术研究发展计划资助项目(2009AA064603)
【分类号】：X757
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本文编号：1744520