【摘要】 考虑到重复试验和简化计算的需要,利用三个不同大小的蘑菇状铸铝热感受体模型代替实际固态颗粒物料进行实验。将铝制热感受体模型浸入热水中,分别在有超声波搅拌作用下和没有超声波搅拌作用下,用温度自动定时记录仪,通过热电偶,记录铝制热感受体模型的温度变化情况。根据传热方程计算不同试验条件下流体对固态颗粒的对流传热系数。试验结果表明,采用超声波搅拌,能明显地提高流体对固态颗粒的对流传热系数,其提高程度与固态颗粒的大小及单位质量流体内输入的超声波能量的多少有关。更多还原

【Abstract】 Considering for repeat tests and simplifing calculation three mushroom shaped aluminium transducer particles were immersed in high-temperature liquids with and without sonic agitation,and temperature histories recorded. Convective coefficients were calculated from the solution to the lumped convective heat transfer equation.Results in- dicate that fluid to particle heat transfer is significantly enhanced by the use of sonic energy,the amount of advantage being dependent on particle size and energy input per unit fluid mass.更多还原