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提出了颗粒碰撞壁面过程中颗粒打破边界层和颗粒与壁面导热的强化传热模型,以分析气固两相流中颗粒强化对流传热的机理,通过模型计算研究了风速、颗粒浓度和粒径等因素对颗粒在壁面的停留特性、颗粒在边界层的扰动及对导热和边界层破坏两种强化机制传热比重的影响.以气固两相流横掠圆管的传热过程为例进行计算,计算与实验结果一致,并获得了具有实用价值的关联计算式.
An enhanced heat transfer model was proposed to study the enhanced convective heat transfer in the gas-solid two-phase flow. The model was used to study the effects of wind speed, particle concentration and particle size And other factors on the particles stay in the wall properties, the particles in the boundary layer disturbance and the heat transfer and the destruction of the boundary layer two kinds of strengthening mechanisms heat transfer specific gravity. Taking the heat transfer process of the gas-solid two-phase flow traversing pipe as an example, the calculation is consistent with the experimental results, and the correlation calculation formula with practical value is obtained.