研究了湍流条件下固-液两相流体对流换热系数的增加值。实验比较了纳米级和微米级颗粒对基液对流换热系数变化的影响,加入固体颗粒可以有效地改善流体的换热能力。实验结果发现纳米级颗粒悬浮液的对流换热系数提高较微米级颗粒悬浮液更为明显,对流换热系数随着管式加热炉温度的升高略有增大,同时探讨了纳米流体换热效果较好的原因。 The added value of convective heat transfer coefficient of solid-liquid two-phase fluid under turbulent flow conditions is studied. Experiments were conducted to compare the effects of nanoscale and micron-sized particles on the convective heat transfer coefficient variation of the base fluid. Adding solid particles can effectively improve the heat transfer capacity of the fluid. The experimental results show that the convective heat transfer coefficient of the nanoscale particle suspension is more pronounced than that of the micron-sized particle suspension, and the convection heat transfer coefficient increases slightly with the increase of the tube furnace temperature. Meanwhile, The reason is better.