利用计算流体力学(Computational Fluid Dynamic，CFD)方法，针对连续螺旋折流板换热器建立物理模型和数学模型，在管侧介质为水和壳侧介质为原油条件下，研究不同原油流量及螺旋角对螺旋折流板换热器内部流场、换热性能及阻力性能的影响，并拟合了水油换热时螺旋折流板换热器的Nu、f与Re的关联式。结果表明： 22°螺旋角的螺旋折流板换热器与其它较小螺旋角换热器对比，壳侧压降和换热系数逐渐减小，综合换热性能最佳。通过对壳侧原油为层流状态下的阻力系数和对流换热系数关系式进行拟合，更好地指导水-油连续螺旋折流板换热器的热力设计。

The physical and mathematical models of continuous spiral baffled heat exchanger were established by the method of CFD(Computational Fluid Dynamic).The effects of different crude oil flow rates and helix angles on the flow field,heat transfer and resistance performance of spiral baffled heat exchanger were studied under the conditions of water in the tube side and crude oil in the shell side,and the correlations of Nu,f and Re of the spiral baffled heat exchanger during wateroil heat exchange were fitted.The results show that compared with other smaller helix angle heat exchangers,the shell side pressure drop and heat transfer coefficients of spiral baffled heat exchanger with helix angle of 22° gradually decrease,and its comprehensive heat transfer performance is the best.The relationship between the resistance coefficient and the convective heat transfer coefficient in the case that the crude oil in the shell side is laminar flow is fitted to better guide the thermal design of the wateroil continuous spiral baffled heat exchanger.

TK221