单相机油介质在螺旋槽纹管中的流场数值模拟

Flow-Field Numerical Simulation on Single-Phase Oil Medium in the Spiral Groove Grain Tube

根据螺旋槽纹管的特点,以机油为介质,建立了三维螺旋槽纹管的物理模型和数学模型;采用SIMPLE算法,数值模拟了单相机油介质在三维螺旋槽纹管中流动过程;紊流模型采用Realiable k-ε模型,揭示了油流在受到螺旋槽纹影响时的流动规律。通过数值模拟结果可知:螺旋槽纹管内机油换热主要通过加强壁面油流层附近流体的扰动,使管内换热得以强化;螺旋槽纹管与光滑管阻力损失系数比约为4,与实验数据很好地相吻合,可为优化以油为介质的换热器参数的设计、提高换热效率提供一定的理论依据。

According to the characteristics of the spiral groove tube lines,to the oil for medium,the three-dimensional spiral groove line of physical and mathematical model were built up,using SIMPLE algorithm,the flow process of the single-phase oil medium in three-dimensional spiral groove grain tube numerically was simulated.Using Realiable k-ε model for the turbulence model,revealed the flow pattern of oil by the influence of spiral groove in grain.The simulation results show that oil in the spiral groove grain tube exchange heat mainly by the way of strengthening the disturbance near the surface layer of fluid,heat exchange inside the tube is strengthened.It simulates the rate of the resistance loss coefficient of spiral groove grain tube and that about smooth tube which is about 4,which experimental data error is smaller.The simulation provides certain theoretical basis to optimize for heat exchanger design parameter which using oil for medium,and to improve the heat transfer efficiency.