新型叠片式油冷却器综合性能的数值研究

摘要

A three-dimensional model of new laminated oil cooler was established.And using FLUENT to analyze its heat transfer and pressure drop characteristics under different baffle spacing and gap height conditions.An experiment was carried out to demonstrate the accuracy of the simulation results.Using comprehensive factor(α/Δp) to evaluate heat transfer performance.The results showed that the shell side heat transfer coefficient and pressure drop became higher with the decreasing of baffle spacing and baffles gap height had little effect on the shell side pressure drop.Shell heat transfer coefficient increased slightly with gap height decreased.When the baffle plate spacing is 90 mm and gap height is 0.2D,laminated oil cooler had better comprehensive heat transfer performance.The results of simulation and experiment agree well,so conclusions have certain reference value.%对新型叠片式油冷却器进行整体三维建模,并使用FLUENT对其在不同折流板间距和缺口高度条件下进行换热与阻力性能数值分析,对模拟结果准确性进行试验论证,采用综合因子α/Δp对传热性能进行综合评价. 结果表明:折流板间距越小,壳程传热系数和压降越大,折流板缺口高度对壳程压降影响不大,壳程传热系数随缺口高度减小增幅较小;折流板间距为90 mm,缺口高度为0.2D时,有较好的综合传热性能. 模拟结果和试验吻合度良好,因此研究结论具有一定参考意义.