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为了提升散热器综合性能,保持车辆工作性能稳定,根据生产商提供的几何参数,应用计算流体力学对管片式散热器单元性能进行数值计算,将结果与试验数据对比,以验证仿真模型的准确性.以尽量保持散热面积为前提,提出以NACA0018翼型作为热管特征,计算并对比两者的JF因子,进一步讨论其与NACA0012,NACA0021间的换热系数和压力损失差异.仿真结果表明:通过对散热器单元体的数值模拟,可在一定误差范围内获取散热器冷侧换热系数和压力损失;与扁平管翅片结构相比,仿真区间内翼型热管翅片的JF因子略高,当流速达到12m/s时,JF评价因子高出约15.97%;与NACA0018相比,NACA0021具有较高的换热系数和压力损失,设计时应根据相对厚度酌情选择.
In order to enhance the overall performance of the radiator and maintain the stable performance of the vehicle, according to the geometric parameters provided by the manufacturer, computational fluid dynamics is used to calculate the performance of the tube-and-tube radiator unit. The results are compared with the experimental data to verify the accuracy of the simulation model In order to keep the heat dissipation area as a prerequisite, this paper proposes to use the NACA0018 airfoil as the heat pipe characteristics, to calculate and compare the JF factors and to further discuss the heat exchange coefficient and pressure loss difference between them with NACA0012 and NACA0021.The simulation results show that: The numerical simulation of the radiator unit body can obtain the radiator side heat transfer coefficient and pressure loss within a certain error range. Compared with the flat tube fin structure, the JF factor of the airfoil heat pipe fin in the simulation section is slightly higher, When the flow rate reaches 12m / s, the JF evaluation factor is about 15.97% higher. Compared with NACA0018, NACA0021 has a higher heat transfer coefficient and pressure loss. The design should be based on the relative thickness as appropriate.