板翅式热交换器中一种新型正弦波纹流道的数值模拟

采用数值模拟方法对板翅式热交换器周期性正弦流道中层流流体的传热性能进行研究,得出了翅片流道截面结构尺寸、振幅和波长对正弦流道传热综合性能的影响。结果表明,传热综合性能随截面宽度增大而降低,随着波长的增大而增大。截面高度对传热综合性能的影响呈现出不规律性,当截面高度5mm时综合性能最佳。振幅对综合性能的影响随雷诺数不同而不同,Re=50时随振幅增大综合性能不断降低;Re≥100时,在相同Re下,随着振幅增大,综合性能也提高。模型截面宽度2.5mm、截面高度5mm、振幅2mm、正弦波长30mm时具有最佳的综合性能。

Numerical Simulation of a New Type of Sine Channel of Plate-fin Heat Exchanger

The performance of heat-transfer in the periodic sine channel of laminar flow was studied by numerical simulation to obtain the effect of the corrugated inclination structure size, amplitude, wavelength of periodic sine channel on the combination property. It was found that with the increase of the breadth, the performance of heat transfer combination property de- creased, and the effect of wavelength was reversed. The effect of the cross-section height dis- played irregular, and when the corrugated inclination h ： 5 mm the heat transfer combination property was the best. On the condition of different Reynolds number, the effect of amplitude was different, and when the corrugated inclination Re： 50 the heat transfer combination property decreased with the amplitude increasing, else when the corrugated inclination Re≥100 the effect of amplitude was reversed. The model of breadth b： 2.5 mm, corrugated inclination h = 5 mm, amplitude a= 2 mm and wavelength l： 30 mm had the best combination property.