仪器设备间距对空间实验室机柜内部流动和传热的影响分析

Influence Analysis of the Spacing among the Apparatus and Equipments on the Flow and Heat Transfer inside the Spacelab Racks

为充分利用机柜内有限空间并改善仪器设备的散热环境,建立了空间实验室机柜的模型,运用数值计算方法,对不同仪器设备间距下机柜内流场和温度场进行求解,研究了不同布局仪器层平均风速和仪器表面平均对流换热系数的变化规律。结果表明,合理地选择仪器设备间距可以有效地改善其表面的散热状况,为空间实验室机柜的热设计提供了依据。

In order to make the best of the limited space in the rack to improve the heat dissipation environments of the apparatus, an analytical model of the spacelab rack was established. And by using numerical methods, the flow fields and the temperature fields inside the rack under diverse spacing of the apparatus were received. The average flow velocity and average convective heat exchange coefficient were also studied. The heat dissipation characteristics can be improved effectively by designing the spacing of the apparatus in suitable range, and this can provide the references to thermal design of racks mounted in spacelab.