Thermal modeling of high-power satellite power cable and analysis of bundling thermal effect

卫星大功率电缆束温度场建模分析及捆扎热效应研究

Received: 1 February 2023

Abstract

With the increase of satellite power, the current-carrying and heat dissipation of power cable is increasing significantly and the thermal safety problem becomes prominent. Therefore, the need for accurate modeling and fine design of power cable becomes increasingly urgent. In this paper, the thermal analysis modeling method for high-power cable bundle is proposed based on ground test data, and the heat transfer parameters at the installation and bundling points are obtained. At the same time, the thermal effect of cable bundling is quantitatively analyzed by simulating the splitting and binding power cable bundle. The result indicates that enhancing the radiation heat transfer between cables and the surrounding environment is the most effective means to improve the heat dissipation condition of cable bundles. The thermal model of high-power satellite power cable proposed in this paper can be used as an important basis for the prediction of on-orbit temperature and fine laying design of the power cable.

摘要

随着卫星功率的提高, 星上功率电缆载流量和热耗水平大幅增加, 热安全性问题凸显, 功率电缆精准建模和精细化设计的需求日趋迫切。基于地面试验数据提出了卫星大功率电缆束的热分析建模方法, 并给出了电缆安装固定处和捆扎处换热参数的经验值和试验标定值; 通过模拟电缆分束和合束捆扎的温度场定量分析了电缆束捆扎的热效应, 明确了增强电缆与周边环境的辐射换热是改善电缆束散热条件最有效的手段。文中建立的卫星大功率电缆束热模型可作为星上功率电缆在轨温度预示和精细化敷设设计的重要基础。