【摘要】 针对部分重力辅助两相流体自然循环系统构建了数值仿真模型,对不同运控条件下的月面部分重力场(g/6)和地面常重力场(1g)的嫦娥三号月球车两相流体自然循环系统稳态性能进行了数值仿真研究。数值仿真结果表明,地面重力场模拟系统能够真实反映月面重力场应用系统的性能;对于月面部分重力场中的两相流体自然循环系统,随着系统压力的增加,绝大多数工况下系统阻力减小,但在环境温度较高时,系统特性参数对系统阻力存在双值现象,可能存在系统不稳定现象,引起系统波动,甚至传热恶化。更多还原

【Abstract】 A numerical simulation model for the heat transfer in the closed two-phase natural circulation system driven by partial gravity was established.The simulations of steady operation characteristics of the two-phase loop designed for the Chinese lunar exploration spacecraft Chang’E-3 in lunar gravity(g /6) and of a ground-based simulator in normal gravity(1g) showed a satisfied agreement,indicating that the ground-based simulator in normal gravity may be used to successfully simulate the characteristics of the practical two-phase loop in lunar gravity.The simulations of the practical two-phase loop in lunar gravity reveal that the system resistance usually decreases monotonously with the increase of the system pressure,except the case of high ambient temperature where a dualvalue dependences of the system characteristic parameters on the system resistance will appear,indicating some possible instability of the two-phase loop,even deterioration of heat transfer.更多还原