毛细泵环路系统运行特性的数值研究

An Integrated Model for Dynamic Behavior of CPL

给出了描述毛细泵环路(CPL)系统运行特性的非稳态模型,并运用该模型模拟了系统的启动过程,考察了储液罐中温度波动以及蒸发器上热负荷的突然改变对系统稳定性的影响;从数值模拟的角度更好地预测和分析CPL系统运行的过程和特点,该模型的数值结果与实验现象和实验数据相比有较好的一致性。通过该模型还可以进一步揭示CPL系统运行过程中启动困难、储液罐温度不能波动过大以及热流密度突然改变引起系统失效等内在原因,为设计出性能优良的CPL系统提供了理论依据。

A transient model of a CPL has been developed to predict the thermal and dynamic behavior. This model comprises two coupled modules, the thermal module and the hydrodynamic module. The objective of this numerical model is to study the mechanisms of the unstable behavior during the cyclical functioning of the CPL. The simulative processes include the start-up, the temperature oscillations in the reservoir and the heat load change in the evaporator. The numerical results agree with the experimental data. Moreover, this model is used to explain the reason that the start-up becomes a failure easily, the abrupt change of the heat load can lead to the evaporator deprime. It also can reveal that the temperature oscillations in the reservoir are disadvantageous to the operation of CPL.