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针对因机械泵驱动两相流体回路(MPTL)特有的流量漂移现象导致的系统流量降低,使蒸发器出现蒸干的危险等问题,用实验对一定热负荷功率和初始流量下流量漂移现象进行了研究。设计了实验装置,选择初始流量和热负荷功率为实验因素,在不同初始流量和热负载功率的水平下,通过测量热负荷开始加载时至系统达到热平衡后的流量变化,并结合流量漂移过程各实验参数变化曲线,研究了泵驱动两相流体回路的流量漂移,进行了流量漂移实验,分析了实验因素对流量漂移的影响、流量漂移量与系统运行参数的关系,以及流量漂移中流型的变化。结果表明:在一定的热负荷功率下,初始流量越小,归一化流量漂移量越大;在一定的初始流量下,热负荷功率越大,归一化流量漂移量越大。实验还给出了流量漂移量与蒸发器出口含气率正相关的曲线,表明流量漂移量与系统阻力呈高度线性关系,并证明了流量漂移过程中系统管路中出现的流型变化。
In view of the problems of the system flow drop due to the phenomenon of flow drifting caused by the mechanical pump driven two-phase fluid circuit (MPTL) and the risk of the evaporator being evaporated to dryness, the phenomenon that the flow rate drifts under a certain thermal load power and the initial flow rate the study. The experimental device was designed and the initial flow rate and thermal load power were selected as experimental factors. The flow rate changes from the time when the thermal load starts to the time when the system reaches the thermal equilibrium under different initial flow rates and thermal load power levels, The experimental results show that the experimental results show that the drift of pump-driven two-phase fluid circuit is high, and the drift of pump-driven two-phase fluid circuit is studied. The experimental results show that the influence of experimental factors on the flow drift, the relationship between flow drift and system operating parameters, . The results show that under a certain thermal load power, the smaller the initial flow rate, the larger the normalized flux drift. At a certain initial flow rate, the larger the thermal load power, the larger the normalized flux drift. The experiment also gives a positive correlation between the flux drift and the evaporator outlet gas flow rate. It shows that the flow drift is highly linear with the system resistance, and the flow pattern change in the system pipeline during the flow drift is proved.