CPL微泵引射辅助回路的数值研究

Numerical study of the accessorial loop with a micro-pump and ejector for the capillary pumped loop

在毛细相变流体回路(CPL)系统中加入微泵引射辅助回路,以提高其传热能力,并建立一个三维模型来分析引射器的工作性能.数值结果表明:主回路不但能正常运行,而且辅助回路能够提高主回路流体的质量流量;但在引射器的出口中包含气相,这些气体能够流入蒸发器,对整个系统都会造成不利影响.因此在引入微泵引射辅助回路的同时必须在引射器出口和蒸发器入口段之间加入过冷器,使得引射器出口中的气相冷凝成液体进入蒸发器,保证蒸发器的正常工作.

An accessorial loop with a micro pump and ejector was applied into the capillary pumped loop（CPL） to enhance the heat transfer capability of CPL. A 3D model was developed to investigate the operation performance of the ejector. The numerical results show that the primary loop will not only can operate normally but the mass flux can be enhanced with an accessorial loop. However, vapor can be found in the outlet of the ejector and it can flow into the evaporator, which is a big disadvantage for system, hence, a sub cooler is necessary to locate between the outlet of the ejector and the inlet of the evaporator to condense the mixed fluid into liquid.