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利用FLUENT软件对太阳能喷射式制冷系统中的喷射器进行三维数值模拟,从影响喷射器性能的主要工作参数和喷射器的主要尺寸、结构等方面进行了数值计算。从数值模拟的研究中得出:流线型结构的喷射器能减弱混合过程中的回流现象;在超过某一值时继续增加工作流体的压力对喷射器性能没有改善;喷嘴出口和扩压管入口存在一定的距离会提高喷射器的性能;收缩段采用流线型的喷射器性能很接近四段都采用流线型的喷射器的性能,并且都能提高喷射器的性能。
FLUENT software is used to simulate the ejector in the solar ejector refrigeration system. The main parameters of the ejector and the main dimensions and structure of the ejector are numerically calculated. From the numerical simulation, it is concluded that the streamlined injector can reduce the backflow in the mixing process. If the pressure exceeds a certain value, the pressure of the working fluid will not increase and the ejector performance will not be improved. The outlet of the nozzle and the inlet of the diffuser A certain distance will improve the performance of the ejector; the use of streamlined ejector performance in the contraction section is very close to the performance of streamlined ejectors in all four sections, and both improve ejector performance.