太阳能喷射式制冷系统喷射器性能的三维数值模拟

Numerical Simulation for the Ejector of Solar Ejector Refrigeration System

中文关键词: 太阳能  蒸汽喷射器  数值模拟  流线型

英文关键词: Solar  Steam ejector  Numerical simulation  Streamline

中文摘要:

      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。

英文摘要:

      Numerical simulation using FLUENT software for the ejector of solar ejector refrigeration system is carried out, in terms of the main operating parameters, the main dimensions and the structure affecting the performance of the ejector. The results of numerical simulation study: the ejector of streamlined configuration can reduce backflow phenomenon; continuing to increase of the pressure of the working fluid over a certain value does not improve the performance of the ejector; the a certain distance of nozzle outlet and diffuser tube inlet will improve the performance of the ejector; the performance of ejector of contraction section with streamline is very close to the ejector of four sections, and they both can improve ejector performance.