摘要
利用二维轴对称,真实气体模型对喷射式制冷空调系统的喷射器进行CFD计算。利用CFD模型进行计算,得到了喷射器在不同冷凝条件下性能变化及其系统的COP变化。在喷射器结构确定,凝温度要在一定范围:20℃≤tc≤40℃,喷射器正常工作。当冷凝压力低于临界压力时,喷射器的性能表现出恒能力特性。利用CFD技术研究得到冷凝温度的变化引起沿喷射器轴线的静压和马赫数的变化及混合室入口的静压的变化,进而进一步引起喷射器性能的变化。
The 2D axisymmetric,real gas model was developed to calculate the ejector in the ejector cooling system.The ejector performance and the system COP at different conditions was calculated with the CFD model,and the performance curves on different condenser conditions were obtained.When the ejector structure was given,there was a range： 20℃≤tc≤40℃;and when the condenser temperature（tc） located in the range,the ejector and the system could operate naturally.When the condenser pressure was lower than the critical pressure,ejector showed constant performance characteristic.The change of condenser temperature would lead to the change of the static pressure and the mach number on the ejector axis and the static pressure of mixing chamber.And as the result,the ejector performance would change.
出处
《低温与超导》
CAS
CSCD
北大核心
2011年第1期51-53,58,共4页
Cryogenics and Superconductivity
基金
上海市优秀青年基金(ssc09010)
上海市教育委员会重点学科建设项目(J50704)
关键词
喷射器
喷射系数
CFD模拟
空调
Ejector
Entrainment ratio
CFD simulation
Air conditioner
