化工学报2016，Vol.67Issue(z2)：78-86,9.DOI:10.11949/j.issn.0438-1157.20161379
内部不可逆损失对喷射器性能影响理论分析
Theoretical analysis on impact of irreversibility on ejector performance
摘要
Abstract
Ejector is the key component of ejector refrigeration system.Its performance is directly of relevance to the system efficiency.In the present work,a new theoretical model is proposed to analyze the impact of internal irreversibility of the ejector on its performance,including entrainment ratio,ejector efficiency and ejector back pressure.In the proposed model,real gas characteristic is used,and the existence of two phases is also considered for the prediction of ejector performance.Results show that the irreversibility of primary flow through the converging-diverging nozzle and the irreversibility of secondary flow expansion in suction chamber have great impact on entrainment ratio,the irreversibility of mixed flow in mixing chamber and diffuser almost has little influence on the entrainment ratio.And with the decrease of the internal irreversibility in each part of the ejector,ejector efficiency increases and the ejector back pressure increases as well.关键词
喷射器性能/不可逆损失/实际气体/效率系数Key words
ejector performance/irreversibility/real gas/efficiency coefficient分类
通用工业技术引用本文复制引用
戴征舒,陈光明,张华..内部不可逆损失对喷射器性能影响理论分析[J].化工学报,2016,67(z2):78-86,9.基金项目
国家重点基础研究发展计划项目(2010CB227304) （2010CB227304）
国家自然科学基金重大资助项目(50890184) （50890184）
上海高校青年教师培养资助计划项目(10-16-301-801)。@@@@supported by the National Basic Research Program of China (2010CB227304), the National Natural Science Foundation of China (5089184)and the Shanghai Col eges and Universities Young Teachers Training Funding Scheme (10-16-301-801) （10-16-301-801）
