收稿日期: 2015-03-13
修回日期: 2015-07-07
网络出版日期: 2016-03-15
基金资助
中国博士后科学基金(2014M552441)、国家自然科学基金(51125027) 和陕西省科技统筹创新工程计划 (2013KTCG01-06)资助
Experimental investigation of influences of primary nozzle exit position on ejector performance
Received date: 2015-03-13
Revised date: 2015-07-07
Online published: 2016-03-15
陈伟雄 , 陈会强 , 石朝胤 , 王迎春 , 种道彤 , 严俊杰 . 喉嘴距对喷射器性能影响的实验研究[J]. 中国科学院大学学报, 2016 , 33(2) : 253 -257 . DOI: 10.7523/j.issn.2095-6134.2016.02.017
The primary nozzle exit position (NXP) is one of the important geometrical factors affecting the ejector performance. In the present study, the ejector performance was investigated experimentally for getting the changing rules of the ejector performance with different NXPs and working conditions. The results show that the NXP has little influence on the critical pressure, but has obvious influence on entrainment ratio. The entrainment ratio first increases and then decreases with NXP. Both the two-phase and single-phase ejectors have their respective optimum NXPs. The optimum NXP increases with the water mass flowrate of the low-pressure fluent. The optimum NXP is 2.8 mm in single-phase operation while it becomes 3.6 mm when the water mass flowrate of the low-pressure fluent is 0.07 kg/min.
Key words： ejector; NXP; entrainment ratio; critical back pressure
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