化工学报 ›› 2009, Vol. 60 ›› Issue (6): 1398-1401.

• 传递现象 • 上一篇    下一篇

喷嘴可调式喷射器性能的实验研究

沈胜强;张琨;刘佳;杨勇   

  1. 大连理工大学海洋能源利用与节能教育部重点实验室
  • 出版日期:2009-06-05 发布日期:2009-06-05

Experimental invtestigation on performance of adjustable ejector

SHEN Shengqiang;ZHANG Kun;LIU Jia;YANG Yong   

  • Online:2009-06-05 Published:2009-06-05

摘要: 海水淡化系统中,负荷的变化要求热力蒸汽压缩器(Thermal Vapour Compressor)的流量也随之改变,但要求TVC的出口压力尽量不随之改变。因为系统的正常运行对出口压力对应的饱和温度很敏感,如果饱和温度过高,会导致系统内部结构腐蚀严重,降低使用寿命,甚至危害整个系统的正常运行。引入可调式喷射器,对其性能进行实验研究,测量并分析了喷针在不同位置时,可调式喷射器的压力、流量和喷射系数的变化。结果显示,在需要改变流量的时候可以保持喷射器出口压力基本不变。

关键词: 喷射器, 调节锥, 喷射系数, 喷嘴

Abstract:

An adjustable ejector with a spindle in the nozzle was developed for a wider adjustment rangeAn experimental study was carried out on the performance of the adjustable ejectorTo change the spindle position axially the nozzle throat sectional area could be changedThe ejector flow parameters,such as flow rate,pressure and entrainment ratio,at different spindle positions were measuredThe results showed that the adjustable ejector could be used in a wider range of fluid flow rateWhen the throat area was reduced,the ultimate discharge pressure would be lower but the entrainment ratio would increase greatly.

Key words: 喷射器, 调节锥, 喷射系数, 喷嘴