南京师范大学学报：工程技术版2012，Vol.12Issue(1)：29-32,4.
花瓣喷嘴引射器引射系数的数值分析
Numerical Simulation of Entrainment Ratio of Steam Ejector with Petaliform Nozzle
张奕 1陈丹丹 1石嵩1
作者信息
- 1. 南京师范大学能源与机械工程学院,江苏南京210042
- 折叠
摘要
Abstract
Steam ejector with petaliform nozzle can provide flare gas burner with air.Entrainment ratio is the most important operating parameter of the ejector.Compressible fluid conservation equations of momentum,energy and species are used to compute flow process in the ejector.It is found that the ejector achieves a maximum entrainment ratio when it operates at an optimal primary steam flow.Shock wave appears at exit of petaliform nozzle when steam flow is too large,which leads to the decrease of the entrainment ratio.When the nozzle exit position（NXP） is located in mixture room,the ejector gains a greater entrainment ratio than out of mixture room.The farther NXP from mixture room is,the less the entrainment ratio is.When a converging-diverging tube is connected to the mixture room,the entrainment ratio is as 1.5 times large as that connected to a straight tube.The results can be useful for the choice of the operating parameters and design of steam ejector with petaliform nozzle.关键词
引射器/引射系数/花瓣喷嘴/数值计算Key words
steam ejector/entrainment ratio/petaliform nozzle/numerical simulation分类
能源与动力引用本文复制引用
张奕,陈丹丹,石嵩..花瓣喷嘴引射器引射系数的数值分析[J].南京师范大学学报：工程技术版,2012,12(1):29-32,4.
