国防科技大学学报2011，Vol.33Issue(1)：39-43,5.
化学激光器环形与线形分流管道对比的数值分析
Numerical Investigation of Comparing Annular with Linear Distribution Flow Pipeline in Chemical Laser
靳冬欢 1刘文广 1陈星 1陆启生 1赵伊君1
作者信息
- 1. 国防科技大学,光电科学与工程学院,湖南,长沙,410073
- 折叠
摘要
Abstract
Distribution flow pipeline used in cylindrical chemical laser is composed of an annular general pipeline and a limited quantity of branch pipelines that are connected with the inner or outer circular arc of general pipeline. Its structure and flow field characteristics differ from thooe of linear distribution flow pipeline used in conventional chemical laser. Flow field characteristics of above-mentioned three kinds of distribution flow pipelines were analyzed contrastively based on three-dimension computational fluid dynamics methods. The numerical simulation results clemonstrate that total pressuue of general pipeline in linear distribution flow pipeline is higher than that in outer-circular-arc annular pipeline, but lower than that in inner-circular-arc annular pipeline. Both distribution flows of branch pipelines and secondary flows produced in annular general pipeline can excite radial velocity on the section plane of general pipeline. These phenomena enable the ges flow of general pipeline to have remarkable three-dimension characteristics. Mass flow rates of branch pipeline outlets are higher and higher along the direction of main gas flow movement. Its trend is contrary to upward tendency cf total pressure in general pipeline, but is similar to downward tendency of static pressure in general pipeline. By comparison,Mass flow rate fluctuating amplitude of branch pipeline outlets in outer-circular-arc annular distribution flow pipeline is amaller than that in linear distribution flow pipeline, and the amplitude in inner-circular-arc annular distribution flow pipeline is the biggest of the three.As a result, outer-circular-arc annular distribution flow pipeline is of advantage among the three methods in distributing uniformly gas flow, while inner-circular-arc annular pipeline is the lowest and the linear distribution flow pipeline gees between the other two.关键词
化学激光器/分流/数值模拟/线形管道/环形管道Key words
chemical laser/ distribution flow/ numerical simulation/ linear pipeline/ annular pipeline分类
信息技术与安全科学引用本文复制引用
靳冬欢,刘文广,陈星,陆启生,赵伊君..化学激光器环形与线形分流管道对比的数值分析[J].国防科技大学学报,2011,33(1):39-43,5.
