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3股互击式喷注器混合特性的数值模拟
引用本文:靳冬欢,刘文广,陆启生. 3股互击式喷注器混合特性的数值模拟[J]. 激光技术, 2011, 35(2): 230-233,263. DOI: 10.3969/j.issn.1001-3806.2011.02.024
作者姓名:靳冬欢  刘文广  陆启生
作者单位:1.国防科学技术大学光电科学与工程学院, 长沙, 410073
摘    要:为了获得更好的混合效果,将3股互击式喷注器中间的喷注孔与两侧的喷注孔进行异型设计,改为直孔与锥形孔的组合,得到两种新型结构的3股互击式喷注器.应用计算流体力学方法,在"燃料-氧化剂-燃料"组合条件下,对上述两种结构及全直孔式喷注器的流场进行了3维的数值模拟.互击式喷注器主要通过横向旋涡驱动来实现快速混合;氧化剂喷注采用...

关 键 词:激光器  3股互击式喷注器  数值模拟  未混合度  直孔  锥形孔
收稿时间:2010-06-08

Numerical study of mixing characteristics of triplet impingement injectors
JIN Dong-huan,LIU Wen-guang,LU Qi-sheng. Numerical study of mixing characteristics of triplet impingement injectors[J]. Laser Technology, 2011, 35(2): 230-233,263. DOI: 10.3969/j.issn.1001-3806.2011.02.024
Authors:JIN Dong-huan  LIU Wen-guang  LU Qi-sheng
Abstract:In order to enhance mixing effect,two novel styles of triplet impingement injectors were presented by changing middle jet orifice or the other two jet orifices into cone-shaped orifices.Flow field characteristics of above-mentioned two kinds of injectors and traditional injectors with triple straight-wall jet orifices under conditions of fuel-oxidizer-fuel triplet arrangement were analyzed based on 3-D computational fluid dynamic methods.The numerical simulation results demonstrate that mixing of triplet impingement injectors is principally accelerated by transverse vortices.For the injector with cone-shaped oxidizer jet orifice,the vertex intensity of flow field is lower than that of the injector with triple straight-wall jet orifices.For the injector with cone-shaped fuel jet orifices,there is a definite increase of the vertex intensity of flow field.Mass-weighted average unmixedness was introduced to evaluate the mixing performances of three kinds of injectors.It is indicated that the mixing effect of injector with cone-shaped fuel jet orifices is better than that of injector with triple straight-wall jet orifices and the injector with cone-shaped oxidizer jet orifice is the worst of three.For injector design of chemical laser combustors,oxidizer and fuel jet orifices adopt different styles,for example,the injector with cone-shaped fuel jet orifices,which helps improve mixing effect of oxidizer flow and fuel flow further.
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