低密度伴随湍流流场的仿真研究  

A Study of Imitation on Flow Field of Low-Density Concomitancy Turbulence

作　　者：刘坤[1] 朱苗勇[1] 王滢冰[2] 毕晓夫[2] 

机构地区：[1]东北大学材料与冶金学院,沈阳1100042 [2]辽宁科技大学材料学院,鞍山114044

出　　处：《特殊钢》2008年第1期10-12,共3页Special Steel

基　　金：国家自然基金(50574007)

摘　　要：借助商业软件Fluent,采用数值模拟的方法,分析了副孔压力0.12～0.20 MPa时中心射流轴线上速度分布,副孔压力和环境温度(300～2000 K)对射流横截面速度分布的影响,以及环境温度对中心射流轴线上速度衰减规律的影响。结果表明,中心射流在高温低密度伴随流保护下,可显著减少对周围介质的卷吸量,更大程度减缓轴线上速度衰减,使核心区长度明显增加。The velocity distribution of centre axis jet flow with sub-hole pressure 0. 12 - 0. 20 MPa, the effect of subhole pressure and ambient temperature （ 300 - 2 000 K） on velocity distribution of jet cross section, and the effect of ambient temperature on rule of velocity attenuation at centre axis jet have been analyzed by commercial software Fluent and using numerical simulation method. Results showed that the amount of entrapped and absorbed ambient medium could obviously decreased as centre jet flow was protected by high temperature and low-density concomitancy flow and the attenuation of velocity of centre axis jet flow was slowed down to markedly increase the length of core zone.

关 键 词：数值模拟 低密度伴随 湍流射流 

分 类 号：TB126[理学—工程力学]