波瓣混合器混合流场中涡结构的数值研究  

Numerical Investigation of Vortical Structures in a Jet Mixing Flow of Lobed Mixer

作　　者：谢翌[1] 李腾[1] 刘友宏[1] 

机构地区：[1]北京航空航天大学能源与动力工程学院,航空发动机气动热力国家级重点实验室,北京100191

出　　处：《科学技术与工程》2011年第32期7972-7978,共7页Science Technology and Engineering

摘　　要：以FLUENT程序为研究平台,分别采用标准k-ε、RNG k-ε、Realizable k-ε、SST k-ω以及S-A五种湍流模型,对航空发动机混合排气系统中常用的波瓣混合器的流场,进行了三维数值模拟。与实验测量数据对比可知,所采用的计算方法能够较好地描述波瓣混合器复杂流场中流向涡、正交涡形状以及涡量沿流动方向的变化规律。在各种湍流模型中,Realizable k-ε在流向涡以及正交涡涡量大小的描述方面较其他模型更为精确。A three-dimensional numerical investigation on flow field of lobed mixer which is usually used in exhausting system of turbofan engine was carried,on the basement of FLUENT.Standard k-ε,RNG k-ε,Realizable k-ε,SST k-ω and S-A turbulent models were applied for the simulation.According to contrast between experiment results and numerical simulation results,the computational method is able to describe development of shape and value of streamwise vortices and spanwise vortices.Besides,Realizable k-ε turbulent model has better accuracy than other models in describing maximum value of streamwise vortices and spanwise vortices.

关 键 词：波瓣混合器 数值研究 湍流模型 流向涡 正交涡 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]