摘要
介绍了基于BGK方程(Bhatnagar-Gross-Krook)的气体动理学格式(Gas Kinetic Scheme,GKS)数值算法。给出了自由射流的物理模型以及不同边界的处理方式,同时进行了网格无关性验证。通过运用气体动理学格式对自由射流进行数值模拟得到了射流流场及流线特征,同时得到中心轴线速度衰减规律,不同截面无量纲流向速度的相似性,满足自由射流的规律。气体动理学格式得到的射流速度场,不同截面无量纲流向速度等与N-S方程的模拟结果基本相同,说明气体动理学格式可用于自由射流问题的数值模拟。
This paper describes the Gas-Kinetic Scheme based on the BGK-Shakhov equation.The physical model of the free jet and different boundary processing methods are given,and the grid independence verification is carried out.The flow field and streamline characteristics are obtained by numerical simulation of free jet using the gas kinetic scheme.At the same time,the center-line stream-wise velocity attenuation law and the similarity of the non-dimensional stream-wise velocity of different stations are obtained,which satisfies the law of free jet.The jet velocity field obtains by the gas kinetic scheme and the non-dimensional stream-wise velocity of different sections are basically the same as those of the N-S equation,indicating that the gas kinetic scheme can be used for numerical simulation of the free jet problem.
作者
谢晴
郭晓亮
谢军龙
王志强
XIE Qing;GUO Xiao-Liang;XIE Jun-Long;WANG Zhi-Qiang(School of Energy and Power Engineering, HucLzhong University of Science and Technology, Wuhan 430074, China;Green Fan Manufacturing Collaborative Innovation Center in Hubei Province, Wuhan 430074, China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2019年第7期1498-1502,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51376077)