Numerical Study on the Flow Characteristics of 2-D Free Jet at a Low Reynolds Number

4th International Conference on Mechanical and Aeronautical Engineering

机械制造;航空航天工程

Shin, B.^1 ; Tashiro, S.^2

Department of Mechanical Design Systems Engineering, University of Miyazaki, Miyazaki

889-2192, Japan^1

Graduate School of Engineering, University of Miyazaki, Miyazaki

889-2192, Japan^2

关键词: Axial velocity;    Developed regions;    Flow charac-teristics;    Incompressible Navier Stokes equations;    Laminar flow regimes;    Low Reynolds number;    Numerical solution;    Self-similarities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/491/1/012025/pdf
DOI  :  10.1088/1757-899X/491/1/012025

学科分类：航空航天科学

来源: IOP

【 摘 要 】

Two-dimensional free jets have been numerically studied in the laminar flow regime. The numerical solution was obtained by solving the incompressible Navier-Stokes equations with SMAC finite-difference method. The variation of the axial velocity, potential core and jet spreading width were investigated to make clear the characteristics of free jet at a low Reynolds number. It was found that the fully developed region where the self-similarity is satisfied exists in the downstream of the collapsing point of the potential core. The variation of the core is depended on the Reynolds number. It showed that the half-width of geometry is useful in identifying the similarity. The predicted velocity distributions were in good agreement with those of experimental and theoretical results.