Study of Spiral Flow Generated through an Annular Slit  

作　　者：Tae Hun KIM Shigeru MATSUO Toshiaki SETOGUCHI Heuy-Dong KIM 

机构地区：[1]Graduate school of Science and Technology Saga University,1,Honjo-machi,Saga shi,Saga 840-8502,Japan,Department of Mechanical Engineering Saga University,1,Honjo-machi,Saga shi,Saga 840-8502,Japan,Department of Mechanical Engineering Saga University,1,Honjo-machi,Saga shi,Saga 840-8502,Japan,School of Mechanical Engineering College of Natural Science,Andong National University,388,Song Cheon Dong,Andong,Kyung Pook,Korea

出　　处：《Journal of Thermal Science》2005年第2期97-102,共6页热科学学报（英文版）

摘　　要：The effect of pressurized air inlets in the reservoir upstream of the annular slit on characteristics of the axial and tangential velocity components is investigated numerically, and the mechanism of occurrence of spiral nozzle flow is clarified. In simulations, Unified Platform for Aerospace Computational Simulation (UPACS) is used. The governing equations under consideration are the unsteady compressible Navier - Stokes. A second-order finite volume scheme with MUSCL (Roe scheme) is used to discretize the spatial derivatives, and a second order-central difference scheme for the viscous terms, and a MFGS (Matrix Free Gauss Seidel) is employed for time integration. Spalart-Allmaras model was used as a turbulence model. The results obtained are compared with velocity distributions in the experiment measured by the two-component fiber optic laser Doppler velocimeter system. The existence of discrete pressurized air inlets that leads to the occurrence of asymmetrical characteristics is a very important factor for the formation of spiral flow.

关 键 词：spiral nozzle flow Coanda effect convergent nozzle annular slit simulation. 

分 类 号：TB126[理学—工程力学]