| Study of Spiral Flow Generated through an Annular Slit |
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| 作者姓名： | Tae Hun KIM Shigeru MATSUO Toshiaki SETOGUCHI Heuy-Dong KIM |
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| 作者单位： | 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 |
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| 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.
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| 关 键 词： | 旋转喷嘴流 柯恩达效应 渐缩喷嘴 环形裂缝 计算机仿真 |
| 收稿时间： | 20 March 2005 |
Study of spiral flow generated through an annular slit |
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| Tae Hun KIM,Shigeru MATSUO,Toshiaki SETOGUCHI,Heuy-Dong KIM.Study of Spiral Flow Generated through an Annular Slit[J].Journal of Thermal Science,2005,14(2):97-102. |
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| Authors: | Tae Hun Kim Shigeru Matsuo Toshiaki Setoguchi Heuy-Dong Kim |
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| Affiliation: | (1) Graduate school of Science and Technology, Saga University, 1, Honjo-machi, Saga shi, 840-8502 Saga, Japan;(2) Department of Mechanical Engineering, Saga University, 1, Honjo-machi, Saga shi, 840-8502 Saga, Japan;(3) School of Mechanical Engineering, College of Natural Science, Andong National University, 388, Song Cheon Dong, Andong, Kyung Pook, Korea |
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| Abstract: | 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. |
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| Keywords: | spiral nozzle flow Coanda effect convergent nozzle annular slit simulation |
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