| Summary: | 碩士 === 國立中興大學 === 機械工程學系 === 94 === Abstract
In this study, a computational fluid dynamics (CFD) code of ESI CFDRC was used to calculate the three-dimensional, incompressible, impinging single-jet turbulence flow field in order to understand the mixing effects and flow behavior. The Staggered Grid System, Hybrid Scheme and SIMPLEST algorithm were employed in this numerical simulation. The Lam & Bremhorst k-e two-equation turbulence model was used in present study. The parameters of inlet of velocity and the different injection angle are employed to analyze the effected pressure, velocity, temperature and structure in the flow field for fixed cross-section.
The calculated results have shown that the mixing effect was better when the impinging angle between upper and down nozzle as 180°. The mixing effect was better when the impinging speed change from high ((V=50 m/s 、V=75 m/s) to lower (V=10 m/s). The present results can also provide the reference for the design of mixer or burner in the industry.
Keywords: single jet, impinging flow, three-dimensional flow field, hybrid effect.
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