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http://dx.doi.org/10.9726/kspse.2018.22.1.011

Numerical Analysis on the Internal Flow Field Characteristics of Wind Tunnel Contractions with Morel's Equation  

Kim, Jang-Kweon (Dept. of Power System Engineering, Kunsan National University)
Oh, Seok-Hyung (School of Mechanical Engineering, Kunsan National University)
Publication Information
Journal of Power System Engineering / v.22, no.1, 2018 , pp. 11-17 More about this Journal
Abstract
The steady-state, incompressible and three-dimensional numerical analysis was carried out to evaluate the internal flow fields characteristics of wind tunnel contractions made by Morel's curve equations. The turbulence model used in this study is a realizable ${\kappa}-{\varepsilon}$ well known to be excellent for predicting the performance of the flow separation and recirculation flow as well as the boundary layer with rotation and strong back pressure gradient. As a results, when the flow passes through the interior space of the analytical models, the flow resistance at the inlet of the plenum chamber is the largest at $Z_m=300$, 400 mm, but the smallest at $Z_m=700mm$. The maximum turbulence intensity in the test section is about 2.5% when calculated by the homogeneous flow, so it is improved by about 75% compared to the 10% turbulence intensity at the inlet of the plenum chamber due to the contraction.
Keywords
Boundary Layer Thickness; Contraction; Morel's Equation; Subsonic Wind Tunnel;
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