平面に垂直に衝突する二次元乱流噴流の流れ特性の計算

概要

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A two-dimensional turbulent jet flow developed fully and impinged vertically on a flat wall is analysed numerically by using the K-ε turbulence model and assuming the complete turbulent flow outside the viscous sublayer on the wall, and the flow characteristics of an impinging jet in the impingement region are obtained. Results are summarized as follows; (1) Distributions of stream line, vorticity, velocity, turbulence energy and its dissipation rate of the impinging jet are computed in the impingement region. (2) Velocity components along the centeraxis of jet flow and the wall direction in the impingement region show a good agreement with the measurements. (3) Turbulence energy calculated on the centeraxis of jet flow agree with the measured values except the stagnation region. The distributions of turbulence energy on parallel and normal sections to the wall surface also show a reasonable agreement with the experimental results.
東海大学の論文