Local turbulent convective heat transfer from a flat plate to a circular impinging air jet is numerically investigated. The jet-to-plate distance (L/D) effect on local heat transfer is the main focus of this study. The eddy viscosity V2F turbulence model is used with a non-uniform structured mesh. Reynolds-Averaged Navier-Stokes equations (RANS) and the energy equation are solved for axisymmetric, three-dimensional flow. The numerical solutions obtained are compared with published experimental data. Four jet-to-plate distances, (L/D = 2, 4, 6 and 10) and seven Reynolds numbers (Re= 7,000, 15,000, 23,000, 50,000, 70,000, 100,000 and 120,000) were parametrically studied. Local and average heat transfer results are analyzed and correlated with Reynolds number and the jet-to-plate distance. Results show that the numerical solutions matched experimental data best at low jet-to-plate distances and lower Reynolds numbers, decreasing in ability to accurately predict the heat transfer as jet-to-plate distance and Reynolds number was increased.
展开▼
机译：数值研究了从平板到圆形撞击空气射流的局部湍流对流换热。射流到板的距离（L / D）对局部传热的影响是本研究的主要重点。涡流粘度V2F湍流模型与非均匀结构的网格一起使用。求解轴对称三维流的雷诺平均Navier-Stokes方程（RANS）和能量方程。将获得的数值解与已发布的实验数据进行比较。在参数上研究了四个射流到板的距离（L / D = 2、4、6和10）和七个雷诺数（Re = 7,000、15,000、23,000、50,000、70,000、100,000和120,000）。分析局部和平均传热结果，并将其与雷诺数和射流到板的距离相关。结果表明，数值解与实验数据在低射流板距和较低雷诺数下最匹配，随着射流板距和雷诺数的增加，准确预测传热能力降低。
展开▼
