基于非结构网格的黏性流场大涡模拟(黄振宇; 韦喜忠; 洪方文)

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【作者】黄振宇; 韦喜忠; 洪方文 【作者单位】中国船舶科学研究中心水利论文1eT:M&b k6GDQ

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v+~*I[p8K0【论文摘要】 采用非结构网格上的有限体积法对 P4119螺旋桨及15°攻角下的 NACA0012翼形周围的黏性流场进行大涡模拟,在加权最小二乘法重构流动物理量梯度的基础,由三阶精度的 UMUSCL(Unstructured Monotonic Upstream-centered Schemes for Conversation Law)插值方法和方向导数法离散控制方程的对流项和亚格子应力项,计算得到的螺旋桨定常水动力性能、叶片表面压力与试验吻合较好,同时给出大攻角机翼复杂绕流的瞬变过程。水利论文6j mmS T9g;TL3wHT

V r2p9~%rl#eD0【英文论文摘要】 The cell-centered finite volume method(FVM)on unstructured meshes is applied to the large eddy simulation(LES)of viscous fiowfield.Based on gradient reconstruction by the weighted least square method,the inviscid fluxes are interpolated by a third-order unstructured MUCSL-scheme and the viscous fluxes are calculated with the directional derivative method. Numerical results of hydrodynamic force,pressure on the blades of propeller P4119 agree with the experimental data very well.The unsteady flow shed from NACA0012 at 15°angle of attack is given.

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'Rk9kep&\rvry0【论文关键词】 大涡模拟; 有限体积法; 非结构网格; 黏性流场
]f4{:J&Ewd3gi3K0【英文论文关键词】 Large Eddy Simulation(LES); Finite Volume Method(FVM); Unstructured Mesh; Viscous flow

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TAG: 网格 黄振宇 黏性 洪方文 韦喜忠
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