基于高阶和高分辨率格式的自然空泡流数值模拟(郭建红; 鲁传敬; 陈鑫; 陈瑛; 潘展程)

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h |!Y)su6~l0基于高阶和高分辨率格式的自然空泡流数值模拟

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~8o0z#w/\J;im0【作者】郭建红; 鲁传敬; 陈鑫; 陈瑛; 潘展程 【作者单位】上海交通大学船舶海洋与建筑工程学院水利论文%ur}X;dk:pP

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zKq yJ*yd3C0【论文摘要】 基于均质平衡流模型和 SIMPLB 算法,采用二阶迎风格式(SUD)、二次迎风插值格式 (QUICK)、三次迎风插值格式(CUI)及高分辨率格式(TVD)等多种高阶对流离散格式,对于自然空泡湍流流动的数值计算方法进行了研究.发现高阶格式能够有效抑制一阶迎风格式 (UDS)产生的假扩散,并得到更薄,更"透明"的汽-液界面,其中高分辨率 TVD 格式最好地捕捉了空泡界面附近物理量的阶跃特性.采用各种格式所得到的计算值与近似值及试验值的对比表明,应用高阶格式能得到更精确的空泡形态.水利论文?3Dmwf8S

/D2U&iP b0【英文论文摘要】 Based on homogeneous equilibrium flow model and SIMPLE algorithm,the second-order upwind difference scheme(SUD),the quadratic interpolation for convective kinematics(QUICK), the cubic upwind interpolation scheme(CUI)and high-resolution total variation diminishing schemes(TVD)were applied to study the numerical method for the natural turbulent cavitating flows.The calculation results showed that the high-order schemes can effectively suppress the false diffusion which UDS exhibited and obtained thinner and glossier liquid/vapor interface,in which the TVD scheme best captured the discontinuity of variables at the liquid/vapor interface.By comparing the computed results with the asymptotic solution and experimental data,it was found that the cavity shape computed by high-order convection schemes were more accurate.

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9DHz1[@$B|&~1b0【论文关键词】 自然空泡; 高阶对流离散格式; 空泡形态水利论文;ak4h0Q a5e
【英文论文关键词】 natural cavitating; high-order convection schemes; cavity shape

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