| 非结构隐式LU-SGS方法在空心弹丸流场数值模拟中的应用 |
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| 引用本文： | 任登凤, 谭俊杰, 张军. 非结构隐式LU-SGS方法在空心弹丸流场数值模拟中的应用[J]. 力学与实践, 2006, 28(5): . doi: 10.6052/1000-0992-2005-331 |
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| 作者姓名： | 任登凤 谭俊杰 张军 |
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| 作者单位： | 南京理工大学动力工程学院,南京; 南京理工大学动力工程学院 南京 210094; 南京理工大学动力工程学院 |
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| 摘 要： | 采用非结构网格的LU-SGS隐式算法计算三维Euler方程，数值模拟了不同马赫数以及不同攻角下某空心弹丸绕流流场，分析了流场的波系结构及其升阻力特性，计算结果表明空心弹丸的阻力系数比同口径的普通弹丸的阻力系数大约小30{%}，空心弹丸的阻力系数以及升力系数随攻角的变化规律与普通弹丸一致.
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| 关 键 词： | 非结构网格 LU-SGS隐式算法 数值模拟 空心弹丸 升力特性 阻力特性 |
| 收稿时间： | 2005-09-05 |
| 修稿时间： | 2006-01-04 |
FLOWFIELD CALCULATION OF HOLLOW PROJECTILE USING IMPLICIT LU-SGS SCHEME BASED ON UNSTRUCTURED MESHES |
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| FLOWFIELD CALCULATION OF HOLLOW PROJECTILE USING IMPLICIT LU-SGS SCHEME BASED ON UNSTRUCTURED MESHES[J]. Mechanics in Engineering, 2006, 28(5): . doi: 10.6052/1000-0992-2005-331 |
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| Abstract: | The implicit LU-SGS scheme based on unstructured meshesis employed to solve three-dimensional Euler equations. The flow field of ahollow projectile is numerically simulated for different Mach number anddifferent attack angle. Complicated flow structure and its lift and dragcharacteristics are discussed. The numerical results indicate that the dragcoefficient of a hollow projectile is smaller by about 30 percent than that of a commonprojectile with the same diameter, and the correlationsbetween the drag and the lift coefficients of the hollow projectile and theattack angle are in agreement with those of the common projectile.The results are relevant to engineering designs. |
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| Keywords: | unstructured mesh implicit LU-SGS scheme numerical simulation hollow projectile lift characteristic drag characteristic |
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