| 引用本文: | 牟斌,刘伟,瞿章华.球锥体高超声速绕流的俯仰阻尼导数的数值计算.[J].国防科技大学学报,2000,22(4):5-8.[点击复制] |
| MOU Bin,LIU Wei,QU Zhanghua.Numerical Calculation of Damping-in-Pitch Derivatives for Hypersonic Flow over Sphere-Cone Bodies[J].Journal of National University of Defense Technology,2000,22(4):5-8[点击复制] |
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| 球锥体高超声速绕流的俯仰阻尼导数的数值计算 |
| 牟斌, 刘伟, 瞿章华 |
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(国防科技大学 航天与材料工程学院, 湖南 长沙 410073)
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| 摘要: |
| 采用 Navier-Stokes 方程描述球锥体外形非定常振动流场, 在 Etkin 理论下给出俯仰阻尼导数的计算公式。对定常流场的计算采用 ADI 形式的 NND 格式, 对非定常流场的计算采用四步 Runge-Kutta 方法, 并引入变系数残值光顺技术加速收敛。将俯仰阻尼导数计算结果与实验及工程计算进行了比较, 并数值研究了其随振动中心的变化规律。 |
| 关键词: 俯仰阻尼导数 Navier-Stokes 方程 非定常流 数值模拟 |
| DOI： |
| 投稿日期：1999-12-10 |
| 基金项目:国家863航天高技术项目资助(863-2.98.6) |
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| Numerical Calculation of Damping-in-Pitch Derivatives for Hypersonic Flow over Sphere-Cone Bodies |
| MOU Bin, LIU Wei, QU Zhanghua |
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(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The full Navier-Stokes equations are adopted to describe the unsteady oscillating flow f ield over the sphere-cone. The formula of damping-in-pitch derivatives is presented under Etkin’s theory. The steady flow field is solved by the NND scheme in ADI form, and the unsteady flow field is solved by combining the four-stage Runge-Kutta scheme and implicit residual smoothing method. The numerical results are compared with experiment and ENT calculation. The tide of the derivatives varying along with the position of oscillation center is studied. |
| Keywords: damping-in-pitch derivatives Navier-Stokes equations unsteady flow numerical simulation |
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