| 引用本文: | 祝志文,陈政清,陈伟芳.用动网格法计算理想平板的颤振导数.[J].国防科技大学学报,2002,24(3):13-17.[点击复制] |
| ZHU Zhiwen,CHEN Zhengqing,CHEN Weifang.Assessment of Aerodynamic Derivatives of the Ideal Flat Plate Based on the Moving Grid Method[J].Journal of National University of Defense Technology,2002,24(3):13-17[点击复制] |
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| 用动网格法计算理想平板的颤振导数 |
| 祝志文1, 陈政清1, 陈伟芳2 |
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(1.中南大学 铁道校区土木建筑学院，湖南 长沙 410075;2.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: |
| 提出了一种数值模拟振动的理想平板绕流场，并提取其气动导数的方法。时间相关的不可压N-S方程采用Projetion-2格式解耦，关于中间速度的动量方程的时间和空间离散采用二阶半隐格式，压力Possion方程迭代用多层网格法加速收敛。分别计算平板作竖向强迫振动或扭转强迫振动的气动力，用动网格法考虑平板和气流的耦合作用。由计算得到的气动力用最小二乘法确定8个气动导数。计算结果和理想平板的Theodorsen理论值有较好的一致性。 |
| 关键词: 理想平板 不可压N-S方程 动网格法 Projection-2格式 气动导数 |
| DOI： |
| 投稿日期：2002-02-28 |
| 基金项目:国家自然科学基金项目(59895410) |
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| Assessment of Aerodynamic Derivatives of the Ideal Flat Plate Based on the Moving Grid Method |
| ZHU Zhiwen1, CHEN Zhengqing1, CHEN Weifang2 |
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(1.College of Civil and Architectural Engineering , Central South Univ. , Changsha 410075, China;2.College of Aerospace and Materials Engineering,National Univ. of Defense Technology,Changsha 410073,China)
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| Abstract: |
| Numerical simulation of the flow field around the oscillating ideal flat plate is presented to assess the aerodynamic derivatives. The time-dependent incompressible Navier-Stokes equations are decoupled using Projection-2 method. The second order semi-implicit scheme is employed in temporal and spatial discretization for the momentum equations of intermediate velocities, while the Possion's equation for pressure is solved efficiently by using the multigrids method. Unsteady aerodynamic force on the heaving or pitching oscillated flat plate are computed and the motion of the plate is accounted by the moving grid method. The aerodynamic derivatives are extracted with the Least Square Method. The computed aerodynamic derivatives are in better agreement with Theodorsen's theoretic solutions. |
| Keywords: flat plate incompressible N-S equation moving grids method Projection-2 scheme aerodynamic derivatives |
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