A grid deformation technique for unsteady flow computations
A grid deformation technique for unsteady flow computations
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DOI：
10.1002/(sici)1097-0363(20000215)32:3
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发表时间：
2000-02
影响因子：
1.8
通讯作者：
L. Dubuc;F. Cantariti;M. Woodgate;B. Gribben;K. Badcock;B. Richards
中科院分区：
文献类型：
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作者：
L. Dubuc;F. Cantariti;M. Woodgate;B. Gribben;K. Badcock;B. Richards
本文提出了一种基于网格位移超限插值算法的网格变形技术。利用二维流动求解器对该方法进行了测试，该方法采用隐式双时间方法求解变形网格上的非定常欧拉方程，适用于气动弹性和自由水面海洋问题引起的时变几何问题。目前的工作被置于一个多块框架，并适合于一个普遍适用的并行多块流求解器的发展。从NACA0012型的AGARD气动弹性构型中选取了一系列俯仰型试验用例，考察了网格变形的影响，并与刚性旋转网格进行了比较。使用几何守恒定律的效果也进行了检验。最后，给出了一个带有振荡襟翼的威廉姆斯翼型的演示试验案例，展示了网格变形技术的能力。版权所有©2000约翰威利父子有限公司
SUMMARY A grid deformation technique is presented here based on a transfinite interpolation algorithm applied to the grid displacements. The method, tested using a two-dimensional flow solver that uses an implicit dual-time method for the solution of the unsteady Euler equations on deforming grids, is applicable to problems with time varying geometries arising from aeroelasticity and free surface marine problems. The present work is placed into a multi-block framework and fits into the development of a generally applicable parallel multi-block flow solver. The effect of grid deformation is examined and comparison with rigidly rotated grids is made for a series of pitching aerofoil test cases selected from the AGARD aeroelastic configurations for the NACA0012 aerofoil. The effect of using a geometric conservation law is also examined. Finally, a demonstration test case for the Williams aerofoil with an oscillating flap is presented, showing the capability of the grid deformation technique. Copyright © 2000 John Wiley & Sons, Ltd.