Transonic store separation using a three-dimensional chimera grid scheme
Transonic store separation using a three-dimensional chimera grid scheme
复制标题
使用三维嵌合网格方案进行跨音速存储分离
DOI：
--
复制
发表时间：
1989
期刊：
影响因子：
--
通讯作者：
J. Kuan
中科院分区：
文献类型：
--
作者：
F. Dougherty;J. Kuan
本文描述了利用有限差分技术对飞机装载物料的流动进行数值模拟的能力。由于单个全局网格很难生成，因此使用了一种称为嵌合体方案的多overset网格方法。在嵌合体方案中，一个复杂的结构，如机翼，其下面有存储库，被映射为一个关于主要部件的全局网格，机翼，并为每个附加部件（如存储库）生成小的覆盖网格。小网格覆盖在全局网格上，不匹配任何边界。因此，这些小网格可以相对于全局网格自由移动。在不重新定义结构的情况下，对机翼下移动的仓库进行时间精确模拟是可能的。结合时变欧拉算法的嵌合体方案是一种可行的分离物料流动模拟方法。本文的试验表明，该方法能很好地保持时间精度，记录程序能够在三维空间上跟踪运动网格，并且可以模拟流场空气动力学。
The development of a numerical simulation capabihty using finite-difference techniques for flows about aircraft carrying stores is described. Since a single global mesh a t o u t the aircraft with stores is very difficult t o generate, a multiple overset mesh approach called the chimera scheme is used. In the chimera scheme, a complex configuration such as a wing with stores beneath it is mapped with a global mesh about the main component, the wing, and minor overset meshes are generated about each additional component such as the stores. The minor meshes are overset on the global mesh without matching any boundaries. As such, these minor meshes can be freely moved with respect to the global mesh. and the time-accurate simulation of a moving store beneath a wing is possible without regridding the configuration. The use of the chimera scheme combined with a time-dependent Euler algorithm is shown to be a viable technique for the simulation of flows about separating stores. Tests run in this paper show that the time accuracy is adequately maintained, the bookkeeping routines are capable of tracking the moving grids in three dimensions, and simulation of the flow field aerodynamics is clearly possible.