Comparison of Numerical Flow Field Predictions for Army Airdrop Systems
Comparison of Numerical Flow Field Predictions for Army Airdrop Systems
复制标题
陆军空投系统数值流场预测的比较
DOI：
10.2514/6.1999-1715
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
R. Benney
中科院分区：
文献类型：
--
作者：
J. Sahu;H. Edge;K. Heavey;K. Stein;R. Benney
翻译后摘要：已经进行了计算研究，以确定使用计算流体动力学（CFD）陆军空投系统的空气动力学。由于缺乏全面的实验数据，很难对空投系统的CFD软件包的流场预测进行验证。这对于真实的系统尤其如此，因为在测试期间获得期望的流场数据对于可用的技术是不实际的或不可能的。本报告研究了两个不同的CFD代码对相同空投系统的预测结果，作为验证用于模拟空投系统的高性能计算软件的第一步。对美国陆军使用的两种空投系统：T-10人员系统（无载荷）和G-12货物系统（有载荷和无载荷）进行了数值计算。用于比较的两个软件包是采用不可压缩Navier-Stokes方程的稳定半离散有限元公式的CFD代码和商用代码CFD++。在本数值试验中，采用相同的非结构网格得到了计算的非定常流场，并对预测的流场进行了比较。比较中的相似性和差异突出显示，并从这些结果得出结论。
Abstract : A computational study has been performed to determine the aerodynamics of Army airdrop systems using computational fluid dynamics (CFD). The validation of flow field predictions from CFD software packages for airdrop systems is difficult because comprehensive experimentally obtained data are lacking. This is especially true for real systems because obtaining desired flow field data during a test is not practical or possible with available technologies. This report examines the results of predictions from two separate CFD codes for the same airdrop systems as an initial step toward validating high performance computing software for modeling airdrop systems. Numerical results have been obtained on two airdrop systems used by the U.S. Army: the T-10 personnel system (no payload) and the G-12 cargo system with and without a payload. The two software packages used for the comparisons are a CFD code that employs a stabilized semi-discrete finite element formulation of the incompressible Navier-Stokes equations and CFD++, a commercially available code. For this numerical experiment, computed unsteady flow fields were obtained with the same unstructured mesh, and predicted flow fields were compared. Similarities and discrepancies in the comparisons are highlighted, and conclusions are drawn from these results.