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- Title
Large eddy simulation of aircraft wake vortex with self-adaptive grid method.
- Authors
Lin, Mengda; Cui, Guixiang; Zhang, Zhaoshun
- Abstract
A self-adaptive-grid method is applied to numerical simulation of the evolution of aircraft wake vortex with the large eddy simulation (LES). The Idaho Falls (IDF) measurement of run 9 case is simulated numerically and compared with that of the field experimental data. The comparison shows that the method is reliable in the complex atmospheric environment with crosswind and ground effect. In addition, six cases with different ambient atmospheric turbulences and Brunt V¨ais¨al¨a (BV) frequencies are computed with the LES. The main characteristics of vortex are appropriately simulated by the current method. The onset time of rapid decay and the descending of vortices are in agreement with the previous measurements and the numerical prediction. Also, secondary structures such as baroclinic vorticity and helical structures are also simulated. Only approximately 6 million grid points are needed in computation with the present method, while the number can be as large as 34 million when using a uniform mesh with the same core resolution. The self-adaptive-grid method is proved to be practical in the numerical research of aircraft wake vortex.
- Subjects
IDAHO Falls (Idaho); LARGE eddy simulation models; ADAPTIVE control systems; CROSSWINDS; ATMOSPHERIC turbulence
- Publication
Applied Mathematics & Mechanics, 2016, Vol 37, Issue 10, p1289
- ISSN
0253-4827
- Publication type
Article
- DOI
10.1007/s10483-016-2132-9