Temporal Large-Eddy Simulations of the Near-Field of an Aircraft Wake

• 作者: Henri Moet Roberto Paoli
• 来源期刊: 流体动力学(英文)
• 学科: 物理学
• 关键词: AIRCRAFT WAKE VORTICES Large-Eddy Simulation WAKE TURBULENCE
• 年，卷（期）: 2018,（2）
• 页码范围: 161-180
• 页数: 20页
• 分类号: O35

摘要

The near-field dynamics of an aircraft wake is studied by means of temporal large-eddy simulations, with and without considering the effect of engine jets. In the absence of jets, the simulations showed the roll-up of the initial vorticity sheet shed by the wing and the occurrence of short-wavelength instability in a pair of primary co-rotating vortices. The main consequence of the instability is the modification of the internal structure of the vortex, compared to the two-dimensional stable behavior. The presence of engine jets affects the roll-up of the vorticity sheet and causes an enlargement of the final merged vortex core compared to the case without jets.