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Numerical study on jet-wake vortex interaction of aircraft configuration

机译：飞机构型的尾流相互作用的数值研究

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The interaction of aircraft exhaust jet and wake vortex generated from a realistic aircraft configuration was numerically studied from the early phase until the complete roll-up. For numerical simulation we employed an unstructured mesh Reynolds-averaged Navier-Stokes (RANS) solver for the flow around an aircraft model, while a Cartesian mesh large-eddy simulation solver implemented on the framework of the building-cube method (BCM) was used for the simulation of the mid- to far-field wake. We especially investigated the feasibility of a coupling approach of the steady RANS solver and the Cartesian LES solver in the simulation of the jet-wake vortex interaction, where unsteady velocity fluctuations are stochastically reproduced based on RANS turbulence variables. The results showed that a multi-level Cartesian mesh of the BCM was effective to capture the evolution of aircraft wake including exhaust jet. The velocity profiles of a wake vortex are compared with several vortex models, which reveals that the velocity profiles fit with different vortex models depending on the vortex ages. The normalized temperature of exhaust jet is compared with the experiment, which confirms that the temperature information is appropriately transferred from the near- to the far-field simulation. (C) 2017 Elsevier Masson SAS. All rights reserved.
机译：从早期阶段到完全卷起，从数值上研究了飞机排气流与现实飞机配置产生的尾流涡流之间的相互作用。对于数值模拟，我们使用非结构化网格雷诺平均Navier-Stokes（RANS）求解器来求解飞机模型周围的流动，而使用在建筑立方体法（BCM）框架下实现的笛卡尔网格大涡模拟求解器用于模拟中远场尾迹。我们特别研究了稳定的RANS求解器和笛卡尔LES求解器耦合方法在喷气-尾流涡流相互作用模拟中的可行性，在该模拟中，基于RANS湍流变量随机再现了非稳态速度波动。结果表明，BCM的多级笛卡尔网格可有效捕获包括尾流喷射在内的飞机尾流的演变。将尾流涡流的速度分布图与几个涡流模型进行比较，这表明取决于涡旋年龄，速度分布图适合不同的涡旋模型。将排气射流的归一化温度与实验进行了比较，这证实了温度信息已从近场模拟正确传输到远场模拟。 （C）2017 Elsevier Masson SAS。版权所有。

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