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Flow Characteristics and Turbulence Simulation for an Aircraft Cabin Environment

机译:飞机机舱环境的流动特性和湍流仿真

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In the paper it is theoretically proven that the topological structure of the airflow field in an airliner cabin is absolutely unstable. These are typical flow characteristics in the cabin. This also explains why in previous numerical simulations and experiments, discrepancies often arose in flow-direction results. Next, we used the fine LES with 22 million grid cells to reproduce the primary flow instability phenomenon in a symmetric cabin. However, the unsteady RANS (URANS) method with conventional turbulence models, such as the RNG k-£ turbulence mode, the Realizable k-e turbulence model and the V2f turbulence model, cannot effectively simulate the instability of flow field in a symmetric cabin. So we developed an anisotropic model (BV2fAM) based on the idea of the V2f model. Three million grid cells are used in the BV2fAM simulation. The flow instability phenomenon is successfully reproduced in the numerical simulation of BV2fAM.
机译:在本文中,理论上证明了客机舱内气流场的拓扑结构绝对不稳定。这些是机舱内的典型流动特性。这也解释了为什么在以前的数值模拟和实验中,差异通常在流动方向结果中出现。接下来,我们使用了具有2200万个网格细胞的细小的细胞,以在对称舱中再现主要流动不稳定现象。然而,具有传统湍流模型的不稳定RAN(URANS)方法,例如RNG K-INCULENCE模式,可实现的K-E湍流模型和V2F湍流模型,不能有效地模拟对称舱中流场的不稳定性。因此,我们基于V2F模型的思想开发了一个各向异性模型(BV2FAM)。在BV2FAM仿真中使用了三百万个网格细胞。在BV2Fam的数值模拟中成功再现了流动不稳定现象。

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