Initial RANS and DDES of a Rudimentary Landing Gear
Initial RANS and DDES of a Rudimentary Landing Gear
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DOI：
10.1007/978-3-642-14168-3_8
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
P. Spalart;M. Shur;M. Strelets;A. Travin
中科院分区：
文献类型：
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作者：
P. Spalart;M. Shur;M. Strelets;A. Travin
提出了新的起落架研究模型的 RANS 和延迟分离涡模拟 (DDES) 的结果。该设计与 Lazos 一样简单，但其主要动机是弱且易于理解的雷诺数依赖性。这种简单性应该允许现在或几年内实现本质上网格融合的 RANS-LES 解决方案，但它保留了一些对 CFD 提出挑战的物理原理，这对起落架的噪声预测能力有意义。这项工作中提出的初步模拟与最近在 NAL（印度）发起的一项实验研究并行。模拟的一个主要目标是验证 RLG 几何结构在 CFD 验证方面的潜力，并吸引湍流和机身噪声界对实验数据库的关注，该数据库将在不久的将来推出。 CFD 的主要早期挑战是预测壁压波动。远场噪声将在稍后解决。
Results of RANS and Delayed Detached Eddy Simulation (DDES) are presented for a new research model of landing gear. The design is as simple as that of Lazos but a primary motivation for it is a weak and well-understood Reynolds-number dependence. The simplicity should allow essentially grid-converged RANS-LES solutions now or within a few years, but it preserves some physics, which challenge CFD, in a manner meaningful to noise-prediction capability for landing gear. The initial simulations presented in this work parallel an experimental study launched recently at NAL (India). A major goal of the simulations is to verify the potential of the RLG geometry in terms of CFD validation and to attract the attention of the turbulence and airframe noise communities to the experimental database, which will be available in the near future. The principal early challenge to CFD is to predict the wall-pressure fluctuations. Far-field noise will be addressed later.