Hybrid RANS/LES Capabilities of the Flow Solver FLOWer—Application to Flow Around Wind Turbines
Hybrid RANS/LES Capabilities of the Flow Solver FLOWer—Application to Flow Around Wind Turbines
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流动求解器 FLOWer 的混合 RANS/LES 功能 - 在风力涡轮机周围流动中的应用
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
E. Krämer
中科院分区：
文献类型：
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作者：
P. Weihing;Johannes Letzgus;G. Bangga;T. Lutz;E. Krämer
德国航空航天中心（DLR）的可压缩块结构流动求解器FLOWer已扩展到最先进的分离涡模拟（DES）方法，以进行旋转机翼周围流动的混合RANS/LES模拟。验证了程序对衰减各向同性湍流的大涡模拟能力。采用五阶WENO格式和适当的低马赫数修正避免了过多的数值耗散。在通过模拟墨西哥模型风力涡轮机在失速条件下运行的流动并与实验数据进行比较之前，首先在有充分记录的测试用例中验证了DES的实现，这些测试用例面向后台阶和NACA0021翼型在（60^circ）入射下进行了验证。从后者出发，推导了关于数值设置的建议，以成功地建立风力涡轮机或直升机应用的涡解析模拟。
The compressible block-structured flow solver FLOWer of the German Aerospace Center (DLR) has been extended towards state of the art detached-eddy simulation (DES) methods in order to conduct hybrid RANS/LES simulations of flow around rotary wings. The large-eddy simulation (LES) capabilities of the code are demonstrated for decaying isotropic turbulence. Excessive numerical dissipation is avoided by using the fifth-order WENO scheme and an appropriate low-Mach number correction. The DES implementations are validated first for the well documented test cases backward facing step and NACA0021 airfoil at (60^circ ) incidence, before increasing the complexity by simulating the flow around the MEXICO model wind turbine operating in stalled conditions and comparing with experimental data. From the latter, recommendations on the numerical settings are derived to successfully set up eddy resolving simulations for wind turbine or helicopter applications.