Large Eddy simulations and Reynolds-averaged Navier-Stokes simulations of separation-induced transition using an unstructured finite volume solver

M. Carreño Ruiz
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Abstract

Abstract. The study aims to assess the capability of different methodologies in capturing the separation-induced transition phenomenon. This transition mechanism occurs when the flow separates from the airfoil surface, and transitions from a laminar to a turbulent state due to the amplification of the Kelvin-Helmholtz instability developed in the separated shear layer. The simulations employ high-order numerical methods for solving the Navier-Stokes equations, while the transition modeling for RANS is based on the γ-Re_θ transition model. LES enables prediction of the onset and location of transition and provides turbulent flow statistics.
使用非结构有限体积求解器的大涡模拟和分离诱导跃迁的reynolds -average Navier-Stokes模拟
摘要本研究旨在评估不同方法在捕捉分离引起的过渡现象方面的能力。这种过渡机制发生在气流从翼型表面分离,并从层流过渡到湍流状态,由于在分离的剪切层中发展的开尔文-亥姆霍兹不稳定性的放大。模拟采用高阶数值方法求解Navier-Stokes方程,而RANS的过渡模型基于γ-Re_θ过渡模型。LES能够预测过渡的开始和位置,并提供湍流统计数据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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