Application of Crossflow Transition Criteria to Local Correlation-Based Transition Model
Application of Crossflow Transition Criteria to Local Correlation-Based Transition Model
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DOI：
10.2514/6.2009-1145
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发表时间：
2009-01
期刊：
影响因子：
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通讯作者：
Yuto Watanabe;T. Misaka;S. Obayashi;T. Arima;Yoshihiro Yamagichi
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文献类型：
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作者：
Yuto Watanabe;T. Misaka;S. Obayashi;T. Arima;Yoshihiro Yamagichi
为了将γ-Reθ转变模型应用于具有强三维性的边界层流，研究了横流不稳定性的转变准则。通过将不同偏航角下圆柱体周围流场以及后掠翼周围流场的预测与实验结果进行比较来评估标准。结果发现 Kohama 等人提出的横流准则。是一种很有前途的方法，因为它可以仅使用局部流变量进行评估。偏航气缸的转变预测已通过 γ-Reθ 转变模型和所提出的横流准则进行。确认了由于本标准而产生的涡流粘度。建议对标准进行修改，以处理其对流动条件的依赖性。
Transition criteria for crossflow instability are investigated in order to apply the γ-Reθ transition model to boundary layer flows with strong three-dimensionality. The criteria are evaluated by comparing their predictions with experimental results for the flowfields around a cylinder at various yaw angles, and the flowfields around a swept wing. It is found that the crossflow criterion proposed by Kohama et al. is a promising one because it can be evaluated by using only local flow variables. Transition prediction of a yawed cylinder has been performed by the γ-Reθ transition model with the proposed crossflow criterion. The production of eddy viscosity due to the present criteria was confirmed. A modification of the criterion was suggested to treat its dependency on flow conditions.