Optimization of Parameter Values in the Turbulence Model Aided by Data Assimilation
Optimization of Parameter Values in the Turbulence Model Aided by Data Assimilation
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DOI：
10.2514/1.j054109
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发表时间：
2016-03
期刊：
影响因子：
2.5
通讯作者：
H. Kato;Keiichi Ishiko;A. Yoshizawa
中科院分区：
文献类型：
--
作者：
H. Kato;Keiichi Ishiko;A. Yoshizawa
本研究提出一种资料同化方法，用以估计紊流模式的最佳参数值。将所提出的方法应用于修正的Menter k-ω剪切应力输运湍流模型中参数a1的估计。为此，采用基本湍流，即二维后向台阶上的流动。a1的估计值（1.0）不同于其原始值（即，0.31）。修正的Menter k-ω剪切应力输运湍流模型（a1 = 1.0）在几个湍流计算中得到了验证;二维后向台阶和二维平板边界层上的流动，RAE 2822翼型周围的二维跨音速流动，以及ONERA M6机翼周围的三维跨音速流动。在模拟中，修正的Menter k-ω剪切-应力输运湍流模型（a1 = 1.0）比原修正的Menter k-ω剪切-应力输运湍流模型更好地模拟了分离流动和逆压梯度流动。
This study proposes a data assimilation methodology for estimating the optimal parameter values of turbulence models. The proposed methodology was applied to the estimation of the parameter a1 in the modified Menter k-ω shear-stress transport turbulence model. For this purpose, a fundamental turbulent flow, namely, the flow over a two-dimensional backward-facing step, was employed. The estimated value of a1 (1.0) differed from its original value (i.e., 0.31). The modified Menter k-ω shear-stress transport turbulence model with a1=1.0 was validated on several turbulent flow calculations; flows over a two-dimensional backward-facing step and a two-dimensional flat-plate boundary layer, two-dimensional transonic flows around the RAE 2822 airfoil, and three-dimensional transonic flows around the ONERA M6 wing. In simulations, the modified Menter k-ω shear-stress transport turbulence model with a1=1.0 better modeled the separated and adverse pressure gradient flows than the original modified Menter k-ω shear-s...