摘要
详细介绍了γ-Reθt转捩模型与S-A一方程湍流模型相结合组成的γ-Reθt-SA转捩模型及该模型中参数修正过程,并将Spalart为控制自由来流湍流度衰减而提出的环境源项法引入到该模型中。利用已有的RANS求解器平台实现了该转捩模型,对Aerospatiale-A翼型、S809翼型和30P30N三段翼的绕流问题进行了模拟,将计算结果与实验结果进行了对比分析,计算结果表面该模型可以较为准确地预测不同计算条件下的翼型流场中分离诱导转捩和自然转捩的位置以及再层流化等流动现象,其计算效率及精度能够满足工程应用要求。同时,该模型的研究与开发对于后续发展具有转捩预测能力的RANS-LES方法奠定了基础。
The γ-Peθt-SA transition model, which is composed of Spalart-Allmaras（S-A） one-equation turbulence model and 7-Reot transition model, has been described in details, together with the correction of the parameters in the model. Besides, the ambient source term method, which is proposed by Spalart in or der to controlling the free flow turbulence attenuation, has been introduced in this model. Based on an in house RANS solver, the γ-Peθt-SA transition model has been developed, and been verified in simulations of the flow around various airfoils, including Aerospatiale A, S809, and 30P30N multi-element foil. The re sults of simulation have been compared with the experimental data, which indicate that the model can predict transition accurately in various types of flow conditions, such as natural transition, separated transition and relaminarization. Moreover, the study cases have shown that the model meet engineering requirement in both precision and efficiency. Finally, the developed model profits the establishment of a hybrid RANS-LES model with the transition predicting capability in the future.
出处
《空气动力学学报》
CSCD
北大核心
2013年第5期604-610,共7页
Acta Aerodynamica Sinica
