Development of efficient and accurate CFD technologies for wind turbine unsteady aerodynamics
Development of efficient and accurate CFD technologies for wind turbine unsteady aerodynamics
复制标题
开发高效、准确的风力涡轮机非定常空气动力学 CFD 技术
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
M. Ahmadi
中科院分区：
文献类型：
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作者：
M. Campobasso;A. Bonfiglioli;M. Ahmadi
本文重点介绍了风力机CFD中结构化显式欧拉求解器和非结构化隐式欧拉/RANS求解器的非定常和低速新算法的发展。中心主题是a)讨论以最先进的收敛加速方法为特征的显式解算器的最优低速预处理的定义，b)提出一种简单的最优混合预处理策略，以及c)在隐式非结构化代码中实现一种迄今为止仅用于稳定问题的预处理方法。这些技术是彻底验证，考虑低速流场过去的俯仰风力涡轮机翼型。通过计算经过同一翼型的失速流，也证明了隐式方法的优良计算性能。结果表明，该算法具有较高的计算效率和准确性。
This paper focuses on novel unsteady and low speed algorithmic developments of a structured explicit Euler solver and an unstructured implicit Euler/RANS solver for wind turbine CFD. The central topics are a) a discussion on the definition of optimal low-speed preconditioning for explicit solvers featuring state-of-the-art convergence acceleration methods, b) the presentation of a simple optimal mixed preconditioning strategy, and c) the novel implementation in the implicit unstructured code of a preconditioning method which thus far has only been used for stedy problems. These technologies are thouroughly validated by considering a low-speed flow field past a pitching wind turbine airfoil. The excellent computational performance of the implicit approach is also demonstrated by computing the stalled flow past the same airfoil. All results demonstrate the accuracy and computational efficiency of these algorithms.