The purpose of this research is to present a new idea of reduced-order modelling of unsteady flows without static correction, which is based on fluid eigenmodes. The new reduced order model is formulated based on a new form of wake vortices without static correction. This technique is expected to perform a reduced-order model similar but faster than the previous techniques. The new method is used to analyse unsteady flows over a three-dimensional wing and comparing with the previous techniques. The performances of the present method are demonstrated with numerical examples. The results show the accuracy of the new reduced-order model of unsteady flow with higher computational efficiency. In conclusion, the new method can be considered as an alternative technique to perform the reduced-order models of unsteady flow.

本研究的目的是提出一种基于流体特征模态的无静校正非定常流动降阶建模的新思路。新的降阶模型是基于一种新形式的尾流涡流制定的，没有静校正。预计该技术将执行与以前的技术相似但速度更快的降阶模型。新方法用于分析三维机翼上的非定常流动并与以前的技术进行比较。通过数值例子证明了本方法的性能。结果表明，新的非定常流降阶模型具有更高的计算效率。总之，新方法可以被认为是执行非定常流降阶模型的替代技术。