分离涡模拟类方法发展及在叶轮机械内流场的应用

分离涡模拟(Detached eddy simulation,DES)方法是目前支撑叶轮机械精细化设计的高精度且工程可实现的数值模拟方法之一。本文简要回顾了DES类方法的发展历程、存在问题和解决方法,并以基于一方程的DES类方法为例阐明其构造思路。在准确性验证方面,针对叶轮机械中普遍存在的分离和转捩现象,结合当前DES类方法对经典物理模型的模拟结果,分析了DES类方法对该现象的预测能力。在此基础上,对DES类方法在直叶栅、亚声速和跨声速叶轮机械内流场的预测精度及应用现状进行了简要评述,并着重分析了当前DES类方法在叶轮机械应用中需要兼顾的问题,为下一步DES方法在高性能压气机设计中的应用提供参考。

Review of Development of DES and Its Application in Turbomachinery

Detached eddy simulation(DES) is one of the numerical simulation methods with high-precision and feasibility in engineering, which can support refinement design for turbomachinery. This paper briefly reviews the development, problems and solutions of DES method, and illustrates the construction idea of the DES method based on one-equation turbulence model.In the aspect of accuracy verification, based on the simulation results of the classical physics model, the prediction accuracy of DES method for separation and transition phenomena which is ubiquitous in turbomachinery is analyzed. On the basis of this, the prediction accuracy and application of the DES method in internal flow field,like cascade, subsonic and transonic turbomachinery, are briefly reviewed. Finally, the issues that need serious consideration for application of DES method to turbomachinery are presented. This paper provides reference for application of DES method to high-performance compressor design.