A novel multi-fidelity coupled simulation method for flow systems

• Published in: Chinese journal of aeronautics 2013-08, Vol.26 (4), p.868-875
• Main Authors: Wang, Peng, Zheng, Yun, Zou, Zhengping, Qi, Lei, Zhou, Zhixiang
• Format: Article
• Language: English
• Subjects: Automation; Complex flow system; Computer simulation; Coupling; Gas turbine engines; Jet engine; Joining; Mathematical models; Multi-fidelity; Networks; Strikes; Three dimensional; Zooming; 合流; 数值模拟; 数字变焦; 模拟方法; 流动系统; 环境开发; 计算结果; 高保真
• ISSN: 1000-9361
• DOI: 10.1016/j.cja.2013.04.022

For the numerical simulation of flow systems with various complex components, the traditional one-dimensional （1D） network method has its comparative advantage in time consuming and the CFD method has its absolute advantage in the detailed flow capturing. The proper coupling of the advantages of different dimensional methods can strike balance well between time cost and accuracy and then significantly decrease the whole design cycle for the flow systems in modern machines. A novel multi-fidelity coupled simulation method with numerical zooming is developed for flow systems. This method focuses on the integration of one-, two-and three-dimensional codes for various components. Coupled iterative process for the different dimensional simulation cycles of sub-systems is performed until the concerned flow variables of the whole system achieve convergence. Numerical zooming is employed to update boundary data of components with different dimen-sionalities. Based on this method, a highly automatic, multi-discipline computing environment with integrated zooming is developed. The numerical results of Y-Junction and the air system of a jet engine are presented to verify the solution method. They indicate that this type of multi-fidelity simulationmethod can greatly improve the prediction capability for the flow systems.