Two Better Loosely Coupled Solution Algorithms of CFD Based Aeroelastic Simulation
Two Better Loosely Coupled Solution Algorithms of CFD Based Aeroelastic Simulation
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DOI：
10.1080/19942060.2007.11015197
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发表时间：
2007-01
影响因子：
6.1
通讯作者：
Weiwei Zhang;Yuewen Jiang;Zhengyin Ye
中科院分区：
文献类型：
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作者：
Weiwei Zhang;Yuewen Jiang;Zhengyin Ye
摘要提出了两种基于计算流体动力学（CFD）的时域松耦合求解方法，用于求解非线性流固耦合问题。一种是改进的近似龙格-库塔（IA-R-K）格式，另一种是混合线性多步（HLM）格式。在这两种格式中，均采用了一般气动载荷的多项式外推法。它们通过在每个时间步中仅求解一次流场来实现高阶精度。这不仅提高了计算效率，而且为流固耦合问题的求解提供了方便。Isogai Wing和AGARD Wing 445.6的时域颤振仿真结果表明，它们具有显著的精度、稳定性和计算效率。
Abstract Two loosely coupled solution algorithms based on computational fluid dynamics (CFD) in time-domain are presented in this paper to solve nonlinear fluid-structure interaction problems. One is an improved approximate Runge-Kutta (IA-R-K) scheme and the other is a hybrid linear multi-step (HLM) scheme. Polynomial extrapolation of the general aerodynamic loads is used in these two schemes. They achieve high-order accuracy by solving the flow field only once in each time step. They do not only improve the computational efficiency but also provide working convenience for the fluid-structure interaction solution. Their remarkable accuracy, stability and computational efficiency are demonstrated by time-domain flutter simulation of Isogai Wing and AGARD Wing 445.6.