In this work the partitioned solution approach for the fluid–structure interaction (FSI) of thin-walled structures and high-Reynolds number (Re) flows modeled using Reynolds–Averaged Navier–Stokes (RANS) and hybrid Reynolds–Averaged Navier–Stokes – Large Eddy Simulation (RANS–LES) turbulence models are described. The advanced turbulence modeling is needed to capture very complex fluid phenomena which triggers instabilities of thin–walled structures present in supersonic flow regimes. The finite element (FE) updated Lagrangian formulation (ULF) for the nonlinear elastic solids is used to predict its dynamical behavior. The main contribution addresses to the linear stress–strain relation Laplacian members, which are solved implicitly, on that way decreasing required memory resources and improving solution stability in the same time. The structures of the interest include the vast variety of membranes, curved shells and plates. The instabilities encountering these structures include limit cycle oscillations (LCO), flutter and buckling of the panels. The phenomena appear in everyday engineering practice and a need for the powerful tools to handle such problems is a common goal. Utilization of the unstructured non-regular meshes allows the precise distribution of computational nodes at the physical boundaries of the fluid and solid domains. It is naturally allowing application of the common approach for the fluid–solid interface coupling, as well as classical data interpolation schemes between fluid and solid on the FSI interface. High-Re flows, both 2D (benchmark) and 3D turbulent FSI case are chosen for the validation. Two numerical methods are coupled via a moving boundary treatment, in a staggered way. The proposed coupling method showed a good agreement with the reference test cases. The current FSI framework is developed to serve as a tool for the liquid rocket engine development.

在这项工作中，用于薄壁结构和高雷诺数（Re）描述了使用雷诺平均纳维斯托克斯（RANS）和混合雷诺平均纳维斯托克斯-大涡模拟（RANS-LES）湍流模型建模的流动。需要先进的湍流模型来捕获非常复杂的流体现象，这会触发超音速流态中存在的薄壁结构的不稳定性。非线性弹性固体的有限元（FE）更新的拉格朗日公式（ULF）用于预测其动力学行为。主要贡献指向线性应力-应变关系拉普拉斯算子，这些算子被隐式地求解，这样就减少了所需的存储资源并同时提高了解决方案的稳定性。感兴趣的结构包括各种各样的膜，弯曲的外壳和板。遇到这些结构的不稳定性包括极限循环振动（LCO），面板的颤动和屈曲。这种现象出现在日常工程实践中，并且需要强大的工具来处理此类问题是一个共同的目标。利用非结构化非规则网格可以使计算节点在流体域和固体域的物理边界上精确分布。自然地，可以将常见方法应用于流固界面，以及FSI界面上的流固之间经典的数据插值方案。高的- 利用非结构化非规则网格可以使计算节点在流体域和固体域的物理边界上精确分布。自然地，可以将通用方法应用于流固界面，以及FSI界面上的流固之间的经典数据插值方案。高的- 利用非结构化非规则网格可以使计算节点在流体域和固体域的物理边界上精确分布。自然地，可以将常见方法应用于流固界面，以及FSI界面上的流固之间经典的数据插值方案。高的-回流时，选择2 D（基准）和3 D湍流FSI情况进行验证。两种数值方法通过移动边界处理以交错方式耦合。所提出的耦合方法与参考测试案例显示出良好的一致性。当前的FSI框架被开发用作液体火箭发动机开发的工具。