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A Fluid-Structure Interaction case study on a square sail in a wind tunnel

机译：风洞中方形帆的流固耦合作用研究

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摘要

A Fluid-Structure Interaction (FSI) conventional case study is proposed to be used as a benchmark for numerical analyses. Experimental tests were carried out to provide targets for comparisons; in particular, the study regarded the estimate of the deformed configuration ("flying shape" in the sailing field) of a square sail under a uniform flow regime in a wind tunnel facility. Several tests have been carried out at different wind velocities. The sailcloth has been characterized by means of mono-axial tensile tests obtaining Young's and shear moduli as well as Poisson's coefficients, which have then been used as input parameters for numerical analyses. Test results are considered a benchmark target deserving challenging aspects for numerical simulations in spite of the selected simple test geometry and conditions. Numerical tests have been carried out by means of a commercial software (ADINA (TM)). Analyses used a strongly coupled partitioned approach between a Finite Volume Method (FVM) based on Reynolds Averaged Navier Stokes (BANS) equations, whereas a Finite Element Method (FEM) has been adopted for the structural field. A comparison has been eventually carried out assessing different numerical models. A good overall agreement between experimental and numerical results has been obtained by suitably setting FSI simulation algorithms.
机译：提出了一种流体-结构相互作用（FSI）的常规案例研究作为数值分析的基准。进行了实验测试以提供比较的目标；特别是，该研究考虑了风洞设施中均匀流态下方帆变形构型（航行场中的“飞行形状”）的估计。在不同的风速下进行了几次测试。通过获得杨氏模量和剪切模量以及泊松系数的单轴拉伸试验，对船帆进行了表征，然后将其用作数值分析的输入参数。尽管选择了简单的测试几何形状和条件，但测试结果仍被认为是基准目标，值得进行数值模拟方面的挑战。已经通过商业软件（ADINA TM）进行了数值测试。分析使用了基于雷诺平均纳维埃斯托克斯（BANS）方程的有限体积法（FVM）之间的强耦合分区方法，而结构领域则采用了有限元法（FEM）。最终进行了比较，以评估不同的数值模型。通过适当设置FSI仿真算法，可以在实验结果和数值结果之间取得良好的总体一致性。

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