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首页> 外文期刊>AIAA Journal >Fluid-Structure Interaction of an Elastically Mounted Slender Body at High Incidence
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Fluid-Structure Interaction of an Elastically Mounted Slender Body at High Incidence

机译：高入射弹性安装细长体的流固耦合

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摘要

A numerical study of the fluid-structure interaction of an inclined tangent ogive-cylinder rigid body, mounted on torsion springs that can rotate in the pitching, yawing, and rolling directions, is conducted. The body is subjected to three-dimensional compressible laminar flow at a Reynolds number of 30,000 and a Mach number of 0.2. A second-order implicit finite difference scheme is employed for the flow equations, adapted to a curvilinear coordinate system, whereas the coupled structural equations, written using an Euler angle notation, are solved by a fourth-order Runge-Kutta method. A detailed investigation of two angles of attack, alpha = 40 deg and alpha = 55 deg, is described. For a fixed body at alpha = 40 deg, the yaw moment changed smoothly with the location of the circumferential disturbance, whereas at alpha = 55 deg the yaw moment was characterized by an almost square-wave variation behavior with bifurcation points at disturbance circumferential roll angles Phi similar to 90 deg, Phi similar to 140 deg, and Phi similar to 180 deg. For an elastically mounted body, the response at alpha = 40 deg for all disturbance locations resulted in large-amplitude periodic yawing and pitching moments. The response at alpha = 55 deg resulted in large-amplitude moments, which occurred only for disturbance locations that coincided with the bifurcation points of the fixed body. The response at the bifurcation points was found to be quasi-periodic for Phi similar to 90 deg, periodic for Phi similar to 140 deg, and nonstationary for Phi similar to 180 deg.
机译：进行了一个倾斜的正切圆柱齿轮刚体的流固耦合的数值研究，该刚体安装在可以在俯仰，偏航和滚动方向上旋转的扭力弹簧上。物体以30,000的雷诺数和0.2的马赫数进行三维可压缩的层流。流动方程采用二阶隐式有限差分方案，适用于曲线坐标系，而使用欧拉角表示法编写的耦合结构方程则通过四阶Runge-Kutta方法求解。描述了两个攻角α= 40度和α= 55度的详细研究。对于α= 40度的固定物体，偏航力矩随周向扰动的位置而平滑变化，而在α= 55度时，偏航力矩的特征是在扰动周向侧倾角处具有分叉点的几乎方波变化行为Phi近似于90度，Phi近似于140度，Phi近似于180度。对于弹性安装的物体，所有扰动位置在alpha = 40度处的响应都会导致大幅度的周期性偏航和俯仰力矩。在α= 55度时的响应会导致出现大振幅矩，仅在与固定物体的分叉点重合的扰动位置才发生。发现在分叉点的响应对于近似90度的Phi是准周期性的，对于近似140度的Phi是周期性的，对于近似180度的Phi是不稳定的。

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  • 来源
    《AIAA Journal》 |2015年第5期|1309-1318|共10页
  • 作者

    Gendel Sergey; Gottlieb Oded; Degani David;

  • 作者单位

    Technion Israel Inst Technol, Dept Mech Engn, IL-32000 Haifa, Israel;

    Technion Israel Inst Technol, Dept Mech Engn, IL-32000 Haifa, Israel;

    Technion Israel Inst Technol, Dept Mech Engn, IL-32000 Haifa, Israel;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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