کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
796863 1466592 2015 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simulating the fluid forces and fluid-elastic instabilities of a clamped–clamped cylinder in turbulent axial flow
ترجمه فارسی عنوان
شبیه سازی نیروهای سیال و ناپایداری های مایع الاستیک یک سیلندر چپ گیر در جریان محوری آشفته
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی

In this paper, the fluid forces and the dynamics of a flexible clamped–clamped cylinder in turbulent axial flow are computed numerically. In the presented numerical model, there is no need to tune parameters for each specific case or to obtain coefficients from experiments. The results are compared with the dynamics measured in experiments available in the literature. The specific case studied here consists of a silicone cylinder mounted in axial water flow. Computationally it is found that the cylinder loses stability first by buckling. The threshold for buckling is in quantitative agreement with experimental results and weakly nonlinear theory. At higher flow speed a fluttering motion is predicted, in agreement with experimental results. It is also shown that even a small misalignment between the flow and the structure can have a significant impact on the dynamical behavior. To provide insight in the results of these fluid–structure interaction simulations, forces are computed on rigid inclined and curved cylinders, showing the existence of two different flow regimes. Furthermore it is shown that the inlet turbulence state has a non-negligible effect on these forces and thus on the dynamics of the cylinder.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 55, May 2015, Pages 139–154
نویسندگان
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