کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
797123 1466619 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Galloping of square cylinders in cross-flow at low Reynolds numbers
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Galloping of square cylinders in cross-flow at low Reynolds numbers
چکیده انگلیسی

Galloping of square cylinders is studied at low values of the Reynolds number using a two-dimensional finite element method. A sinusoidal quasi-steady model allows determination of the occurrence of galloping and its amplitude. Parameters of this model are obtained via FEM unsteady simulations at different angles of incidence between 0° and 10°. The model efficiency is validated by comparing its predictions to those of unsteady simulations of fluid–structure interaction of a spring mounted square constrained to move in the direction transverse to the flow. Results show that the model yields good predictions of both the onset of galloping and its amplitude as a function of the Reynolds number at high values of the mass ratio. However, the quasi-steady model fails to reproduce the sudden change of amplitudes observed in finite element simulations at mass ratios below a critical value. Modifications to the model are introduced to reproduce this low mass ratio effect.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 28, January 2012, Pages 232–243
نویسندگان
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