کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7176101 1466598 2014 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Large-eddy simulation of the flow normal to a flat plate including corner effects at a high Reynolds number
ترجمه فارسی عنوان
شبیه سازی جریان بزرگ به جریان عادی به یک صفحه تخت از جمله اثرات زاویه ای در یک رینولدز بالا
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
Numerical investigations of the flow normal to a flat plate with the thickness ratio (thickness/height) of 0.02 have been carried out using three-dimensional large-eddy simulations (LESs). The Reynolds number (Re) based on the height of the plate (H) is 1.5×105. The plate corners are rounded with the curvatures of two different radii, i.e. r=0.01H and 0.005H. A low-frequency unsteadiness is indicated in the flow patterns and the flow switches alternately between the high and low drag regimes. This flow regime switch is more frequent in the sharp corner case (r=0.005H) than that in the smooth corner case (r=0.01H). The sharp corners complicate the flow pattern, increase the mean drag and the fluctuations of drag and lift forces on the plate, as well as the kinetic energy in the near wake. The instantaneous drag force is found to be reversely related to the instantaneous spanwise averaged recirculation length. The pressure and friction force components, Reynolds-averaged statistics distributions and the turbulent wake structures are also presented and discussed systematically.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 49, August 2014, Pages 149-169
نویسندگان
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