کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9825046 | 1521505 | 2005 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Turbulent flow in a rectangular duct with a smooth-to-rough step change in surface roughness
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Turbulent flow in a rectangular duct with a smooth-to-rough step change in surface roughness Turbulent flow in a rectangular duct with a smooth-to-rough step change in surface roughness](/preview/png/9825046.png)
چکیده انگلیسی
Experimental study has been conducted on the response of turbulent flow in a rectangular duct to a smooth-to-rough step change in surface roughness on its short-side walls. The distributions of the primary flow velocity, secondary flow velocities, turbulence intensities, and turbulent shear stresses have been measured in seven cross-sections located from 2.0dh to 37.5dh downstream from the smooth-to-rough junction, and the relaxation process of this turbulent flow has been examined. It has been found that the relaxation process of this flow is considerably complex, but the flow characteristics except for the primary flow velocity in the core region as well as near the rough wall reach an almost equilibrium state, i.e., the fully developed rough-duct flow condition, within a distance of 37.5dh from the change in the surface roughness.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 30, Issues 2â4, FebruaryâMarch 2005, Pages 129-148
Journal: Energy - Volume 30, Issues 2â4, FebruaryâMarch 2005, Pages 129-148
نویسندگان
Naoya Maeda, Masafumi Hirota, Hideomi Fujita,