کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
293034 511100 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation of tornado-like vortex dynamics with swirl ratio: The mean and turbulent flow fields
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Experimental investigation of tornado-like vortex dynamics with swirl ratio: The mean and turbulent flow fields
چکیده انگلیسی

An experimental simulation of tornado-like vortices is conducted in a small tornado vortex simulator in order to study the effect of swirl ratio on flow characteristics. Particle Image Velocimetry (PIV) method is employed to quantitatively determine the tornado-vortex velocity field for swirl ratios ranging from 0.08 to 1. The radial and tangential components of velocity as well as the core radius of the tornado increase with increase in swirl ratio. The location of the maximum radial and tangential velocities is adjacent to the ground where the tornado vortex interacts with the surface. The values of normal and shear turbulent stresses indicate the existence of a laminar core for small swirl. As expected the shear stresses increase with swirl ratio as the vortex becomes turbulent. The highest turbulent production corresponds to the critical case of vortex touchdown.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 98, Issue 12, December 2010, Pages 936–944
نویسندگان
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