Paper Title :Surface Pressure Variation Around Obstacle With Changing The Aspect Ratio
Author :Youngtae Lee, Heechang Lim
Article Citation :Youngtae Lee ,Heechang Lim ,
(2017 ) " Surface Pressure Variation Around Obstacle With Changing The Aspect Ratio " ,
International Journal of Mechanical and Production Engineering (IJMPE) ,
pp. 26-29,
Volume-5,Issue-5
Abstract : The study aims to understand the surface pressure distribution around the bodies such as the suction pressure in
the leading edge on the top and side-face when the aspect ratio of bodies and the wind direction are changed, respectively.
We carried out the wind tunnel measurement and numerical simulation around a series of rectangular bodies (40d×80w×80h,
80d×80w×80h, 160d×80w×80h, 80d×40w×80h and 80d×160w×80h in mm3) placed in a deep turbulent boundary layer.
Based on a modern numerical platform, the Navier-Stokes equation with the typical 2-equation (k-ε model) and the DES
(Detached Eddy Simulation) turbulence model has been calculated, and they are both compared with the measurement data.
Regarding to the turbulence model, the DES model makes a better prediction comparing with the k-ε model, especially when
calculating the separated turbulent flow around a bluff body with sharp edged corner. The result shows that the transverse
width has a substantial effect on the variation of surface pressure around the bodies, while the longitudinal length has little or
no influence.
Keywords: Rectangular bodies, aspect ratio, surface pressure distribution, wind-tunnel measurement, CFD.
Type : Research paper
Published : Volume-5,Issue-5
DOIONLINE NO - IJMPE-IRAJ-DOIONLINE-8092
View Here
Copyright: © Institute of Research and Journals
|
|
| |
|
PDF |
| |
Viewed - 59 |
| |
Published on 2017-07-14 |
|