EXPERIMENTAL STUDY OF FLOW CHARACT ERISTICS AROUND A CIRCULAR CYLINDER WITH DIFFERENT ICE PROFILES
An experimental study was carried out to investigate the effect of ice accretion on the flow characteristics of a circular cylinder. Variations of flow characteristics such as velocity field, turbulence intensity and vorticity were studied for different ice profiles. These characteristics were used to perform detailed flow field measurements to quantify the evolution of unsteady flows around a cylinder. In order to study the effects of ice, two configurations of the cylinder model were considered: clean profile, and profile with ice accretion shapes. The velocity field and turbulence statistics of the wake behind each cylinder were measured for Reynolds numbers based on a 38-mm cylinder diameter in the range of 2× 105 -1.2× 106. A Particle Image Velocimetry (PIV) system, using a laser technique to capture seeding particles was used to measure velocity on the clean and iced cylinders. The experimental results show large regions of separated flow even at low incidence and for moderate amounts of ice. The results of this study will be used as input data for numerical investigations on the effects of ice accretion on aerodynamic coefficients of bluff bodies.
H.Banitalebi Dehkordi M.Farzaneh P.Van Dyke
NSERC/Hydro-Quebec/UQAC Industrial Chair on Atmospheric Icing of Power Network Equipment (CIGELE) an Hydro-Quebec Research Institute (IREQ), Varennes, QC, Canada
国际会议
The 14th International Workshop on Atmospheric Icing of Structures(第十四届结构物大气覆冰国际研讨会 IWAIS 2011)
重庆
英文
83
2011-05-08（万方平台首次上网日期，不代表论文的发表时间）