کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6756954 1431091 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study on mitigating vortex-induced vibration of a bridge by using passive vortex generators
ترجمه فارسی عنوان
بررسی تجربی بر کاهش ارتعاش ناشی از گردابی یک پل با استفاده از ژنراتورهای گرداب منفعل
کلمات کلیدی
ژنراتور گرداب منفعل، ارتعاش ناشی از باد پل کنترل سه بعدی سه بعدی، آزمون تونل باد، ریختن وورث،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
It has been reported that three-dimensional spanwise-varying control is very efficient in suppressing vortex shedding behind bluff bodies. Therefore, a new passive control method, spanwise-varying passive vortex generator (PVG), was proposed to mitigate the vortex-induced-vibration (VIV) of a bridge. The PVGs can directly generate streamwise vortices, which behave like secondary wake instability modes (3D instability modes). Therefore, the PVGs can cause 3D instability of spanwise vortex shedding and suppress VIV. In this study, isolated PVGs were arranged on the lower surface of the bridge in spanwise direction, and their control effects on mitigating VIV were investigated through wind tunnel tests. The results show that as PVGs are arranged with spanwise distance of 1-3H (H is the height of the bridge) and the PVG height is 0.1-0.25H, both vertical and torsional VIV can be completely suppressed, and the trailing edge is the key region to suppress VIV. Further, the control effects of PVG are barely influenced by the boundary layer of the bridge. The spectrum analysis of the wake velocity shows that the PVG can completely suppress the vortex shedding near a wake, and thereby resulting in the vanishing of VIV.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 175, April 2018, Pages 100-110
نویسندگان
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