کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5017376 | 1466575 | 2017 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural response and energy extraction of a fully passive flapping foil
ترجمه فارسی عنوان
پاسخ ساختاری و استخراج انرژی یک فویل فلپ کاملا غیرفعال
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کلمات کلیدی
فلاپ فلاپ، استخراج انرژی، ارتعاش ناشی از جریان،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
The structural response and energy extraction of a foil undergoing two-degree-of-freedom fully passive flapping motions in a two-dimensional flow are numerically investigated at Re=400. The simulations of the fluid-structure interaction were conducted using the Immersed Boundary Method (IB Method). In the parametric space of flow reduced velocity and pivot location investigated, five response regimes are identified. This paper focuses on the stable synchronisation regime, which is characterised by harmonic wake-body synchronisation with stable large-amplitude oscillations. Correspondingly, a novel wake pattern composed of a triplet of vortices and a pair of vortices shed per cycle, referred to as T+P pattern, is encountered. An analysis of the dynamic nonlinearity showed that the inertia forces can induce perturbations in the form of harmonics to the dynamics of the system. Furthermore, the highest cycle-averaged power output coefficient and efficiency were found to be CÌP=0.95 and η=0.32, respectively. The present results suggest that high-efficiency case in fully passive flapping motions is associated with a large pitch-plunge phase and a 2S wake pattern composed of two strong single LEVs shed per cycle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 72, July 2017, Pages 96-113
Journal: Journal of Fluids and Structures - Volume 72, July 2017, Pages 96-113
نویسندگان
Zhuo Wang, Lin Du, Jisheng Zhao, Xiaofeng Sun,