کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5476365 | 1521430 | 2017 | 46 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Analytical and numerical investigation of unsteady wind for enhanced energy capture in a fluctuating free-stream
ترجمه فارسی عنوان
بررسی تحلیلی و عددی از باد بی ثبات برای افزایش جذب انرژی در جریان آزاد نوسان
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
چکیده انگلیسی
Unsteady wind is characterized by low energy content and large fluctuations. A Computational Fluid Dynamics (CFD)-based method for capturing wind energy in a fluctuating free-stream, supported by analytical formulations, is investigated in this paper. We implemented unsteady Reynolds-Averaged Navier-Stokes (RANS) solver to control the dynamic mesh motion. Using an urban wind resource, characteristic fluctuation frequencies at 0.5Â Hz, 1.0Â Hz, and 2.0Â Hz have been selected to demonstrate the enhanced wind energy capture. The numerical energy coefficient marginally changed from 0.36Â at 0.5Â Hz to 0.37Â at both 1Â Hz and 2Â Hz cases. The results reveal that the highest frequency of fluctuation with meaningful energy content in unsteady wind condition is â1Â Hz. The study findings promote our understanding about the energy associated with short-period fluctuations reflecting realistic unsteady wind environment. Additionally, the present study approach to analyze wind energy capture on a H-Darrieus wind rotor in a fluctuating free-stream can be extrapolated to other slightly complex VAWT configurations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 121, 15 February 2017, Pages 854-864
Journal: Energy - Volume 121, 15 February 2017, Pages 854-864
نویسندگان
David Wafula Wekesa, Cong Wang, Yingjie Wei, Louis Angelo M. Danao,