کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6691169 | 501908 | 2014 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A numerical investigation into the influence of unsteady wind on the performance and aerodynamics of a vertical axis wind turbine
ترجمه فارسی عنوان
تحقیقات عددی در مورد تاثیر باد ناپایدار بر عملکرد و آیرودینامیک یک توربین بادی عمودی محور
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Very detailed understandings of the flow physics are discussed showing the importance of stall and flow re-attachment on the performance of the turbine with unsteady winds. The three blades of the VAWT experience very different flow regimes as they rotate during a single periodic oscillation of the wind speed. When the VAWT operates in periodically fluctuating wind conditions, overall performance slightly improves if the following are satisfied: the mean tip speed ratio is just above the λ of the steady performance maximum, the amplitude of fluctuation is small (<10%), and the frequency of fluctuation is high (>1 Hz). Operation at a mean λ that is lower than λ for peak performance coefficient causes the VAWT to run in the λ band with deep stall and vortex shedding, to the detriment of the VAWT performance coefficient. Large fluctuations in wind speed causes the VAWT to run in λ conditions that are drag dominated, thus reducing the performance of the wind turbine. Within realistic conditions, higher frequencies of fluctuation marginally improve the performance of the VAWT.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 116, 1 March 2014, Pages 111-124
Journal: Applied Energy - Volume 116, 1 March 2014, Pages 111-124
نویسندگان
Louis Angelo Danao, Jonathan Edwards, Okeoghene Eboibi, Robert Howell,