کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1731648 | 1016095 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel twin-rotor radial-inflow air turbine for oscillating-water-column wave energy converters
ترجمه فارسی عنوان
توربین هوای ورودی دوگانه جدید دوگانه را برای مبدل های انرژی موج ستون آب نواری
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کلمات کلیدی
توربین هوا، انرژی موج، نوسان ستون آب شبیه سازی عددی، آیرودینامیک،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
چکیده انگلیسی
A novel air turbine for bidirectional flows in oscillating-water-column wave energy converters is presented and its performance is analyzed. The turbine is based on a pair of conventional radial-inflow rotors mounted on the same shaft, complemented by the corresponding guide vane rows, by a curved-duct manifold arranged circumferentially in a period manner and by a two-position cylindrical valve. Numerical values of the performance of the whole machine were obtained from published experimental data of the flow through a conventional radial-inflow gas turbine, together with CFD (computational fluid dynamics) results for aerodynamic losses in the curved duct manifold. Four different geometries, combined with five different sizes, of the curved-duct manifold were numerically simulated. Windage losses, that occur at the inactive rotor and are inherent to the machine conception, were found to be a major loss. A peak value of about 86% was obtained for the overall efficiency of the machine. Comparisons are presented between the new turbine and the biradial turbine (sliding guide-vanes version), the latter being possibly the most efficient self-rectifying turbine model-tested so far. The new turbine was found to be more efficient, both in peak instantaneous efficiency and in maximum average efficiency in random waves, by a margin of about 8%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 93, Part 2, 15 December 2015, Pages 2116-2125
Journal: Energy - Volume 93, Part 2, 15 December 2015, Pages 2116-2125
نویسندگان
António F.O. Falcão, LuÃs M.C. Gato, João C.C. Henriques, João E. Borges, Bruno Pereiras, Francisco Castro,