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بررسی عددی پدیدهی دنباله در توربینهای دو و سهپرهی جریان جزر و مدی | ||
مهندسی مکانیک دانشگاه تبریز | ||
مقاله 40، دوره 52، شماره 2 - شماره پیاپی 99، مرداد 1401، صفحه 371-380 اصل مقاله (782.04 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/jmeut.2022.44390.2837 | ||
نویسندگان | ||
روزبه علی پور* 1؛ رامین علی پور2 | ||
1استادیار، گروه مهندسی مکانیک، واحد ماهشهر، دانشگاه آزاد اسلامی، ماهشهر، ایران | ||
2دستیار تحقیق، گروه مهندسی مکانیک، واحد ماهشهر، دانشگاه آزاد اسلامی، ماهشهر، ایران | ||
چکیده | ||
در این مقاله پدیده دنباله، در توربینهای جریان جزر و مدی دو پره و سه پره مورد بررسی قرار گرفته است. جهت تحلیل، از روش دینامیک سیالات محاسباتی در قالب نرمافزار ANSYS-FLUENT استفاده شده است. در ابتدا، توربینها در مقادیر مختلف سرعت نسبی نوک پره مورد ارزیابی قرار گرفتند و بیشینه توان تولیدی آن ها محاسبه گردید. سپس، ناحیه دنباله برای شرایط بیشینه توان تولیدی مورد ارزیابی قرار گرفت. نتایج نشان داد که در سرعت نسبی نوک پره برابر با 5، بیشینه ضریب توان برای هر دو توربین قابل استحصال است که مقدار آن برای توربین سه پره معادل با 35/0 و برای توربین دو پره برابر با 28/0 می باشد. همچنین، پدیده دنباله در توربین های دو پره نسبت به توربین سه پره زودتر به پایان می رسد به گونه ای که؛ در فاصله ای معادل با سیزده برابر قطر توربین نسبت به محل قرارگیری آن، مقدار سرعت برای توربین دو پره به 87% سرعت اولیه و برای توربین سه پره به 81% سرعت اولیه خود بازگشته است. بنابراین، با در نظر گرفتن توان تولیدی بالاتری که از توربینهای سه پره قابل استحصال است، زمانی که مساحت به کار گرفته شده به منظور ایجاد مزرعه اهمیت کمتری داشته باشد، میتوان با چیدمان سه پره توان بیشتری را از مزرعه برداشت کرد. بالعکس، زمانی که مساحت مزرعه از اهمیت خاصی برخوردار باشد، توربینهای دو پره برای استفاده مناسب تر به نظر می رسند. | ||
کلیدواژهها | ||
توربین؛ جریان جزر و مدی؛ پدیده دنباله؛ دینامیک سیالات محاسباتی؛ سرعت نسبی نوک پره؛ ضریب توان | ||
مراجع | ||
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