بررسی عددی تأثیر میله‌های بیضوی نصب‌شده با ضریب منظر متفاوت بر عملکرد توربین بادی ساونیوس

نوع مقاله : مقاله علمی

نویسندگان
میلاد مهرپویا 1
محمدجواد مغربی 2
1 کارشناسی ارشد، مهندسی مکانیک، دانشگاه فردوسی مشهد، مشهد، ایران
2 استاد، مهندسی مکانیک، دانشگاه فردوسی مشهد، مشهد، ایران
10.22034/stme.2025.549288.1172
چکیده
استفاده از انرژی باد به‌عنوان منبعی پاک و تجدیدپذیر در دهه‌های اخیر توجه بسیاری از محققان را به خود جلب کرده است. در میان انواع توربین‌های بادی، توربین بادی ساونیوس به دلیل سادگی ساخت و توانایی عملکرد در سرعت‌های پایین باد، گزینه‌ای مناسب برای استفاده در مقیاس کوچک محسوب می‌شود. یکی از مسائل مهم در طراحی این توربین‌ها، اثر میله‌های هدایت‌کننده بر میدان جریان و عملکرد آیرودینامیکی روتور است. در این پژوهش، اثر میله‌ بیضی‌شکل با نسبت منظری متفاوت بر عملکرد توربین ساونیوس برای بهبود توان توربین به‌صورت عددی و دوبعدی در نرم‌افزار انسیس فلوئنت بررسی‌شده است. شبیه‌سازی‌ها در حالت گذرا و با استفاده از مدل آشفتگی SSST K- انجام گرفت و اعتبارسنجی مدل از طریق مقایسه با داده‌های تجربی موجود صورت پذیرفت. نتایج نشان داد بیضی‌های با نسبت منظر بیشتر از 1 بهبود ضریب گشتاور و ضریب توان را سبب می‌شوند، به‌گونه‌ای که در نسبت منظر 2/1 بیشترین بهبود توان به‌اندازه 23 درصد مشاهده شد.
کلیدواژه‌ها
توربین بادی ساونیوس
بهبود توان
میله بیضی‌شکل
نسبت منظری متفاوت
موضوعات

عنوان مقاله English

Numerical Investigation of Elliptical Deflectors with Different Aspect Ratios on Aerodynamic Performance of a Savonius Wind Turbine

نویسندگان English

Milad Mehrpooya 1
Mohammad javad Maghrebi 2
1 M.S., Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
2 Professor, Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
چکیده English

Savonius wind turbines are attractive for small-scale wind energy applications because of their simple structure and ability to operate at low wind speeds. However, their aerodynamic efficiency is relatively low, mainly due to the negative torque generated by the returning blade. In this study, the effect of an elliptical supporting rod with different aspect ratios on the aerodynamic performance of a Savonius wind turbine was numerically investigated. Two-dimensional transient simulations were performed using ANSYS Fluent and the SST k–ω turbulence model. The numerical model was validated against available experimental data. Several elliptical aspect ratios and tip-speed ratios (TSRs) were considered, and the power coefficient was used as the main performance indicator. The results showed that elliptical supporting rods with aspect ratios greater than one generally improved turbine performance. The maximum improvement was obtained at an aspect ratio of 1.2, reaching approximately 24% compared with the reference configuration. The improvement became more significant at higher TSRs. However, increasing the aspect ratio beyond 1.3 reduced the performance because the supporting rod increasingly obstructed the incoming flow toward the advancing blade. The results demonstrate that optimizing the aspect ratio of the supporting rod can provide an effective approach for improving Savonius turbine performance.

کلیدواژه‌ها English

Savonius Wind Elliptical
Supporting RodSupporting Rod
Tip Speed Ratio
Aspect Ratio
Power Coefficient
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  • تاریخ دریافت 03 مهر 1404
  • تاریخ بازنگری 18 آبان 1404
  • تاریخ پذیرش 12 آذر 1404
  • تاریخ اولین انتشار 12 آذر 1404
  • تاریخ انتشار 01 مرداد 1405