بررسی عددی رفتار توربین بادی ترکیبی متشکل از پره‌های نوع باخ به عنوان روتور داخلی

اسدی, محمد; حسن زاده, رحیم

بررسی عددی رفتار توربین بادی ترکیبی متشکل از پره‌های نوع باخ به عنوان روتور داخلی

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ دکتری،دانشگاه صنعتی ارومیه،ارومیه، ایران

² دکتری ،دانشگاه صنعتی ارومیه،ارومیه، ایران

چکیده

در این مقاله، نوع جدیدی از توربین‌های بادی محور عمودی ترکیبی معرفی شده و رفتار آیرودینامیکی آن با کمک دینامیک سیالات محاسباتی مورد ارزیابی قرار گرفته است. در ساختار روتور مورد بررسی، از پره‌های نوع باخ به عنوان روتور داخلی استفاده شده است. جریان در میدان محاسباتی به صورت تراکم‌ناپذیر ، ناپایا و آشفته است. علاوه بر آن، برای مدل‌سازی تنش رینولدز از روش آشفتگی SST k- استفاده شده است. هدف از این تحقیق، ارائه شرایط عملکردی مناسب برای روتور مورد مطالعه می‌باشد. در این راستا، عملکرد روتور و ضریب توان توربین بادی ترکیبی در نسبت سرعت نوک (TSR) 5/3 ،5/2 و 5/1 و سرعت آزاد باد (U) 5 و 10 متر برثانیه و زاویای اتصال (φ)o0، o45 و o90 مورد بررسی قرار گرفته است. نتایج به‌دست آمده نشان دادند که با افزایش مقدار TSR میدان سرعت و ورتیسیته داخل روتور به ترتیب ضعیفتر و قوی‌تر شده و مساحت ناحیه مرده گسترش یافته است. همچنین، مقدار φ با ضریب توان رابطه مستقیم داشته، به گونه‌ای که با افزایش مقدار φ، ضریب توان روتور افزایش یافته است. از سوی دیگر، بیشترین توان در شرایط 5/1 = TSR، o90 =φ و m/s 10 =U تولید شده و مقدار آن برابر 39/0 است.

کلیدواژه‌ها

20.1001.1.23223278.1403.13.1.5.1

عنوان مقاله [English]

Numerical investigation of the behavior of hybrid wind turbine consisting of Bach type blades as internal rotor

نویسندگان [English]

Mohammad Asadi ¹
Rahim Hassanzadeh ²

¹ Ph.D., Urmia University of Technology, Urmia, Iran

² Ph.D., Urmia University of Technology, Urmia, Iran

چکیده [English]

In this article, a new type of hybrid vertical axis wind turbines is introduced and its aerodynamic behavior is evaluated with the help of Computational Fluid Dynamics. In the investigated rotor structure, Bach-type blades are used as the inner rotor. The flow in the computational domain is incompressible, unsteady and turbulent. Beyond that, SST k- turbulence method is used to model the Reynolds stress. The purpose of this research is to provide suitable performance conditions for the studied rotor. In this regard, the performance of the rotor and the power coefficient of the hybrid wind turbine in tip speed ratio (TSR) of 3.5, 2.5, and 1.5 and free wind speed (U) of 5 and 10 m/s and attachment angles(φ) of 0˚, 45˚ and 90˚ are investigated. The obtained results showed that with increasing TSR value, the velocity and vorticity field inside the rotor became weaker and stronger respectively and the area of the dead band expanded. In addition, the value of φ has a direct relationship with the power coefficient, in such a way that with the increasing of the value of φ, the power coefficient of the rotor has increased. On the other hand, the maximum power is produced in the conditions of TSR = 1.5, φ = 90˚ and U = 10 m/s and its value is 0.39.

کلیدواژه‌ها [English]

Vertical axis wind turbine
Savonius
Darrieus
Dead band.Power coefficient

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