نتایج جستجو برای: xfoil

تعداد نتایج: 36  

Journal: :Applied sciences 2021

Sustainability has become one of the most significant considerations in everyday work, including energy production. The fast-growing trend wind around world increased demand for efficient and optimized airfoils, which paved way harvesting systems. present manuscript proposes an aerodynamically design well-known existing NREL S809 airfoil performance enhancement blade turbines. An integrated cod...

Journal: :energy equipment and systems 2014
amir nejat mohammadreza abyanaki iman rahbari

wind turbines are important devices that extract clean energy from wind flow. the efficiency of wind turbines should be examined under various working conditions in order to estimate off-design performance. numerous aerodynamic and structural research works have been carried out to compute aeroelastic effects on wind turbines. most of them suffer from either the simplicity of the modelling appr...

A.R. Radmanesh M. Abbaspour M.R. Soltani

To indicate the best airfoil profile for different sections of a blade, five airfoils; included S8xx, FFA and AH series was studied. Among the most popular wind power blades for this application were selected, in order to find the optimum performance. Nowadays, modern wind turbines are using blades with multi airfoils at different sections. SST-K-ω model with different wind speed at large scale...

Amir Nejat, Iman Rahbari Mohammadreza Abyanaki

Wind turbines are important devices that extract clean energy from wind flow. The efficiency of wind turbines should be examined under various working conditions in order to estimate off-design performance. Numerous aerodynamic and structural research works have been carried out to compute aeroelastic effects on wind turbines. Most of them suffer from either the simplicity of the modelling appr...

Journal: :CFD Letters 2021

Progressive advancements in small to medium-sized fixed-wing UAVs call for prototype designing be fast, accurate, and economical. This requires the numerical assessment of airfoil performance based on high fidelity replication wind tunnel data. Furthermore, integration drag reduction techniques is attractive as improvements endurance, payload capacity carbon footprints can attained. Since a var...

ژورنال: :مهندسی مکانیک مدرس 2015
حمید معین فرد بهنام معتکف ایمانی مرتضی داودی امین رحیم زاده

مدل سازی دینامیکی تیرها تحت تاثیر نیروهای آیرودینامیکی در بسیاری از شاخه های مهندسی از اهمیت بالایی برخوردار است. در این مقاله روش جدیدی برای مدل سازی حوزه ی زمان تیرهای یکسرگیردار با خواص هندسی و فیزیکی متغیر در طول تیر، تحت تحریک جریان باد ارائه می شود. در ابتدا با استفاده از اصل همیلتون و با فرض تئوری اویلر-برنولی معادله دیفرانسیل با مشتق جزئی حرکت تیرِ با مقطع متغیر استخراج می گردد. در ادامه...

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