نتایج جستجو برای: naca

تعداد نتایج: 757  

Journal: :IOP Conference Series: Materials Science and Engineering 2021

Journal: :Journal of engineering advancements 2021

This paper presents a two-dimensional Computational Fluid Dynamics (CFD) analysis on the effect of gurney flap NACA 4312 airfoil in subsonic flow. These numerical simulations were conducted for heights 1.5%, 1.75%, 2% and 3% chord length at fixed Reynold Number, Re (5×105) different angle attack (0o ~16o). ANSYS Fluent commercial software was used to conduct these simulations. The flow consider...

Journal: :International Journal Of Science, Technology & Management 2021

The horizontal axis wind turbine (HAWT) design with low speed requires blade geometry selection. analysis uses the potential flow panel method and integral boundary layer formulation to analyze around airfoil. element momentum (BEM) theory has an aerodynamic coefficient value along blade. Power calculates model shear pressure at each This research aims determine rotor based on performance, incl...

Journal: :Blood 2000
S Baghdoyan P Dubreuil F Eberlé S Gomez

We have developed a gene trap approach to select specific cytokine receptor/ligand responsive genes in the cell line TF-1. This cell line exhibits a dependency on granulocyte-macrophage colony-stimulating factor (GM-CSF) or interleukin-3 (IL-3) and responds to interleukin-5 (IL-5). In an attempt to detect genes modulated by one of these factors, cells were infected with the Rosabetageo retrovir...

Journal: :International maritime health 2010
Jan Norum

BACKGROUND Air ambulance operations in the Arctic have to deal with remote locations, long distances, rough weather conditions, seasonable darkness, and almost no alternative for landing. Despite these challenges, people expect high quality, specialist health care. OBJECTIVE This study aimed to analyse air ambulance operations due to cardiovascular disease (CVD) in the Arctic and employ the r...

ژورنال: مهندسی هوانوردی 2014
دوست‌محمودی, علیرضا, فولادی, مجتبی, میرزایی, مسعود, پوریوسفی, غلامحسین,

سوانح هوانوردی که در چند سال اخیر در اثر یخ‌زدگی بال هواپیما رخ داده‌اند، لزوم بررسی این پدیده را آشکار می‌سازد. در این مقاله، ایرفویل NACA23012، به علت کاربرد فراوان در هوانوردی عمومی و تأثیر شدید یخ‌زدگی بر آن، مورد مطالعه قرار گرفته است. به منظور بررسی اثرات پدیده یخ‌زدگی، آزمایشات در عدد رینولدز  در محدوده زوایای حمله 8- تا 22 درجه، بر روی ایرفویل‌های بدون یخ، یخ شاخی‌شکل و یخ انباشته‌شده ...

2012
Altab Hossain Jakir Hossen A. K. M. P. Iqbal

The measurement of aerodynamic forces and moments acting on an aircraft model is important for the development of wind tunnel measurement technology to predict the performance of the full scale vehicle. The potentials of an aircraft model with and without winglet and aerodynamic characteristics with NACA wing No. 65-3218 have been studied using subsonic wind tunnel of 1 m × 1 m rectangular test...

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