محاسبه نویز حول هندسه‌های دوبعدی ایرفویل با استفاده از یک روش تئوری کارآمد

نوع مقاله : مقاله پژوهشی

نویسنده

گروه مهندسی هوافضا، دانشکده فناوری های نوین و مهندسی هوافضا، دانشگاه شهید بهشتی، تهران، ایران

چکیده

در این تحقیق، یک الگوریتم عددی مؤثر و کارآمد بر پایه روش­های تئوری محاسبه نوفه[i] در جریان­های آیرودینامیکی حول هندسه­های دوبعدی ارائه می­شود. در این راستا، روش­های تئوری برای تخمین انواع نوفه حاصل از اندرکنش جریان با سطح مقطع ایرفویل آورده شده و نحوه تعمیم آنها به مدل­سازی نوفه کلی جریان ارائه شده است. معادلات حاکم استخراج شده و یک حل‌گر عددی آکوستیک برای مقاطع دوبعدی توسعه داده شده است. با استفاده از این حل‌گر، میدان جریان و اکوستیک حول دو هندسه مرجع دوبعدی شبیه­سازی شده و نتایج به­دست آمده گزارش شده­اند. نتایج به­دست آمده از حل‌گر حاضر برای شبیه­سازی و تحلیل نوفه حول بال­های شبه سه بعدی با دو هندسه ایرفویل NACA0012 و S822 و مقایسه آنها با نتایج تجربی و عددی نشان می­دهند که این حل‌گر با دقت خوب و سرعت اجرای بالا، قابلیت تعیین مشخصات آیرواکوستیکی را در هندسه­های دوبعدی/ شبه ­سه بعدی به خوبی دارا است.



[i]. Noise

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Noise prediction around two-dimensional airfoils using an efficient theoretical algorithm

نویسنده [English]

  • Eslam Ezzatneshan
Aerospace Engineering Group,, Faculty of New Technologies and Aerospace Engineering, Shahid Beheshti University, tehran, Iran
چکیده [English]

In the present study, an efficient numerical algorithm based on theoretical methods is developed for the prediction of the noise of aerodynamic flows around two-dimensional geometries. The theoretical formulation for calculating different types of noise is proofed and a solver with a negligible computational cost is developed accordingly. By using the present noise solver, the aeroacoustic characteristics around two test cases are predicted and the obtained results are presented in comparison with the available numerical and experimental data. The present results for noise around NACA0012 and S822 are in excellent agreement with those reported in the literature which shows the accuracy and performance of the present solver based on the theoretical formulation. Employing this quick solver is very crucial to save costs in the preliminary design process of low noise geometries in aerospace engineering. The extension of the present two-dimensional noise solver for the prediction of noise properties around three-dimensional geometries is undergoing.

کلیدواژه‌ها [English]

  • Theoretical methods
  • Noise prediction
  • two-dimensional geometries
  • Airfoil
  • algorithm validation

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