بررسی عددی اثر صدمه ناشی از اصابت گلوله بر روی بال هواپیما

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی، دانشگاه امام علی (ع)

2 دانشکده مهندسی، دانشگاه امام علی

3 پژوهشکده هوافضا، تهران، ایران

چکیده

در پژوهش حاضر، با استفاده از نرم‌افزارAnsys-Fluent،شبیه‌سازیسه‌بعدی جریان عبوری از روی دو نمونه بال سالم و بالآسیب‌دیده ستاره­ای شکل ناشی از اصابت گلوله با فرض جریان ناپایا، تراکم- ناپذیر و لزج صورت گرفت تا اثرات ناشی از وجود آسیب روی بال بر روی ضرایب و عملکرد آیرودینامیکی مانند ضرایب برآ و پسا مشاهده گردد. جهت انجام این مطالعه برای بال متشکل از ایرفویل مقدار عدد رینولدز برابر با در نظر گرفته شده است. پس از شبکه‌بندیو استقلال حل از شبکه، اعتبارسنجی نتایج صورت گرفته است. به‌دلیل آشفته بودن رژیم جریان، جهت بررسی دقیق مساله در نزدیک دیواره و لایه­های خارجی از مدل توربولانسی استفاده شده است. نوآوری تحقیق حاضر، علاوه بر مدل توربولانسیاشاره شده، از مدل­های توربولانسی و  نیز جهت شبیه‌سازی مساله استفاده گردیده و به بررسی تفاوت­های ناشی از به‌کارگیری آنان پرداخته شده است. نتایج عددی با نتایج معتبر موجود اعتبارسنجی شده و تطابق خوبی بین این دو مشاهده گردید. سپس نتایج عددی حاصل نشان می­دهند که صدمه ستاره­ای روی بال منجر به کاهش نیروی برآ، افزایش نیروی پسا و در نتیجه کاهش عملکرد آیرودینامیکی بال می­گردد. همچنین نتایج نشان دادند که با افزایش زاویه حمله، صدمه ستاره­ای روی بال به شدت نیروی پسا را افزایش و نیروی برآ را کاهش می­دهد.

کلیدواژه‌ها

عنوان مقاله [English]

Numerical study of destruction effects due to collision of bullet on airplane wing

نویسندگان [English]

  • amirhamzeh farajollahi 1
  • ali asghar naderi 2
  • Mohsen rostami 2
  • mohammaz reza salimi 3
1 Department of Engineering, Imam Ali University, Tehran, Iran
2 Department of Engineering, Imam Ali University
3 Astronautical Systems Research Institute Aerospace Research
چکیده [English]

In the present research, studies were conducted by a three-dimensional simulation of fluid flow passing around both an undamaged wing and a wing damaged by a bullet (namely a star-shaped damaged wing), using the Ansys-Fluent numerical software. We assumed a viscous, unsteady and incompressible flow to observe the effects of wing damage on aerodynamic performance and coefficients such as the lift and drag coefficients. In order to conduct the study, for the wing consisting of  airfoil, the Reynolds number  value was considered equal to . After meshing and gaining grid independency, the results were validated. Due to the turbulence of the flow regime, we have used the  turbulence model to properly investigate the problem near the wall and outer layers. As a novelty in the present study, in addition to the mentioned model, and turbulence models have also been used to simulate the problem and examine the differences resulting from their usage. The numerical results were validated with the valid results available, as a good agreement was observed. The numerical results show that a star-shaped damaged in the wing leads to reducing the lift force, increasing the drag forces and thus reducing the aerodynamic performance of the wing. Also, the results show that by increasing the angle of attack, a severe star-shaped damage on the wing reduces the lift forces and increases the drag forces.

کلیدواژه‌ها [English]

  • Bullet shot
  • Aircraft wing
  • Numerical simulation
  • Star shape model

مراجع

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سابقه مقاله

  • تاریخ دریافت: 09 اسفند 1399
  • تاریخ بازنگری: 27 اسفند 1399
  • تاریخ پذیرش: 21 فروردین 1400
  • تاریخ انتشار: 08 آذر 1400

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