فناوری در مهندسی هوافضا

فناوری در مهندسی هوافضا

طراحی و ساخت ریز ایرفویل هوشمند با استفاده از تغییر شکل سطحی و بررسی تجربی خواص آیرودینامیکی

نوع مقاله : علمی پژوهشی

نویسنده
استادیار، دانشکده مهندسی مکانیک، دانشگاه صنعتی شاهرود، شاهرود، ایران
چکیده
در این مقاله، به مسئله سازه‌های تغییر شکل پذیر در راستای تغییر انحنای یک ایرفویل متقارن به‌صورت هوشمند و همچنین بررسی نیروهای آیرودینامیکی درون تونل باد در ابعاد مینیاتوری به‌صورت تجربی پرداخته شد‌ه‌است. نوآوری و مسئله موردنظر در این مقاله، بررسی اثر تغییر شکل سطحی در یک ریز ایرفویل در یک تونل باد مینیاتوری با قابلیت سنجش کل نیروی برآ و درگ به‌صورت هوشمند و همچنین قابلیت تصمیم‌گیری جهت میزان انحنا می‌باشد. در این مطالعه، چگونگی سنجش میزان برآ موجود و ایجاد تغییر شکل به‌وسیله میزان انحنا، توانایی ثابت نگه‌داشتن نیروی برآ حتی در شرایط واماندگی یک ایرفویل ساده بررسی ‌‌شده‌است. به‌منظور صحت‌سنجی تونل، یک صفحه تخت و همچنین یک ایرفویل ساده در محفظه آزمون تونل باد مینیاتوری مورد بررسی قرار گرفته است و نتایج تجربی با نتایج موجود با خطای کمتر از 10 درصد گزارش ‌‌شده‌است. نمونه ایرفویل‌های انتخابی ریز ایرفویل‌ها، ساده (غیر مورفینگ) و نمونه دیگر به‌صورت هوشمند (مورفینگ) می‌باشد. جنس سازه انتخابی برای هر دو نمونه ریز ایرفویل‌ها، چوب بالسا بوده و برای پوسته از روکش حرارتی استفاده ‌‌شده‌است. در طراحی ریز ایرفویل هوشمند، سازه به دو بخش قسمت ثابت (بخش ابتدایی سازه) و قسمت متحرک (بخش انتهایی سازه) تقسیم می‌شود که جنس هر دو بخش از چوب بالسا بوده و روکش حرارتی به‌عنوان پوسته انتخاب گردیده است. عملکرد ریز ایرفویل هوشمند از طریق فرمانی می‌باشد که میکروکنترلر باتوجه به حسگرهای کرنش‌سنج و فشارسنج به موتور الکتریکی سرو جهت حرکت ‌بخش متحرک صادر می‌کند. بااستفاده از حسگرها و مدارات الکتریکی، امکان تغییر در انحنای ایرفویل به کمک موتور سرو جهت تغییر در میزان برآ به وجود آمده است و میزان برآ را می‌توان بر روی مقدار موردنظر (در این مقاله 16 گرم) ثابت نگه داشت.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Design and Fabrication of Smart Small Airfoil Using Surface Deformation and Experimental Study of Aerodynamic Properties

نویسنده English

Ramin Zakeri
Assistant Professor, Faculty of Mechanical Engineering, Shahrood University of Technology, Shahrood. Iran
چکیده English

In this article, the case of deformable structures in order to change the curvature of a symmetrical airfoil in a Smart way and also the investigation of the aerodynamic forces inside the wind tunnel in miniature dimensions have been discussed experimentally. The innovation and problem in this article are to investigate the effect of surface deformation in a micro airfoil in a miniature wind tunnel with the ability to measure the total lift and drag force intelligently and the ability to decide on the degree of curvature. In this study, how to measure the amount of available drag and change the shape by the amount of curvature, the ability to keep the drag force constant even in the condition of stalling of a simple airfoil has been investigated. In order to validate the tunnel, a flat plate as well as a simple airfoil has been investigated in the miniature wind tunnel test chamber, and the experimental results are reported with the existing results with an error of less than 10%. The example of selected airfoils is micro airfoils, simple (non-morphing) and another example is smart (morphing). The selected structure material for both micro airfoil samples is balsa wood and thermal coating is used for the shell. In the smart micro airfoil design, the structure is divided into two parts: the fixed part (the beginning part of the structure) and the moving part (the end part of the structure). The function of the smart micro airfoil is through the command that the microcontroller issues to the servo electric motor according to the strain gauge and pressure gauge sensors to move the moving part. By using sensors and electrical circuits, it is possible to change the curvature of the airfoil with the help of a servo motor to change the amount of airfoil, and the amount of airfoil can be kept constant at the desired value (in this article, 16 grams).

کلیدواژه‌ها English

Morphing Theory
Smart Small Airfoil
Miniature Wind Tunnel
Lift and Drag Force
Strain Gauge Sensors
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  • تاریخ دریافت 01 آذر 1401
  • تاریخ بازنگری 14 اردیبهشت 1402
  • تاریخ پذیرش 16 اردیبهشت 1402
  • تاریخ اولین انتشار 16 اردیبهشت 1402