مطالعه عددی بهبود عملکرد آیرودینامیکی ابزار برآافزا در ایرفویل دو المانی

علوم کاربردی و محاسباتی در مکانیک

مقاله 3، دوره 35، شماره 1 - شماره پیاپی 31، اسفند 1401، صفحه 37-52   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/jacsm.2022.79293.1142

نویسندگان

میثم ایزدی¹؛ سید آرش سید شمس طالقانی^{* 2}؛ رضا خاکی³

¹دانشجوی دکتری پژوهشگاه هوافضا

²عضو هیات علمی پژوهشگاه هوافضا

³دانشیار، دانشگاه علوم و فنون هوایی شهید ستاری

چکیده

هدف از این تحقیق بهبود عملکرد آیرودینامیکی ایرفویل ناکا-23012 مجهز به ابزار برآافزای لبه فرار با تغییر در پارامترهای هندسی آن است. در این تحقیق حل معادلات ناویر-استوکس در شرایط جریان آشفته و تراکم‌ناپذیر با بهره‌گیری از نرم‌افزار فلوئنت صورت پذیرفته است. بعد از فرایند مدلسازی ایرفویل و فلپ در زوایای فلپ متفاوت (5 الی 30 درجه)، شبکه‌بندی بی ‌سازمان در نرم‌افزار گمبیت تولید شد و بهبود عملکرد آیرودینامیکی ناشی از تغییرات ایجاد شده در پارامترهای هندسی مورد بررسی قرار گرفت. جریان از نوع دائم، متلاطم و تراکم‌ناپذیر فرض شده و الگوریتم حل معادلات نیز فشار مبنا انتخاب شده است. محدوده عدد رینولدز جریان 10⁶´6/3 بوده و مدل آشفتگی مورد استفاده کا-اپسیلون در نظر گرفته شده است. مقایسه نتایج و مشخصه­های آیرودینامیکی ایرفویل مجهز به فلپ پس از ایجاد تغییرات در پارامترهای هندسی در نرم‌افزار فلوئنت، نشان می‌دهد که ضرایب آیرودینامیکی به صورت قابل ملاحظه­ای (حدود 15%) بهبود یافته و همچنین جدایش جریان، به سمت انتهای فلپ جابه‌جا شده است. همچنین بررسی گرادیانهای فشار و سرعت در مقاطع مختلف، نشان می‌دهند که تغییرات بسیار مؤثر بوده و در مقایسه با مقاله مرجع توزیع بهتری صورت پذیرفته است.

کلیدواژه‌ها

ابزار برآافزا؛ فلپ‌های تک‌شکافه؛ پارامترهای هندسی فلپ؛ عملکرد آیرودینامیکی

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