تحلیل جریان با عمق محدود حول هیدروفویل‌های دوبعدی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه مکانیک دانشگاه فردوسی مشهد

2 دانشجوی گروه مکانیک دانشگاه فردوسی مشهد

3 Mashhad, p.o. box 91775-1111, Iran

چکیده

بررسی پارامترهای هیدرودینامیکی اجسام در حال حرکت و کاملاً غوطه‌ور در سیال به‌منظور شناخت اثرات سرعت، انحنا، ضخامت و زاویه حمله هیدروفویل از سال‌ها پیش و با روش‌های مختلف انجام می‌گیرد. نرم‌افزار محاسباتی فلوئنت امکان حل معادلات حاکم با استفاده از روش VOF برای شبیه‌سازی جریان دوفازی آب و هوا را به‌خوبی فراهم کرده است. مدل آشفتگی استفاده‌شده در این تحقیق نیز، مدل آشفتگی رینولدز RSM است که عموماً مدلی دقیق‌تر می‌باشد. در مطالعه‌ حاضر، اثرات سطح آزاد و کف محدود بر روی هیدروفویل‌های غوطه‌ور به‌طور هم‌زمان بررسی شده و نتایج حاصل با نتایج به‌دست‌آمده از روش المان مرزی، مقایسه شده است. نتایج نشان می‌دهد هیدروفویلی که در عمق بیشتری قرار گرفته، دارای ضرایب برآ و پسای بالاتر و نسبت برآ به پسای بیشتری است. هم‌چنین در آب‌های کم‌عمق هیدروفویل‌های با انحنای بیشتر و زاویه‌ حمله‌ کمتر از عملکرد بهتری برخوردارند و امواج پایین‌دست جریان زودتر میرا می‌شوند.

کلیدواژه‌ها


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