بررسی پسای اصطکاکی در سکان مدل مجهز به میکروریبلت دندانه‌ای با مقطع NACA0025 با استفاده از شبیه سازی عددی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای تبدیل انرژی دانشگاه هرمزگان

2 گروه مکانیک دانشکده فنی دانشگاه هرمزگان

3 گروه مهندسی مکانیک دانشگکده فنی دانشگاه هرمزگان بندرعباس ایران

4 گروه مهندسی مکانیک دانشکده فنی دانشگاه هرمزگان

چکیده

چکیده:

بحران انرژی و آلودگی‌های زیست محیطی از چالش‌های مهمی است که بشر در عصر حاضر با آن روبرو است. روبه پیاین بودن انرژی‌های فسیلی نیز این اندیشیدن چاره‌ای برای این چالش‌ها را دوچندان می‌نماید. یکی از راه‌های کاهش مصرف انرژی پیدا کردن شناختن نیروی‌های مقاوم و راه‌های غلبه کردن بر آن‌ها می‌باشد. در صنعت حمل و نقل دریایی و جابجایی شناورها در دریا که بیش از 90 درصد حمل و نقل جهان را شامل می‌گردد، مقابله با نیروی مقاومی که بر شناورها و متعلقات آن از سوی آب وارد می‌شود. بررسی وضعیت کاهش پسا در متعلقات معمولا کمتر مورد توجه محققان قرار می‌گیرد. یکی از موارد مهمی است که در طراحی شناور باید مد نظر باشد. سکان از متعلقات زیرآبی در انواع شناورهای دریایی می‌باشد. کاهش نیروی پسا می‌تواند به کاهش مصرف سوخت و افزایش سرعت کاربری منجر گردد. در این پژوهش به مطالعه کاهش نیروی پسای وارد از سوی آب به سکان پرداخته شد. مطالعه موردی بر روی سکانی با مقطع NACA0025 بود. ریبلت‌ها در چند نسبت مختلف بر روی هیدروفویل سکان ایجاد و نیروی پسای اعمال شده با استفاده از شبیه‌سازی عددی در نرم‌افزار استارسی‌سی‌ام محاسبه گردید. نتایج حاکی از آن بود که در نسبت ارتفاع ریبلت صد میکرون و فاصله دویست میکرون، بیشترین میزان کاهش پسا به اندازه 5/12 درصد مشاهده گردید.

واژه های کلیدی: ریبلت، پسا، نیروی مقاومت، هیدروفویل، میکروریبلت

کلیدواژه‌ها

موضوعات


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