شبیه‌سازی عملکرد یک موتور اشتعال تراکمی با واکنش پذیری کنترل شده (RCCI) با سوخت بیودیزل روغن پسماند پخت و پز (WCO) با تمرکز بر روند مصرف گونه‌های تشکیل دهنده‌ی سوخت

نوع مقاله : مقاله مستقل

نویسندگان

1 دانشجوی دکتری، دانشکده مکانیک، دانشگاه صنعتی نوشیروانی بابل

2 استاد، دانشکده مکانیک، دانشگاه صنعتی نوشیروانی بابل

3 دانشیار، دانشکده مکانیک، دانشگاه صنعتی نوشیروانی بابل

4 پژوهشگر فوق دکتری، آزمایشگاه کوریا. / INSA Rouen Normandie

10.22044/jsfm.2024.13558.3786

چکیده

به‌کارگیری استراتژی موتورهای کم‌دماسوز یکی از راهکارهای موثر برای کاهش اکسیدهای نیتروژن می‌باشد؛ در مطالعه‌ی حاضر یک کد تک‌ناحیه‌ای با درنظر گرفتن مکانیزم سینتیک مفصل شیمیایی، جهت بررسی عملکرد یک موتور RCCI با سوخت ترکیبی دیزل/بیودیزل WCO - بنزین توسعه داده شد. ابتدا نتایج عددی به‌کمک نتایج تجربی اعتبارسنجی و سپس پارامترهای عملکردی و نرخ تولید و مصرف گونه‌ها در بارهای مختلف بررسی شد. بررسی مصرف گونه‌های شیمیایی نشان داد، اسیدهای چرب غیر اشباع در فرآیند احتراق با سرعت بیشتری مصرف می‌شوند. سرعت مصرف دیزل نیز نسبت به WCO در تمامی بارها کمتر است. با توجه به نتایج، با افزایش بار از 20 تا 80 درصد، لحظه‌ی شروع احتراق گرم، در حدود 5/2 درجه به لحظه‌ی شروع پاشش سوخت نزدیک‌تر می‌شود. همچنین با افزایش جرم سوخت، به دلیل سهم بالای سوخت LR بازه‌ی شکل‌گیری احتراق سرد کوتاه‌تر می‌شود. در تمامی حالت‌ها شروع تولید گونه‌ی فرمالدهید هم‌زمان با آغاز آزادسازی حرارت دماپایین و شروع تولید گونه‌ی هیدروکسیل هم‌زمان با آغاز فرآیند آزادسازی حرارت دما بالا است. نسبت مولی فرمالدهید تولید شده به هیدروکسیل با افزایش بار موتور، به دلیل کاهش نسبت سوخت DI به FPI کاهش یافته، منجربه کاهش بازه‌ی احتراق سرد می‌شود.

کلیدواژه‌ها

موضوعات


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