مروری بر کاربرد ابزار ترکیبی شبکة راکتور شیمیایی و دینامیک سیالات محاسباتی به‌منظور پیش‌بینی انتشار آلاینده‌ها

نوع مقاله: علمی- ترویجی

نویسندگان

1 دانشیار گروه هوافضا- دانشگاه تربیت مدرس

2 پژوهشگاه هوافضا، تهران، ایران

3 دانشگاه تربیت مدرس، دانشکده مکانیک، گروه هوافضا، تهران، ایران

چکیده

امروزه، کاهش انتشار آلاینده‌های حاصل از فرایندهای احتراقی امری جدایی‌ناپذیر در روند طراحی محفظه‌های احتراق می‌باشد. رویکرد شبکة راکتور شیمیایی به دلیل کاهش هزینه‌ها، سرعت زیاد و همچنین دقت مناسب در نتایج روشی مناسب برای تخمین میزان انتشار آلاینده‌هایی نظیر NOx در سیستم‌های احتراقی می‌باشد. این روش نیازمند داده‌های اولیه از میدان جریان به‌منظور ساخت شبکة راکتورها است. در این مقاله کاربرد دینامیک سیالات محاسباتی به‌عنوان یکی از پراستفاده‌ترین روش‌ها در تخمین میدان جریان و ارائه داده‌های اولیه برای ساخت شبکة راکتورها مورد بررسی قرار گرفته است. در مطالعة حاضر رویکردهای مختلف مدل‌سازی آشفتگی جریان، مکانیسم‌های به ­کار رفته و مدل‌های احتراقی در دینامیک سیالات محاسباتی به‌منظور استفاده از نتایج در ساخت شبکة راکتورها مورد مطالعه قرار گرفته است. می‌توان بیان کرد که شبکة راکتورها حتی با تعداد کمینة راکتورها می‌توانند نتایج مناسبی از غلظت محصولات احتراق ارائه کنند. پس، باید در نظر داشت که افزایش دقت در حل دینامیک سیالات محاسباتی نباید به حدی باشد که هزینه‌های محاسباتی را بی­ هدف بیفزاید.

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