طراحی اجکتوری جدید در صنعت بافت فرش به روش کاشت نخ

علوم کاربردی و محاسباتی در مکانیک

مقاله 6، دوره 29، شماره 1 - شماره پیاپی 17، اسفند 1396، صفحه 123-132   

نوع مقاله: مقاله کوتاه

شناسه دیجیتال (DOI): 10.22067/fum-mech.v29i1.51213

نویسندگان

مسعود حاجیان¹؛ اسماعیل لکزیان^{* 2}؛ علی فرهمند³

¹حکیم سبزواری

²دانشگاه حکیم سبزواری

³شرکت سازه مکانو

چکیده

در این مقاله اجکتوری جدید، جهت استفاده در صنعت نساجی و بافت فرش به روش عددی طراحی و بهینه سازی شده است. یکی از روش های معمول بافت فرش، فرآیند کاشت نخ (Tufting) است در این روش، نخ توسط هوا و با استفاده از سوزن هایی به سمت فرش منتقل می شوند. در این تحقیق برای اولین بار استفاده از اجکتور جهت مکش نخ به داخل سوزنها پیشنهاد شده است. معادلات ناویر استوکس به صورت دو بعدی، پایا، تراکم پذیر و با بکارگیری مدل توربولانسیRealizable k-ε حل شده اند. نتایج با داده های تجربی چاپ شده برای اجکتوری مشابه، مقایسه شده که انطباق مناسبی حاصل شده است. پارامتر های هندسی از جمله طول و زاویه همگرایی در محفظه اختلاط و قطر خروجی دیفیوزر و فشار ورودی اولیه در اجکتور پیشنهادی مورد بررسی قرار گرفتند. بر اساس نتایج عددی، مقادیر بهینه برای زاویه همگرایی محفظه اختلاط، طول محفظه اختلاط و قطر خارجی دیفیوزر تعیین گردید.

کلیدواژه‌ها

کاشت نخ؛ پمپ اجکتوری؛ زاویه همگرایی؛ طول محفظه اختلاط؛ قطر خروجی دیفیوزر؛ نسبت دبی

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