طراحی اجکتوری جدید در صنعت بافت فرش به روش کاشت نخ

نوع مقاله : مقاله کوتاه

نویسندگان

• مسعود حاجیان ¹
• اسماعیل لکزیان ²
• علی فرهمند ³

¹ حکیم سبزواری

² دانشگاه حکیم سبزواری

³ شرکت سازه مکانو

10.22067/fum-mech.v29i1.51213

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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عنوان مقاله [English]

Design of an ejector in carpet industry by the method of Tufting

نویسندگان [English]

• Masoud Hajian ¹
• Esmail Lakzian ²
• Ali Farahmand ³

¹ Hakim Sabzevari

² Hakim Sabzevari

³ Mecano

چکیده [English]

In this paper a new ejector pump for using in textile and carpet knitting industries has been designed and optimized by numerical method. One of the customary methods in carpet knitting is tufting through which strings are deployed by fluid (air) and particular needles. In this study, a new method for sucking strings into the needles by employing air ejector has been proposed. Navier-Stokes equations for two-dimensional domain for a compressible turbulent steady flow have been solved. Furthermore, the Realizable k-ε method has been employed for the turbulent flow. The numerical method is verified by prior experimental data for similar ejector pump and good agreements are achieved. In this study, geometric parameters as length and divergence angle in mixing chamber, diffuser outlet diameter and initial inlet pressure are investigated. Numerical results suggest optimum values for divergence angle and length of the mixing chamber.

کلیدواژه‌ها [English]

• Tufting
• Ejector pump
• Inclination angle
• Length of mixing chamber
• Exit diameter of diffuser
• Entrainment ratio

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