نوع مقاله : مقاله پژوهشی

نویسندگان

1 استاد، گروه عمران، دانشکده فنی و مهندسی، دانشگاه مراغه، مراغه، ایران

2 دانش‌آموخته دکتری، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه تبریز، تبریز، ایران

3 دانشجوی کارشناسی ارشد، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه مراغه، مراغه، ایران

10.22034/jewe.2021.295538.1596

چکیده

تعبیه آستانه در زیر دریچه‌کشویی از جمله راهکارهای کنترل دبی عبوری است. این پژوهش با هدف بررسی عددی ضریب‌دبی دریچه‌کشویی با ارتفاع و عرض‌های مختلف آستانه در شرایط جریان آزاد انجام شد. شبیه‌سازی‌ها با استفاده از نرم‌افزار FLOW-3D  صورت گرفت. نتایج نشان داد که با کاهش بازشدگی، ضریب­دبی افزایش می­یابد چرا که کاهش بازشدگی از 5  به cm  2، ضریب‌دبی در حالت با آستانه را 9% نسبت به حالت بدون آستانه افزایش داد. میزان افزایش  ضریب­دبی دریچه‌کشویی با آستانه به ارتفاع 1و cm 4 نسبت به حالت بدون آستانه به­ترتیب 5/1­ و 18% برآورد شد. بررسی تغییرات عرض آستانه نشان داد که کاهش عرض آستانه، با کاهش در مقدار سرعت و فشار جریان درکناره­های آستانه، ضریب‌دبی را کاهش می‌دهد. تأثیر سه پارامتر بازشدگی دریچه، ارتفاع و عرض آستانه مقایسه گردید. نتایج نشان داد که افزایش عرض آستانه نسبت به دو پارامتر ذکر شده، حداکثر افزایش ضریب‌دبی را به‌همراه دارد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Numerical Investigation on Effective Parameters on Hydraulic Flows in a Sluice Gate with Sill on Free-Flow Condition

نویسندگان [English]

  • Rasoul Daneshfaraz 1
  • Reza Norouzi 2
  • Parisa Ebadzadeh 3
  • Hamidreza Abbaszadeh 3

1 Professor, Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran

2 PhD Alumni, Department of Water Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran

3 M.Sc. Student, Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran

چکیده [English]

The presence of a sill under the sluice gate is one of the solutions to control the flow rate. This study was conducted to numerically investigate the discharge coefficient (Cd) of sluice gates with different heights and widths of sills in free flow conditions. The simulations were performed using FLOW-3D software. Results show that Cd increases as the gate opening decreases. Also, results showed that reducing the gate opening from 5 cm to 2 cm increases the Cd in the gate with sill by 9% compared to the non-sill gate. Discharge coefficients with 1 cm and 4 cm sills, compared to the non-sill condition were estimated at 1.5% and 18%, respectively. Examination of sill width changes showed that decreasing the width reduces the discharge coefficient by reducing the amount of velocity and flow pressure along the sill sides. The effects of three parameters of the gate opening, sill height, and sill width were compared. The results showed that increasing the sill width compared to the two mentioned parameters has the maximum increase in the Cd.

کلیدواژه‌ها [English]

  • Discharge Coefficient
  • Flow Pattern
  • Flow Pressure
  • Flow Velocity
  • FLOW-3D
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