توزیع سرعت متوسط عمقی در کانال‌های صاف ذوزنقه‌ای و مستطیلی با بهترین مقطع هیدرولیکی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانش¬آموخته کارشناسی ارشد مهندسی عمران، دانشگاه صنعتی اصفهان

2 دانشیار، دانشکده مهندسی عمران، دانشگاه صنعتی اصفهان

چکیده

رابطه‌های عمومی تخمین توزیع سرعت متوسط عمقی در کانال‌های باز با مقطع ذوزنقه‌ای، نتایج مناسبی ارائه نمی‌کنند. از این‌رو در این مقاله به ارائه روشی جدید برای تخمین این پارامتر در کانال‌های صاف ذوزنقه‌ای با بهترین مقطع هیدرولیکی پرداخته ‌شد. در این روش، توزیع سرعت متوسط عمقی با استفاده از رابطة تنش برشی جداره محاسبه ‌شد. برای واسنجی مدل تحلیلی، از نتایج مدل‌سازی آزمایشگاهی استفاده شد. نتایج حاصل از مقایسه مدل تحلیلی و آزمایشگاهی نشان می‌دهد که روش ارائه شده از دقت قابل قبولی برخوردار است.

کلیدواژه‌ها


عنوان مقاله [English]

Depth-averaged Velocity Distribution in Smooth Trapezoidal and Rectangular Open Channels with the Best Hydraulic Section

نویسندگان [English]

  • Faemeh Farshi 1
  • Abdoreza Kabiri Samani 2
چکیده [English]

General equations for predicting depth-averaged velocity in open channels are not well suited for trapezoidal open channels. In this study, an innovative method is developed for predicting the depth-averaged velocity distributions in smooth trapezoidal open channels with the best hydraulic section. Depth-averaged velocity was obtained using the boundary shear stress obtained in the present study. To calibrate the present analytical results, an experimental investigation was also performed. Analytical results compared well with the experimental data.

کلیدواژه‌ها [English]

  • open channel
  • Depth-averaged velocity
  • Boundary Shear Stress
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