نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری، گروه آب و سازه‌های هیدرولیکی، دانشکده مهندسی عمران، دانشگاه زنجان، زنجان، ایران
2 دانشیار، گروه آب و سازه‌های هیدرولیکی، دانشکده مهندسی عمران، دانشگاه زنجان، زنجان، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this paper, the results of scour depth (Ds) and scour pit length (Ld) are compared with the experimental results conducted by Elnikhely and Fathy at 4 different discharges, 0.007, 0.008, 0.009 and 0.010 m3/s. The dimensionless parameters are the ratio of scour depth to the depth of the outfall (Yt), i.e. Ds/Yt, and the ratio of scour pit length to the depth of the outfall, i.e. Ld/Yt. It is observed that with increasing discharge, the maximum values of the dimensionless ratios Ds/Yt and Ld/Yt have a decreasing trend. This is because with increasing discharge, the depth of the outfall increases. This research showed that the numerical model has a good ability to simulate the sediment transport and scour process downstream of the triangular convoluted spillway. The numerical results are in good agreement with the experimental results and the rate of change of the scour pit at the bottom of the spillway is close to zero. With increasing discharge, the maximum values of the depth and length of the scour pit have decreased. On average, the difference between the numerical and experimental results is less than 5%. It can be concluded that there is a good agreement between the results. Numerical simulation of physical phenomena allows for a more detailed study of the flow field, velocity vectors and pressure contours, which is also discussed in this article.
کلیدواژه‌ها [English]
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