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بررسی آزمایشگاهی ضریب دبی جریان در سرریزهای مورب لبه پهن | ||
| مجله علوم کشاورزی ایران | ||
| مقاله 16، دوره 1، شماره 0 - شماره پیاپی 983، فروردین 1378 اصل مقاله (813.97 K) | ||
| نویسندگان | ||
| علی ولی خوجینی؛ سید محمد علی احمدی* | ||
| کلیدواژه‌ها | ||
| سرریز؛ سرریز لبه پهن؛ سرریز مورب؛ سرریز مورب لبه پهن؛ ضریب دبی؛ ضریب دبی جریان | ||
| عنوان مقاله [English] | ||
| - | ||
| چکیده [English] | ||
| Weirs are structures that have applications in water conveyance systems. Usually, weirs are constructed normal to the now direction. Otherwise, they are called oblique weirs. The 1enght of the oblique weirs are longer than the normal ones. The oblique weirs are essentially different from the normal weirs from hydraulics point of view because of having a longer lenght and different angle. One of the main hydraulic features is the relationship between total head and the discharge passing through the weir. In this equation the now passing over the weir (Q) is directly proportional to the total head (H) multiplied by discharge coefficient (Cd)' Therefore, Q ex: Cdx Hk x L. In the above relationship K is an exponent depending on the type of weir. A dimensional analysis shows that the coefficient Cd is a function of several factors. For a rectangular broad crested weir the relationship can be written as below: Cd = l' (a, HIB, HIP) Where a is the angle of declination, H is the total head, P is the height of weir and B is the width of weir in the tlow direction. In this study the total number of conducted experiments are 42.The results are presented in the form of the figures. | ||
| کلیدواژه‌ها [English] | ||
| Broad - Crested Oblique weir, Broad - Criested weir, Discharge coefficient, Flow Discharge Coefficient, Oblique weir & Weir | ||
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