Theoretical and Experimental investigation of diverging hydraulic jump on adverse slope
Author(s):
Abstract:
To reduce the constructional costs of stilling basins, changes in geometries of cross section and plan of basin are sometimes used to adopt the basin with the upstream and downstream sections to eliminate transition structures. Any changes in the geometry of the basin would cause changes in the conditions and characteristics of the hydraulic jump. Hence, in this research, the effects of variation in both the adverse bed slope and the diverging angle of a gradually expanding stilling basin with rectangular section on the jump conditions were investigated both experimentally and theoretically. The experimental tests were conducted in a specially designed model for a wide range of bed slopes and longitudinal divergences of the basin walls. The important parameters of the jump, such as the length, sequent depth and the energy loss, were computed and compared to those in the classic jumps. Experiments was performed for 4 diverging angle (3, 5, 7 and 10°) and adverse bed slopes (2.27, 4.1, 5.61 and 8 percent) in addition to classic jump at wide range of Froude numbers (2.5-9). There is a good agreement between experimental and theoretical values of sequent depths of jump. The results show that for each diverging angle, increase in adverse bed slope from horizontal bed to 8 percent, caused approximately a decrease of the sequent depth and relative length of jump 47 and 35 percent respectively, and also an increase of the relative energy loss by 20 percents.
Keywords:
Language:
Persian
Published:
Iranian Water Research Journal, Volume:5 Issue: 9, 2012
Page:
121
magiran.com/p1022696
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!