TY - JOUR JF - JSTNAR JO - jwss VL - 18 IS - 67 PY - 2014 Y1 - 2014/6/01 TI - The Influence of Roughness in Adverse Bed Slopes on Conjugate Depth and Energy Losses of Hydraulic Jump TT - تأثیر زبری در شیب‌های معکوس بر عمق ثانویه و نرخ استهلاک انرژی پرش هیدرولیکی N2 - Most of researches related to hydraulic jump have been done on horizontal and rough beds, and little attempt has been made on rough beds with adverse slopes. The aim of this study was to investigate the influence of rough beds with adverse slope on hydraulic jump characteristics. The variations of energy loss in stilling basins with three adverse slopes and three different roughnesses were studied. Results showed that increase of roughness caused that relative depth of jump in stilling basins with rough bed and adverse slope decreased as compared to horizontal smooth beds. The experiments were performed on rough beds in different conditions where Froude number ranging between 4.9 and 7.8. Result showed that reduction of relative depth was about 31.15%. Results also showed that in such cases the relative energy losses are more than that for classic conditions. SP - 165 EP - 174 AU - N. Pourabdollah, AU - T. Honar, AU - R. Fatahi, AD - KW - Hydraulic jump KW - Slope beds KW - Roughness KW - Depth jump KW - Energy loss. UR - http://jstnar.iut.ac.ir/article-1-2084-en.html ER -