《Table 1 The hydraulic characteristics of the experimental model》

《Table 1 The hydraulic characteristics of the experimental model》   提示:宽带有限、当前游客访问压缩模式
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《基因表达编程技术的180度弯曲浸没导向板附近腐蚀范围确定研究(英文)》


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The experimental study was performed at the hydraulic laboratory of Islamic Azad University,Ahvaz.All measurementswere recorded in clear water conditions without the formation of a ripple.The height of the sediment layer was 15 cm,and the layer covered the whole length of the channel.In addition,the time taken for the scour to attain equilibrium was 24 h.Also,the total number of experiments was 192.The submerged vanes were installed on a bend bed with a slope of0.001,and the 180°bend central radius and channel width were 2.8 and 0.6 m,respectively.The 180°bend relative curvature was 4.7(ratio of the bend central radius to the channel width).There was a rectangular channel at the 180°bend upstream with a length of 9 m and width of 0.6 m.Furthermore,a rectangular channel with a length of 6 m and width of 0.6 m was located at the bend downstream.The experimental flume height was 0.45 m,and the flume walls and bed were made of Plexiglas sheets.The water flowed toward the downstream flume from a tank which was installed at a height of 6 m through a pipe.To slow the flow,a detention pond was installed,and the flow entered it before reaching the flume.At the detention pond downstream and to measure the entering discharge,a 60-degree triangular weir was used.In addition,to adjust the flow in the flume,a slide gate is installed at the downstream channel outlet.The flow after the slide gate poured into a basin was free fall and then moved toward the tank by a pump.The submerged vanes were made of Plexiglas sheets with a thickness of 0.002 m,and the hydraulic and geometric characteristics of the experimental model were arranged in Table 1.