垂直射流冲刷砂床的喷嘴间距试验研究
发布时间：2018-10-09 14:15
【摘要】：疏浚工程中常利用射流进行河道清淤和冲砂施工。为探究喷嘴间距对射流冲刷的影响,开展了一系列不同靶距、速度和间距的双喷嘴冲刷粗砂、中砂砂床试验,分析了冲刷坑形、冲坑深度和冲坑截面积的变化特性,得到了各工况下的最优喷嘴间距L_B和不利喷嘴间距L_N。结果表明,对于同一粒径砂床,改变靶距和速度冲刷时的L_B和L_N值变化较小,而与粗砂砂床相比,冲刷中砂砂床时的L_B和L_N值均有所增加。研究成果可供疏浚工程中射流系统设计作为参考。
[Abstract]:In dredging engineering, jet is often used to clear silt and wash sand. In order to investigate the influence of nozzle spacing on jet scour, a series of experiments on scouring coarse sand and sand bed with two nozzles with different target spacing, velocity and spacing were carried out, and the characteristics of scouring pit shape, depth and cross section of scour pit were analyzed. The optimal nozzle spacing LB and the unfavorable nozzle spacing L _ Ns are obtained. The results show that for the same sand bed with the same diameter, the LSP B and L _ S _ N values change slightly when the target distance and velocity are changed, but the LSP _ B and L _ S _ N values increase when the sand bed is scoured by the coarse sand bed. The research results can be used as a reference for the design of jet system in dredging engineering.
【作者单位】： 河海大学疏浚技术教育部工程研究中心;河海大学机电工程学院;
【基金】：中央高校基本科研业务经费项目(2013B10314)
【分类号】：TV851
，
本文编号：2259646
[Abstract]:In dredging engineering, jet is often used to clear silt and wash sand. In order to investigate the influence of nozzle spacing on jet scour, a series of experiments on scouring coarse sand and sand bed with two nozzles with different target spacing, velocity and spacing were carried out, and the characteristics of scouring pit shape, depth and cross section of scour pit were analyzed. The optimal nozzle spacing LB and the unfavorable nozzle spacing L _ Ns are obtained. The results show that for the same sand bed with the same diameter, the LSP B and L _ S _ N values change slightly when the target distance and velocity are changed, but the LSP _ B and L _ S _ N values increase when the sand bed is scoured by the coarse sand bed. The research results can be used as a reference for the design of jet system in dredging engineering.
【作者单位】： 河海大学疏浚技术教育部工程研究中心;河海大学机电工程学院;
【基金】：中央高校基本科研业务经费项目(2013B10314)
【分类号】：TV851
，
本文编号：2259646
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