喷射式水下挖沟机冲刷试验

摘要

The effects of jet velocity and vertical angle are studied. The change process of a scour profile with time after impinging is analyzed and the similarity of the scour profile is investigated. Experimental results are meaningful to improve the design of the jet trenching machines. The results of the above work will also permit a better understanding of pipeline burial operations by jet trenching.%研究了喷口流速和喷管沿管道轴线方向倾斜对冲刷效果的影响,分析冲沟从刚开挖至平衡状态这一时间段内的历时变化过程和变化原因以及平衡状态时冲刷断面的自相似性.试验的成果对于喷射式水下挖沟机的优化设计和指导水下挖沟机施工作业具有参考意义.