科技创新与应用2025，Vol.15Issue(31)：46-52,7.DOI:10.19981/j.CN23-1581/G3.2025.31.011
圆管淹没射流条件下冲坑三维形态演变特征
李凌云 1卫望汝1
作者信息
- 1. 四川大学 山区河流保护与治理全国重点实验室,成都 610065
- 折叠
摘要
Abstract
Through physical model tests and using submerged inclined circular pipe jet conditions,the 3D morphology of scour pits and the changes with their scales during the scouring process of uniform dispersed sand beds were measured and compared.The effects of different water flow velocities and water cushion depths on the depth,length and width of the impingement pits were studied.In the early stage of formation of the scour pit,the scale of the scour pit changes more violently.The flow velocity of water has a more significant impact on the scour pit stability test relative to the depth of the water cushion.For the final scale of the scour pit in the three directions,the relative development speed of the scour pit depth and length is higher than that of the scour pit depth.Based on the time-domain variation law of the scour pitscale,the autocorrelation of depth,length and width during the formation of the scour pit is obtained.With the increase of the jet flow velocity and the decrease of the water cushion depth,the scour pit gradually develops from a wide and shallow shape to a narrow and deep scour pit.The 3D morphology of scour pits has a gradually significant impact on the depth of the scour pit,and features that inhibit the development of the scour pit depth appear.This test results provide an exploratory study on the impact of 3D morphology of scour pits on jet scouring and scour pit formation,and thereby provide a reference for more scientific analysis and evaluation of water conservancy projects for energy dissipation.关键词
淹没射流/挑流冲刷/冲坑三维形态/圆管射流/试验研究Key words
submerged jet/jet scouring/3D morphology of scour pit/tube jet/experimental study分类
水利科学引用本文复制引用
李凌云,卫望汝..圆管淹没射流条件下冲坑三维形态演变特征[J].科技创新与应用,2025,15(31):46-52,7.
