Numerical Analysis of the Influence of the Impinging Distance on the Scouring Efficiency of Submerged Jets  

作　　者：Hao Chen Xianbin Teng Zhibin Zhang Faxin Zhu Jie Wang Zhaohao Zhang 

机构地区：[1]School of Naval Architecture and Maritime,Zhejiang Ocean University,Zhoushan,316022,China [2]School of Marine Engineering,Guangzhou Maritime University,Guangzhou,510725,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第2期429-445,共17页流体力学与材料加工（英文）

基　　金：supported by the Research on the Prediction Mechanism of Corrosion for High Strength Steel in Deep Sea Service Driven by Multi-Scale,High-Dimension and Small-Sample Data(C2301002635);Research on the Influence of Nozzle Structure on the Scouring Effect of Submerged Water Jet(2023R411045);the Zhejiang Ocean University Outstanding Master’s Thesis Cultivation Project(ZJOUYJS20230018);the Scientific Research Project of Zhejiang Graduate Education Society in 2022(2022-021)which was gained by Chen.

摘　　要：Water jet technology is widely used in submerged buried pipes as a non-traditional trenching process,often invol-ving a complex sediment response.An important adjustable and influential engineering variable in this technol-ogy is represented by the impinging distance.In this study,the FLOW-3D software was used to simulate the jet scouring of sand beds in a submerged environment.In particular,four sets of experimental conditions were con-sidered to discern the relationship between the maximum scour depth and mass and the impinging distance.As shown by the results,a critical impinging distance h0 exists by which the static scour depth can be maximized;the scour mass ratio between dynamic and static conditions decreases as the impinging distance increases.Moreover,the profile contours are similar when the erosion parameter Ec is in the range 0.35<Ec<2.Empirical equations applicable for predicting the jet trenching contour under both dynamic and static scour modes are also provided in this study.

关 键 词：Submerged jet impinging distance numerical simulation scour depth scour profile 

分 类 号：O35[理学—流体力学]