An improved numerical model of ski-jump flood discharge atomization

作     者：LIAN Ji-jian ZHANG Shu-guang HE Jun-ling LIAN Ji-iian;ZHANG Shu-guang;HE Jun-ling

作者机构：State Key Laboratory of Hydraulic Engineering Simulation and SafetyTianjin UniversityTianjin 300350China School of Civil EngineeringTianjin UniversityTianjin 300350China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2022年第19卷第5期

页      面：1263-1273页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.U1765202,U20A20316,515779167) the Foundation for Innovative Research Groups of the Natural Science Foundation of Hebei Province of China(Grant No.E2020402074) 

主　　题：Flood discharge atomization Rainfall intensity distribution Numerical calculation Sensitivity analysis 

摘      要：Atomizing rainfall caused by flood discharge of high dams poses a great threat to the safety of powerhouse and ecological *** an indispensable means,numerical calculation is widely used in the safety design of discharge *** distribution of rainfall intensity is closely related to the trajectory nappe shape,jet trajectory distances,the splashed water droplet diameter and its velocity,and the spatial distribution of downstream nappe *** this paper,an experimental result is used to verify the improved stochastic splash mathematical model under different bucket types and discharge conditions,and the sensitivity of downstream rainfall intensity distribution to the shape of trajectory nappe,discharge flow,spatial distribution of downstream nappe wind,and the corresponding relationship between the droplet diameter and its splashing velocity is *** results show that the calculation accuracy of downstream rainfall intensity distribution is significantly improved when the above factors are taken into *** is found that the bucket type and flood discharge rate play the greatest role in the rainfall intensity distribution,followed by the downstream nappe wind distribution,and finally the corresponding relationship between the diameter and velocity of splash ***,these factors should be considered comprehensively when the rainfall intensity distribution of flood discharge atomization is *** study can help us to understand the influence factors of flood discharge atomization more deeply and predict the distribution of flood discharge atomization rainfall intensity more accurately.