排海污水挟沙射流研究进展

排海污水中往往含有一定数量的悬浮物，这些悬浮物在排放口附近中呈现出复杂的扩散与沉降特性，具有挟沙射流的典型运动特征。本文系统回顾了静水、恒定流、潮流和波浪等环境下排海污水挟沙射流的研究进展，发现在不同动力环境下挟沙射流泥沙沉积形态存在显著差异性。如何精细刻画波浪-水流-射流多动力耦合过程及其对泥沙输运和沉降过程的影响是排海污水挟沙射流研究的难点所在，对此提出了基于PIV/PLIF固相分离物理试验、粒子追踪两相流数值模型和拉格朗日积分模型，系统开展波流共同作用下挟沙射流运动规律研究的设想，以期为排海污水工程的优化设计提供重要参考。

Review of sediment-laden jet discharged from submarine outfall

Sewage discharged through an underground spout into the ocean often contains a certain quantity of suspended solids, which exhibit complex diffusion and sedimentation characteristics near sewage outlet, and with representative transport processes of a sediment-laden jet. This paper therefore systematically reviews the research progress of sewage sediment-laden jet in still water, crossflow, wave and wavy-crossflow environment, and finds that there are significant differences in sediment deposition patterns for sediment-laden jets in different dynamic environments. Methods on how to accurately describe the multiple dynamic coupling processes of wave-current jet interaction and its influence on sediment transport and sedimentation processes have been a difficult task in the study of sewage discharged sediment-laden jets. Therefore, a recommendation for systematically studying the motion law of sediment-laden jet under the joint action of wave and current based on PIV/PLIF solid-phase separation physical experiment, particle tracking two-phase flow numerical model, and Lagrange integral model is proposed. It is intended to provide an important reference for the optimal design of ocean sewage disposal projects.