On the one hand , the sediment density current often does a great harm to the reservoir , and causes a big loss of reservoir ' s storage capacity or makes reservoir severe deposition ; on the other hand , sediment outflow by density current is an effective measure to mitigate sedimentation 异重流(本论文中主要指因含沙量的差异而形成的浑水异重流)一方面常常给水库带来严重的危害，加速水库的淤积和库容的损失；但另一方面它又为水库排沙提供了一种极为有效的途径? ?水库异重流排沙。
The turbulent characteristics of high - velocity sediment - laden and aerated flow are more other than the clear water flow of single - phase and current of low speed . in a special circulating system with high velocity flow , some flow parameters such as boundary shear stress and pulsation pressure are measured . an investigation is made on the turbulent characteristics of the three - phase flow of water , air and sand 本文针对高速含沙掺气水流的运动规律有别于低速水流及清水单相流，在自己研制的高速浑水循环系统中，通过对高速含沙掺气水流壁面剪切应力和脉动压强等参数的量测，分析了水沙气三相流的紊动特性，探索了泥沙对固壁的磨蚀机理及减蚀措施，其主要内容包括以下几个方面： 1
