中文摘要：

异重流排沙是多泥沙深水水库常采用的一种重要排沙方式，一般仅在调水调沙后期采用，且只能将运行至坝前的部分细粒径泥沙排出，具有一定的局限性。为此，提出了利用脉冲射流技术冲沙塑造人工异重流进行排沙清淤的思路，在淤积的水库中，从坝前开始，运用装置产生的脉冲射流将淤积泥沙冲起形成浑水，同时也形成相应的冲坑，这个过程不断自下游向上游进行并形成渠槽，结合异重流产生和运动的特点，产生的浑水在渠槽内向坝前运行，塑造成人工异重流，并探讨了利用脉冲射流塑造人工异重流进行排沙清淤的边界条件、泥沙条件和动力条件等技术参数。

英文摘要：

Density flow desilting is an important method adopted in sediment-laden and deep reservoirs to discharge sediment. And it is usually used in the later water and sediment regulation, and just part of fine particle sediment carried before a dam is ejected. Ac- tually, there exist limitations on it. So, sluicing sand and producing manpower density flow with the technology of pulse water jet is done in this paper, and sedimentation depositing is scoured by the pulse water jet produced with equipment. Meanwhile, formed muddy water and corresponding scouring pool from the front of the dam in the deposited reservoir. And the process is ceaselessly done from the downstream to the upstream and channels are formed. Combining the character of density flow causing and carrying, muddy water produced flowed upward the front of dam in the channels, and formed manpower density flow ultimately. Finally, boundary conditions of silt drainage, sediment condition and dynamic condition etc. are also discussed with pulse water jet producing manpower density flow in this paper.