中文摘要：

采用在管道增加梯形开口节流片的方式，使高压水流形成螺旋流，达到消能减压的目的。研究了梯形开口节流片消能装置沿程水头变化、节流片在不同转角和雷诺数下的消能效率，结果表明：梯形开口节流片消能装置后压力明显降低，该部位为消能的主力区且有较好的消能效果；梯形开口节流片在相同开口情况下，消能装置的消能效率随节流片之间扭转角度的增大而增大，随主管道水流雷诺数的增大而增大；利用梯形开口节流片消能装置能有效消除管道中的多余能量，通过调节节流片之间的扭转角度来控制消能装置的消能效率是可行的。

英文摘要：

It used the method of increase the trapezoidal meter-piece in the pipeline to force high-pressure water to form a spiral flow and achieve the purpose of energy dissipation and decompression. This paper focused on the changes in the pressure differential of the trapezoidal opening the throttle slice energy dissipation device along the head,head loss and throttle slice energy dissipation efficiency under different openings and cor-ners. The results show that the trapezoidal opening day flow energy dissipation device before and after the pressure lifting is obviously,show that the site is the main area of energy dissipation and the energy dissipation effect is good;the trapezoidal opening day fabricated in the same opening con-ditions,energy dissipation device dissipation increased efficiency with throttle piece torsion angle increases,increases with the main pipeline flow Reynolds number increasing;using trapezoidal opening day flow energy dissipation device can effectively eliminate excess energy in the pipeline, through adjusting the torsion angle between the chip to control the energy dissipation device efficiency of energy dissipation is feasible.