梯形转叶螺旋流消能装置水力特性研究

在有压输水管道内部装配合适的消能装置是解决供水工程剩余水头的一种重要消能方式。本文介绍了梯形转叶螺旋流消能装置的水力特性试验研究,根据试验数据计算分析了消能装置的消能效果,并对其在不同扭转角度下的消能效率进行了分析,从而确定此类消能装置最高消能效率可达水流压力的80%以上,能对下游建筑物设施起到良好的保护作用。综合试验结果表明,该装置结构基本合理,可作为管道消能装置设计的依据。

Study on hydraulic characteristics of trapezoid rotary vane-helical flow energy dissipation device

Arranging a suitable energy dissipation device inside of pressure water conveyance pipeline is an important method to solve the problem of residual head therein. The experimental study made on the hydraulic characteristics of a trapezoid rotary vane-helical flow energy dissipation device is introduced herein; in which the energy dissipation effect of the device is calculated and analyzed according to the relevant experiment data， and the energy dissipation efficiencies of it under various twist-angles are analyzed as well. Thus， it is determined that the maximum energy dissipation efficiency of this kind of energy dissipation devices can reach over 80% of the flow pressure thereof and then can place a better role to protect the downstream structures and facilities concerned. The comprehensive experiment result shows that the structure of the device is generally reasonable， and then can be taken as the basis for the design of such a pipeline energy dissipation device.