射流泵水力特性优化设计研究

Research of Optimization Design of Jet Pump's Hydraulic Characteristics

由于射流泵泵体内部高雷诺数的强剪切湍流射流,没有准确的理论公式可以表达其内部流体的流动、混合和扩散过程。在有关射流泵设计、优化方法的研究基础上,选取面积比、喉管长径比、喉嘴距作为关键参数,以提高效率为优化目标,对射流泵的水力特性开展数值计算,获得比初始设计效率提高6%的射流泵设计方案,进而降低对循环泵功率的需求。

The jet pump liquid in limited space with flow in irregular area belongs to high Reynolds number strong shear turbulent jet, therefore at present there is no complete and accurate formula that can express the flow of two kinds of different performance fluid mixing and diffusion in the jet pump. Based on the study of design and optimization method of jet pump by scholars at home and abroad, this paper selected the area ratio, throat length to diameter ratio and distance between throat and nozzle as the key parameters, with the goal to improve the efficiency and carry out the numerical calculations, and finally achieve a jet pump design, which efficiency increased by 6% than the initial design results. Consequently, the pump power is reduced.