Effect of sand diameter on the performance of annular jet pumps

Abstract

For the current problem of low efficiency of the annular jet pump in transporting particles, the effects of different sand diameters on the flow field, pressure and efficiency inside the annular jet pump are analysed, in order to improve the structure of the annular jet pump to adapt to the transport of solid particles. The results show that when the flow rate is relatively small, due to the small flow rate of the suction mixture, it can not meet the suction capacity of the primary flow, which causes reflux in the suction chamber or throat; with the increase of the flow rate ratio, the transport capacity of the annular jet pump for the sand shows a parabolic growth, so to maintain the efficient transport capacity, the flow rate ratio should be selected between 0.4-0.7; the efficiency of sand transport of the annular jet pump is much higher than that of the centre jet pump, and it is much higher than that of the centre jet pump. Annular jet pump compared to the centre of the pump transport sand efficiency appeared the opposite phenomenon.