旋流式射流泵装置性能试验研究

Experiment study on device performance of swirling jet pump

为提升旋流式射流泵装置性能,设计了1种新型旋流式射流泵装置.选用3种不同面积比的旋流式射流泵和与之相对应的无旋射流泵作为研究对象,通过改变流量比,研究旋流式射流泵装置性能随射流泵面积比和流量比的变化特点.结果表明:旋流式射流泵的最优面积比小于无旋射流泵;面积比偏大和偏小时,其压力比和装置效率明显优于无旋射流泵;旋流式射流泵的面积比与无旋射流泵的最优面积比接近时,其压力比和装置效率略优于无旋射流泵;旋流式射流泵装置的最佳效率点与无旋射流泵装置相比有向大流量比方向移动的趋势,这将增大装置性能的高效区范围.旋流式射流泵装置压力比最高能提高0.01,相当于无旋射流泵装置的5%~10%;旋流式射流泵装置效率最高能提高4%,相当于无旋射流泵装置效率的25%左右.

In order to enhance the performance of swirling jet pump device, a new swirling jet pump device was designed. Three different area ratio swirling jet pumps and corresponding non-rotating jet pumps were chosen as the study object, by changing the flow ratio, changing characteristics of the swirling jet pump device performance with jet pump area ratio and flow ratio was studied. The results show that the optimal area ratio of the swirling jet pump is less than that of the irrotational jet pump. Compared with the irrotational jet pump,when the swirling jet pump＇s area ratio is bigger or smaller, its pressure ratio and device efficiency are obviously superior to the irrotational jet pump＇s; while its area ratio is close to irrotational jet pump＇s, its pressure ratio and device efficiency are a little better than the irrotational jet pump＇s. Compared with the irrotational jet pump device, the best efficiency points of swirling jet pump device move to big flow ratio direction, which will increase the efficient dis- trict range of device performance. Swirling jet pump device＇s pressure ratio can increases 0.01 at most, equivalent to 5% -10% of irrotational jet pump device＇s ;while its efficiency can increases 4% at most, equivalent to about 25% of irrotational jet pump device＇s.