Research of Valve-Less Pumps With Changeable Cone Angle Nozzle/Diffuser Elements

Abstract

When it comes to the researches of valve-less pumps with nozzle/diffuser elements of different cone angles, they were usually achieved by manufacturing plural pumps, and the number of the pumps is determined by the accuracy of experiments required. However, the traditional way in which finite pumps of different cone angles were used to simulate the changeable cone angle and it would probably conceal some properties of the nozzle/diffuser elements. Meanwhile, many parameters of the nozzle/diffuser elements other than cone angle can not be kept in consistency. In the research, a new kind of 2-Dimensional nozzle/diffuser elements whose cone angles are changeable is created, and the cone angle of the new nozzle/diffuser elements can be adjusted through adjusting the position of the changeable flow passage. Furthermore, when liquid flow through nozzle/diffuser element, the nozzle/diffuser elements could make consecutive loss coefficient, which makes the changes of flux and flow direction. And the kind of pump with the new structure was developed in the research; the effectiveness and usefulness are also demonstrated and proved in the experiments.