Evaluation of vortex evolution and energy loss within the impeller of a side channel pump

Side channel pumps can provide a huge pressure boost at very low specific speeds,making them useful in various industrial operations.Due to its very complex flow pattern,the high hydraulic head is often accompanied by lower efficiency and higher flow losses.In addition,the shape of the impeller has a direct influence on the flow pattern of the pump as well as the energy conversion that takes place,and this has a substantial bearing on the overall performance of the pump.Thus,to gain a deeper comprehension of the flow behavior and deep-seated reasons for performance optimization in side channel pumps with different geometry parameters.Extensive research has been conducted on the vortex formations and entropy production that occur inside the flow channels of the impeller.Three alternative impeller configurations were systematically created for in-depth research,each including a different suction angle for the blades.According to the data,the head of the side channel pump rises together with an increase in the suction angle,and this rule is exhibited in the whole working condition,and the most effective blade suction angle isθ=30°,which is the greatest of the available options.The vortex area and intensity have an obvious decrease when the suction angle increases to 30°,which is the main reason for the performance optimization.This paper firstly introduces the wall friction dissipation into the research on the side channel pump.Compared with turbulence dissipation and direct dissipation,the wall friction dissipation is far less than turbulence dissipation but far higher than direct dissipation that should not be neglected,although it also increases with the suction angle elevation.As the primary dissipation,the tendency of turbulence dissipation is upward with the performance increase,which is opposite to the common vane pump.The reason for this phenomenon is probably due to the deviation of the primary and secondary flow pattern in the side channel pump.As a result,this will assist to increase the performance and operational dependability of side channel pumps,which will ultimately lead to an expansion of the applications for these pumps.