Compared with fixed jet pumps (FJPs), adjustable jet pumps (FJPs) have a wider application potential in heating and other fields. However, the existing mathematical model of FJPs cannot accurately describe the performance of AJPs. In this paper, on the basis of considering the influence of the position of the needle on the performance of the adjustable jet pump, the existing mathematical model of FJPs is improved and simplified to characterize AJPs. Furthermore, the coefficients in the mathematical model are identified by genetic algorithm. After verification, the average error between the flow rate obtained by the mathematical model and the measured value is within 2%.
Keywords Adjustable jet pump,Mathematical model ,Velocity coefficients identification, Genetic algorithm