Modern methods of calculating high-pressure jet pumps do not take into account the presence of centrifugal forces during the rotation of the above ejection system in the well, which significantly affects the accuracy of determining its pressure and energy characteristics when predicting operating modes. The structure of the equations of pressure-flow characteristics of the high-pressure jet pump is supplemented by a component that determines the additional pressure caused by the influence of vortex flows during asymmetric rotation of the ejection system around the axis of the well. When modeling the working process of a jet pump, the ratios of hydrodynamics, traditionally used to study the peculiarities of the interaction of mixed flows, are supplemented by the equation of conservation of momentum of the fluid. Based on the joint solution of Bernoulli equations, preservation of the continuity of the moving medium, momentum, and momentum of the mixed flows, the relations for the analytical determination of the additional dynamic pressure created by the rotation of the eccentrically placed jet pump in the well are obtained. The analysis of the obtained equation taking into account the assumptions accepted at modeling, allowed to outline acceptable limits of change of coefficient of injection at the use of the offered technique of calculation which size should not exceed 0,85… 0,94 from the maximum value. In the process of studying the obtained equation, the extreme nature of the pressure-consumption and energy characteristics of the above ejection system was established. The value of the optimal pressure and maximum efficiency of the high-pressure jet pump and the value of its essential geometric parameter is inversely related. Rotation of the high-pressure jet pump in the well increases pressure and efficiency by 36.6% and 62.09%, respectively
Received 29.11.2021
Revised 29.03.2022
Accepted 23.05.2022
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