Numerical Calculation of Three - Dimensional Turbulent Flow in Axial Flow Pump

Numerical Calculation of Three - Dimensional Turbulent Flow in Axial Flow Pump
Axial flow pump, large flow, low head, widely used in irrigation, drainage, urban flood control and inter-basin water transfer and other projects, for its flow - head curve steep, efficient range of narrow range, the general large and medium-sized axial flow pump are Designed for the blade is fully adjustable and semi-conditioning type, for the regulation of conditions and expand the scope of use to provide a good condition.Modulated vane pump is in the shutdown state, remove some parts of the pump before they can install the blade angle And fully adjustable axial pump is the use of mechanical or hydraulic power in the pump start, stop and run the process at any time can adjust the angle of the blade installation is very conducive to the safe operation of pump equipment and economic operation. The blade will be affected by gravity, centrifugal force and water pressure.If the blade installation angle is adjustable, it will be affected by the friction torque.The effect of blade gravity on the rotation axis of petiole Torque is negligible, centrifugal torque can also be calculated and experimentally determined [1,2]. The role of water pressure on the surface of the leaf water torque generated by the location of the petiole axis to determine the blade placement angle to determine the power and operating oil The choice of pressure, petiole strength design is very important, but the impact of many factors, theoretical calculations have made some assumptions and approximation .3 Numerical calculation method for research and determine the leaf water torque provides a convenient, compared to the experiment Research methods, can shorten the research cycle and save the trial funding, and in the short term multi-program comparison.