Multi-condition design method for multi-phase mixed transportation axial flow pump impeller

Abstract

The invention relates to a multi-condition design method for a multi-phase mixed transportation axial flow pump impeller. The geometric parameters of an axial flow impeller are linked with the performance requirements of a plurality of conditions of an axial flow pump, and the axial flow pump capable of working normally under the conditions is designed through regulation of the geometric parameters of a blade. By adopting the design method, the working performance curve of the axial flow pump can be consistent with a practically-required performance curve; the design method is particularly suitable for a normal running situation under a plurality of conditions; meanwhile, the pump can keep high efficiency in a plurality of multi-phase-flow conditions by controlling the rotating speed, specific speed and the like of the pump.

Description

technical field [0001] The invention relates to a fluid machine, in particular to a design method for an impeller of a multiphase mixed-transport axial flow pump. Background technique [0002] Axial flow pumps are widely used in farmland drainage and irrigation, municipal squall water supply projects, water transfer projects, power plant circulating water projects and many other aspects in production and life. In recent years, they have also been applied in nuclear power and water jet propulsion. Pumps are of great significance to energy saving. Axial flow pumps have many operating conditions. For example, when discharging sewage in municipal drainage projects, axial flow pumps will operate under solid-liquid two-phase conditions. In nuclear power plant dehydration accidents, axial flow pumps will operate under vapor-liquid two-phase conditions. At present, the commonly used hydraulic design methods for axial flow pump impellers are all aimed at the design of axial flow pum...

AI Technical Summary

Problems solved by technology

However, when the liquid transported by the axial flow pump changes from a single liquid phase to multiphase, the head and efficiency of the axial flow pump designed by ordinary methods will drop rapidly, so that the axial flow pump cannot meet the design requirements, and it will also greatly reduce the efficiency of the axial flow pump. The increase in energy consumption is very unfavorable for a country with a large energy consumption

At the same time, when the axial flow pump is in multiphase flow conditions, it is sometimes required that the axial flow pump can meet certain flow and head requirements at multiple working condition points, and there are few design methods for impellers that meet several working condition points at the same time.

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