Reverse design method for impeller of centrifugal pump

Abstract

The invention discloses a reverse design method for an impeller of a centrifugal pump, which comprises the following steps: according to a given impeller axial plane, a blade in a three-dimensional space can be actually expressed as X=X(z(u, v), r(u, v), theta(u, v)), the (z(u, v), r(u, v)) has been determined when a streamline of the impeller axial plane is given, and the space modeling of the blade can be determined by determining the theta(u, v) on the impeller axial plane. The reverse design method is characterized in that the reverse design method transforms a geometric design problem of the blade of the centrifugal pump into a boundary value problem of a partial differential equation to solve under the condition of the given impeller axial plane of the centrifugal pump. The reverse design method overcomes a lot of disadvantages such as the definition and modification of geometrical shape of the blade in the prior design method, can realize the parametric design of the blade, overcome the defects existing when a fussy two-dimensional form drawing is used for showing three-dimensional twisted blades in the prior method, can closely combine the hydraulic design of hydraulic machinery, three-dimensional solid modeling and the CFD analysis of flow field, and realize the quick and accurate solving of the reverse problem of the blade.

Description

technical field [0001] The invention relates to the technical field of design of centrifugal pump impellers, in particular to a reverse design method of centrifugal pump impellers. Background technique [0002] At present, the engineering design method of impeller of centrifugal pump still adopts the traditional one-dimensional theory, half classics and half theory method. The performance of the designed impeller has a great dependence on the designer's design experience. Although some researchers have proposed many new methods at present, these methods still have great deficiencies, such as inconvenient definition and modification of blade geometry, heavy workload, long design cycle, cumbersome design steps and difficult to realize centrifugal impeller design. The close combination of CFD / CAD and so on. Contents of the invention [0003] The object of the present invention is to provide a reverse design method of the centrifugal pump impeller in view of the defects in t...

AI Technical Summary

Problems solved by technology

Although some researchers have proposed many new methods at present, these methods still have great deficiencies, such as inconvenient definition and modification of blade geometry, heavy workload, long design cycle, cumbersome design steps and difficult to realize centrifugal impeller design. Close combination of CFD / CAD etc.

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