Optimized design method for impeller blade of axial flow fan

Abstract

The invention relates to an optimized design method for an impeller blade of an axial flow fan. According to the optimized design method, an optimality principle and a numerical calculation method are used; and under the condition that design parameters of the axial flow fan and various engineering constraint conditions are met, the flow pattern of the impeller blade of the axial flow fan is reasonably selected, and structural parameters of the impeller blade of the axial flow are reasonably calculated, so that the efficiency of the axial flow fan is improved, and the size and the weight of the axial flow fan are reduced. Excel can also be used to complete the whole optimized design process of the axial flow fan, the flow pattern and the various structural parameters, such as the diameter of the impeller blade, the hub ratio and the amount of the impeller blade, of the impeller blade can be adjusted according to the design parameters of the axial flow fan, and a plurality of design schemes can be rapidly compared so as to select an optimal scheme from the design schemes. According to the optimized design method for the impeller blade of the axial flow fan, problems of low calculation accuracy, time-consuming and labor-consuming calculation, long design periods and the like existing in current aerodynamic designs of the axial flow fan are solved, the efficiency of the axial flow fan is improved, the method is simple and direct, design time is greatly shortened, design accuracy is greatly improved, costs are low, and usage of mass fan enterprises is facilitated.

Description

technical field [0001] The invention relates to a design method of an axial flow fan, in particular to a design method of an axial flow fan using optimization theory and technology, which belongs to the intersecting field of fluid machinery technology and computer software development technology. Background technique [0002] The traditional aerodynamic design method of axial flow fan impeller adopts the design method based on the airfoil test data in the isolated state or the plane cascade state. In the design, the flow pattern of the fan impeller and the impeller structural parameters are often selected The comparison of several design schemes takes a long time to design, and the design effect often depends on the experience of the designer. At present, most of the axial flow fan impellers used in China are made of blades designed according to the traditional aerodynamic design method. For the purpose of required air volume and wind pressure, the efficiency of the fan is ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the time-consuming and labor-intensive traditional design methods of axial flow fans, the long development cycle, and the complexity and immaturity of secondary development of quasi-ternary flow theory and CFD technology applied to the design of medium and low pressure axial flow fans and other shortcomings, providing an optimized aerodynamic design method for axial flow fan impeller blades based on optimization principles and technologies

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