Structure optimization method for Venturi fertilizer injector

Abstract

The invention relates to a structure optimization method for a Venturi fertilizer injector. The structure optimization method comprises the following steps of: 1) performing numerical simulation modeling and simulation on a model Venturi fertilizer injector by applying a computational fluid dynamics technology; 2) determining the range of structural parameters to be optimized of the Venturi fertilizer injector; 3) establishing a fertilizer absorption performance evaluation model of the Venturi fertilizer injector by taking fertilizer absorption efficiency as a comprehensive index; 4) performing orthogonal combination on the parameters to be optimized, performing numerical simulation by utilizing the computational fluid dynamics technology, and determining the optimal structural parameter combination of the Venturi fertilizer injector through a principal element analysis method: the minimal diameter Dt1 of a contraction section, the minimal diameter Dt2 of a diffusion section, the length L1 of the contraction section, the length L2 of the diffusion section, the length L0 of a throat part, the angle alpha of the contraction section and the angle beta of the diffusion section; and 5) processing and molding according to a group of the optimal structural parameters determined according to the step 4), and testing performance. The structure optimization method disclosed by the invention can be used for optimization design of the structural parameters of the Venturi fertilizer injector; and furthermore, the fertilizer absorption performance can be improved, and the fertilizer absorption efficiency can be predicted.

Description

technical field [0001] The invention relates to a structure optimization method of water-saving irrigation equipment, in particular to a structure optimization method of a Venturi fertilizer applicator. Background technique [0002] The irrigation water utilization coefficient of micro-irrigation can reach more than 90%. Therefore, micro-irrigation technology has been popularized and promoted in my country since the "Ninth Five-Year Plan". As of 2009, the national micro-irrigation area has reached 18 million mu. In line with the spirit of the Central Water Conservancy Work Conference, the national planning and development of water-saving irrigation projects covers an area of ​​about 195 million mu, including 48.16 million mu of micro-irrigation. A new round of upsurge in vigorously developing water-saving irrigation across the country has emerged. Modern micro-irrigation technology can realize the integrated operation of irrigation and fertilization, so it is necessary to inj...

AI Technical Summary

Problems solved by technology

Traditional design methods or established formulas have low calculation accuracy or poor applicability

Therefore, the determination of the structural parameters of the Venturi fertilizer applicator is relatively random when designing, and there is a lack of scientific and accurate calculation models to guide. The result must be: there may be many different design schemes for the Venturi fertilizer applicator with certain fertilizer absorption performance requirements, For different designers, especially the initial designers, it is very difficult to determine an optimal solution. It is often necessary to do a large number of model comparison tests to screen various design solutions, resulting in long product development cycles and high costs. Performance does not necessarily guarantee optimal

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