Micro-irrigation pressure adjuster design method based on fluid-solid coupling numerical calculation

Abstract

The invention discloses a micro-irrigation pressure adjuster design method based on fluid-solid coupling numerical calculation. The method includes: adopting CAD (computer-aided design) software to establish a fluid area parametric geometric model and an adjusting component geometric model in a micro-irrigation pressure adjuster according to design requirements of the micro-irrigation pressure adjuster; respectively guiding fluid and the adjusting component CAD model into corresponding fluid and structure calculation module in ADINA of the CAD software, and setting boundary conditions and solving control parameters for fluid-solid coupling numerical calculation; timely performing grid reconfiguration during the numerical calculation to guarantee quality of grid calculated, adjusting geometric model parameters according to calculation results until the calculation results meet design accuracy requirements, and making quick forming testing parts for pressure adjusting performance tests; and comparing test results with design requirements, and modifying models or finishing design. The micro-irrigation pressure adjuster design method based on fluid-solid coupling numerical calculation overcomes defects of long development circle, high cost and the like in conventional design, so that design accuracy and efficiency of the micro-irrigation pressure adjuster are improved.

Description

technical field [0001] The invention relates to a design method of a micro-irrigation pressure regulator, in particular to a rapid design method of a micro-irrigation pressure regulator realized by using fluid-solid coupling numerical calculation technology. Background technique [0002] The pressure regulator is one of the main pressure regulating devices in the current micro-irrigation system. When the inlet pressure changes, its flow channel will automatically become larger or smaller to keep the outlet pressure stable. The pressure regulator has the characteristics of simple structure, wide adjustment range, and stable performance. It is usually installed at the inlet of branch pipes or capillary pipes in micro-irrigation projects, so that the pressure and head of each branch pipe or capillary inlet are equal, which reduces tedious calculations during design and simplifies the pipe network. The design improves the irrigation uniformity of the irrigation system, and also ...

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Problems solved by technology

Among them, there is a strong dynamic coupling relationship between the axial movement of the regulating component and the fluid motion, and it is difficult to obtain the dynamic flow characteristics of the fluid in the micro-irrigation pressure regulator by using the traditional CFD analysis method

[0003] The traditional micro-irrigation pressure regulator design mainly adopts the method of combining CFD calculation and experiment. It is not easy to accurately understand the relationship between the axial deformation of the adjustment component and the inlet and outlet pressure. The error of the model prediction result is relatively large, and the model parameters mainly depend on Physical parts experiment, through repeated experiments to finally finalize the product, the blindness of design and development is large, the development cycle is long, and the development cost is high

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