CFD-based nozzle performance evaluation method, computer and readable storage medium

Abstract

The invention provides a CFD-based nozzle performance evaluation method, a computer and a readable storage medium. The method comprises the following steps: establishing a to-be-evaluated three-dimensional model of a nozzle under a cutting working condition; importing the to-be-evaluated three-dimensional model into CFD software to generate a fluid domain model, and performing grid division; boundary layer division is conducted on the inner wall of the nozzle and the inner wall of the cutting slit; setting pressure flow data in the fluid domain model, and simulating and calculating the flow field distribution condition under the cutting working condition; preset comparison parameters are grabbed from the flow field and compared with relevant parameters of the reference three-dimensional model, and the performance of the nozzle to be evaluated is judged; the nozzle structure is changed. According to the evaluation method, the development efficiency is improved, the development cost is saved, optimization and design of the nozzle are facilitated, and the situation that the cutting effect cannot meet the requirement after use is avoided. In addition, the pressure of the boundary condition of the inlet can be set into various conditions according to the requirements of simulated working conditions, and the performance of the nozzle is improved under different cutting working conditions through comprehensive comparison.

Description

technical field [0001] The invention relates to the technical field of laser cutting nozzles, in particular to a method for evaluating nozzle performance based on CFD, a computer and a readable storage medium. Background technique [0002] Laser cutting uses a laser beam to melt the metal material, and the gas during the cutting process removes the molten metal and part of the heat from the kerf. Nozzle is an important part of laser cutting. The main function of the nozzle is the channel for the laser beam and gas discharge. The structural performance of the nozzle affects the quality of laser cutting, ensuring good processing quality and efficiency. [0003] In the current laser cutting industry, most of the major laser cutting machine manufacturers use cone nozzles and groove nozzles. The existing actual needs hope to change the nozzle structure, optimize the outlet gas flow field, and then optimize the cutting efficiency. . [0004] At present, when designing nozzles, ...

AI Technical Summary

Problems solved by technology

Using this method not only has low design efficiency, long development cycle, and high cost, but also sometimes fails to meet the requirements of the working conditions and cannot achieve the expected cutting effect.

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