Research on Resonance Mechanism and Collaborative Optimization for the Self-excited Oscillating Pulse Cavitation Jet Nozzle

被引：0

作者：

Yuan, Xiaoming ^{[1
]}

Wang, Ning ^{[1
]}

Wang, Weidong ^{[1
]}

Zhang, Lijie ^{[1
]}

Zhu, Yong ^{[2
]}

机构：

[1] Hebei Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University, Qinhuangdao

[2] Key Laboratory of Fire Emergency Rescue Equipment, Ministry of Emergency Management, Shanghai

来源：

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2024年 / 60卷 / 16期

关键词：

collaborative optimization; nozzle; pulsed cavitation jet; resonance mechanism; self-excited oscillation;

D O I：

10.3901/JME.2024.16.377

中图分类号：

学科分类号：

摘要：

The peak value and pulsation amplitude of the self-excited oscillating pulse cavitation jet nozzle are important indexes to evaluate the jet performance. It is of great significance in theory and engineering practice to predict the peak value of the self-excited oscillating pulse cavitation jet nozzle accurately. In order to investigate the evolution mechanism of the inner and outer flow field of the self-excited oscillating pulse cavitation jet, a simulation model of the jet impact of the nozzle is established. Taking the inlet fillet, cavity diameter, cavity length and the diameter of the lower nozzle as the design variables, and taking the peak value of the striking force and the amplitude of the pulsation of the striking force as the target variables, the collaborative optimization design method of the nozzle of the self-excited oscillating pulse cavitation jet is determined by combining the orthogonal test method, the back propagation neural network and the non-dominated sorting genetic algorithm. The results show that when the inlet pressure is 1 MPa, the main and secondary order of the influences of various factors on the jet performance of the nozzle are the inlet fillet, the diameter of the lower nozzle, the cavity diameter and the cavity length. Compared with the optimal result of orthogonal test, the amplitude of impact pulsation increased by 62.68% and the peak value of impact increased by 1.13%. The optimal structure of the nozzle can produce obvious pulse cavitation jet, and the cavitation region of the nozzle cavity contracts periodically with time. The higher the inlet pressure, the higher the cavitation intensity and the higher the content of hollow bubbles. Based on the collaborative optimization results, a visualization test model of self-excited oscillating pulse cavitation jet nozzle flow field is fabricated by 3D printing technology, and the correctness of the simulation model is verified by experiments. The obtained conclusions provide support for the development of the design theory of self-oscillating pulsed cavitation jet nozzles. © 2024 Chinese Mechanical Engineering Society. All rights reserved.

引用

页码：377 / 389

页数：12

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