流向磁场下液态金属射流破碎特性的实验研究

doi:10.7523/j.ucas.2023.067

中国科学院大学学报 ›› 2025, Vol. 42 ›› Issue (4): 433-440.DOI: 10.7523/j.ucas.2023.067

• 数学与物理学 •

流向磁场下液态金属射流破碎特性的实验研究

李扬¹, 陈龙¹, 阳倦成², 吕泽¹

1. 中国科学院大学工程科学学院, 北京 100049;
2. 西安交通大学航天航空学院机械结构强度与振动国家重点实验室, 西安 710049

收稿日期:2023-05-15 修回日期:2023-05-31 发布日期:2023-05-31
通讯作者: 陈龙,E-mail:chenlong@ucas.ac.cn
基金资助:
国家自然科学基金(52076204,1927812,51776166)资助

Experimental study of the breakup characteristics of liquid metal free jet exposed to a longitudinal magnetic field

LI Yang¹, CHEN Long¹, YANG Juancheng², LYU Ze¹

1. School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China;
2. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Received:2023-05-15 Revised:2023-05-31 Published:2023-05-31

摘要/Abstract

摘要： 为深入理解液态金属射流的磁流体力学特性，基于自行搭建的液态金属射流实验平台，对流向磁场条件下液态金属镓铟锡射流破碎过程开展实验研究。从射流形态、破碎长度、表面扰动和液滴分布4个方面分析射流破碎特性。无磁场时破碎长度随We增大而增大，射流表面波长在表面张力的作用下趋近于临界波长，射流破碎液滴体积直径呈现双峰结构。施加流向磁场后，射流破碎形成的液滴发生振动衰减，在破碎位置下游呈现等大球形液滴，表面波长随磁场的增强而变短，射流破碎长度随磁场的增强而变长。最后归纳了流向磁场对射流破碎长度的3种影响方式。

关键词: 液态金属, 自由射流, 破碎特性, 流向磁场

Abstract: To gain a deeper understanding of the magnetohydrodynamic characteristics of liquid metal jets, this study conducted experimental research on the breakup process of a liquid metal GaInSn jet under a flow-aligned magnetic field condition. Based on a self-built liquid metal jet experimental platform, the jet breakup characteristics were experimentally analyzed from four aspects: jet morphology, breakup length, surface disturbance, and droplet distribution. In the absence of a magnetic field, the breakup length increased with the increasing We number. The surface wavelength of the jet approached the critical wavelength under the action of surface tension, and the volume diameter of the jet breakup droplets showed a bimodal structure. When a flow-aligned magnetic field was applied, the droplets formed after jet breakup were subject to vibration attenuation under the action of the flow-aligned magnetic field and exhibited equally sized spherical droplets downstream of the breakup position. The surface wavelength decreased with increasing magnetic field, while the breakup length increased. Three types of influences of the flow-aligned magnetic field on the breakup length of the jet were summarized.

Key words: liquid metal, free jet, breakup characteristics, longitudinal magnetic

中图分类号:

O361.3

李扬, 陈龙, 阳倦成, 吕泽. 流向磁场下液态金属射流破碎特性的实验研究[J]. 中国科学院大学学报, 2025, 42(4): 433-440.

LI Yang, CHEN Long, YANG Juancheng, LYU Ze. Experimental study of the breakup characteristics of liquid metal free jet exposed to a longitudinal magnetic field[J]. Journal of University of Chinese Academy of Sciences, 2025, 42(4): 433-440.

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流向磁场下液态金属射流破碎特性的实验研究

Experimental study of the breakup characteristics of liquid metal free jet exposed to a longitudinal magnetic field

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