收稿日期: 2014-12-29
修回日期: 2015-07-08
网络出版日期: 2016-01-15
基金资助
国家自然科学基金(51476162)和973ITER项目(2013GB114001)资助
Analysis of the instability of interaction between plasma and liquid metal
Received date: 2014-12-29
Revised date: 2015-07-08
Online published: 2016-01-15
未来聚变堆中,液态金属作为最有前景的面向等离子体部件之一,会同时受到超强磁场和高温等离子体的作用,离开原位置而进入堆芯等离子体中.本文列出3种具有代表性的不稳定现象并进行综合分析:1)由等离子体轰击液态金属引起的溅射现象,2)液态金属在磁场和电场共同作用下直接进入等离子体的飞溅现象和3)已经进入等离子体内部的金属液滴再次落下与液膜发生碰撞的现象.前人已经对溅射和液滴撞击液膜现象进行了深入研究.本文对前人的研究成果进行整合与分析,提出新的实验构想,探究磁场和电场作用下液态金属飞溅现象的形成机理.实验研究发现液态金属自由表面会逐渐长高,直至液态金属发生自由表面飞溅,飞溅的液滴能脱离液态金属"山峰"并落下,伴有二次液滴的形成.
贾潇 , 王增辉 . 等离子体与液态金属相互作用的不稳定现象分析[J]. 中国科学院大学学报, 2016 , 33(1) : 50 -56 . DOI: 10.7523/j.issn.2095-6134.2016.01.008
Liquid metal, serving as one of the most promising plasma facing components in future fusion reactors, will be controlled by both super annular magnetic field and plasma in high temperature, which will lead liquid metal leaving initial position to fusion core. Three specific instable phenomena are concerned in this paper: 1) sputtering of liquid metal by ion bombardment, 2) splashing of liquid metal under both magnetic and electric fields, and 3) dropping of liquid metal from fusion core onto liquid metal film. The previous researchers had a lot of profound studies on sputtering and droplet dropping onto liquid film,based on which we design new experiments to explore the generation of splash.Our experiments show that liquid metal free surface will gradually grow,and the droplets splash from liquid metal peaks, accompanied by secondary droplet formation.
Key words： liquid metal; sputtering; splashing; magnetic field; electric current
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