Development of the bouble difusion augmentator of interface instability type by using an unsteady Lorentz force

利用非定常洛伦兹力研制界面不稳定型球泡扩散增强器

基本信息

批准号：
05555057
负责人：
YAMANE Ryuichiro
金额：
$ 5.12万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

项目摘要

Analyzes and experiments were conducted for the development of the bouble difusion augmentator of interface instability type by using an unsteady Lorentz force, and following conclusions were derived :(1) In the case that the unsteady Lorentz force is generated by uniform horizontal AC magnetic field :i) Unstable waves generated on the liquid metal surface oscillate in the same frequency as the AC magnetic field.ii) Unstable conditions are dependent on 4 parameters ; the magnetic Reynolds number Rm, the Stuart number Np, the weber number we , and the Reynolds number Re.iii) The waves which wave vector are parallel with the magnetic field are most unstable.iv) In the case that both the Weber number We and the Reynolds number Re are fixed at some values, unstable boundary moves upward in tha omega-Np plane with a decrease of the magnetic Reynolds number, and the system becomes stable ; however, the relation between the frequency of the AC magnetic field and the wave number of the unstabl … More e wave hardly changes.v) In the case that both the magnetic Reynolds number Rm and the Reynolds number are fixed at some values, unstable boundary moves to the right-hand side in the omega-Np plane and the wave number of the unstable wave decreases with a decrease of the Weber number.vi) In the case that both the magnetic Reynolds number Rm and the Weber number are fixed at some values, unstable boundary moves upward in the omega-Np plane ; however, the relation between the frequency of the AC magnetic field and the wave number of the unstable wave hardly changes.vii) The frequency of the AC magnetic field becomes higher, the induced electric current concentrate around the free surface and the temperature rises severely.viii) Relatively strong magnetic field with a high frequency are needed for the genaration of unstable waves in the actual machine.(2) In the case that the unsteady Lorentz force is generated by simulteneous imposition of horizontal DC and AC magnetic fields :i) The waves with the same frequency as the AC magnetic field appear on the liquid metal surface.ii) The optimum strength of the DC magnetic field that gives the waves of the largest amplitude exists and changes in value according to the strength of AC magnetic field.iii) The oscilation mode depends not on the distribution of the magnetic field but on the shape of the container. Less

进行了分析和实验，以通过使用不稳定的洛伦兹力来开发界面不稳定性类型的花束分裂扩增器，并得出以下结论：（1）如果不稳定的洛伦兹力是由不稳定的洛伦兹力是由均匀的水平AC磁场产生的：i）在均匀的水平磁场上产生的液体表面上的磁性均可在液体表面上产生液体易于的液体，并在液体表面上均具有液体液体的效率。取决于4个参数； the magnetic Reynolds number Rm, the Stuart number Np, the weber number we , and the Reynolds number Re.iii) The waves which wave vector are parallel with the magnetic field are most unstable.iv) In the case that both the Weber number We and the Reynolds number Re are fixed at some values, unstable boundary moves upward in tha omega-Np plane with a decrease of the magnetic Reynolds number, and系统变得稳定；但是，在AC磁场的频率与不稳定的波浪数之间的关系几乎不会变化。V）在这种情况下，磁性雷诺数rm rm和雷诺数都固定在某些值时，不稳定的边界移动到omega-np平面中的右侧，并且随着不稳定的波浪数量而降低了数字的降低。 RM和Weber编号是在某些值时固定的，不稳定的边界在Omega-NP平面上向上移动；然而，AC磁场的频率与不稳定波的波数之间的关系几乎不会变化。VII）AC磁场的频率变得更高，自由表面周围的电流浓度和温度的诱导电流浓度和温度严重上升。viii）相对强的磁场相对较高的磁场需要高频率才能通过不稳定的势力在实际机器中产生不稳定的磁力。水平直流和交流磁场的水平：i）与AC磁场出现在液体金属表面上的波浪的波浪。II）DC磁场的最佳强度，使最大放大器的波浪具有最大的波浪，并根据AC磁场的强度变化。IIII）的振动模式不取决于磁场的分布，而不是磁场的分布。较少的