文档介绍
| There is
an important significance to study the distribution of temperature and
velocity of the hollow cathode,which has been widely used in plasma waste
disposal, material surface modification,the welding and other
fields.Therefore,in order to study better for understanding the flow and heat
transfer in hollow cathode,we established a mathematical physics model to
study it.The magnetic vector potential A was used to calculated the magnetic
induction intensity B.We used the software FLUENT and developed a program
which is suitable for the thermal plasma simulation,and then the UDS(User
Defined Scalar) were used to add in the Maxwell’s equations.Meantime,using
the UDF(User Defined Function),the source terms in the MHD equations and the
materials of plasma were also added in.We calculated it in detail by the
SIMPLE methods, and on this basis,we obtained and analyzed the
characteristics of the nitrogen thermal plasma’s temperature and velocity
with different anode length.Several conclusions were obtained from the
simulation:the arc voltage of the plasma torch increased with the anode
length;with the increasing anode length,the temperature has a little change
but the velocity of the plasma increased,and also the power of the plasma
torch increased;the flame length increased with the anode length
increased.Those results offer us the theoretical guidance and reference for
our further experiments and the design of plasma torch. 一个空心阴极等离子体流域分析 |
文档标签:
流体力学
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