摘要
Two quite different Saha equations modified to a two-temperature plasma were proposed and employed in many literatures.In order to clear up this confusion phenomenon lasted for a few decades in the community of thermal plasma science and technology,this paper re-examines the thermodynamic derivation of the two-temperature Saha equations.It is pointed out that the modified Saha equation deduced by using the minimum Gibbs or Helmholtz free energy is incorrect for the two-temperature plasma.Instead,a more rigorous derivation is presented here from the basic thermodynamic principle that the entropy in an isolated system always assumes its maximum value at chemical equilibrium.
作者
韩鹏
陈熙
李和平
HAN Peng;CHEN Xi;LI He-ping(Department of Engineering Mechanics,Tsinghua University,Beijing 100084)
基金
Supported by the National Natural Science Foundation of China under Grant Nos.59676011 and 59836220.