Self-Similar and Pseudosimilar Solutions of Strong Blast Waves in Electrogasdynamics

抄録

By adding the Poisson equation to the set of equations used in conventional blast wave analysis, the effects of the presence of charged particles in a gas are examined. This analysis is specially applicable to a strong blast wave of electron gas propagating through an electrically neutral plasma. Two similarity parameters result, one of which corresponds to the usual parameter, and the other contains the effect of the electric charge. Due to the low mass of the electrons as compared with that of the ions, a charge separation takes place at the shock front, resulting in a body force which tends to weaken the shock strength. Contrary to the classical gasdynamics, self-similar solutions of the electrogasdynamic blast wave with a constant energy can no longer be found. However, a pseudosimilar solution is possible which yields a constant energy.