SHOCK WAVE STRUCTURE IN IONIC PLASMA WITH CLUSTERS OF NEGATIVE CHARGES

摘要

The shock wave structure in weakly ionized ionic plasma with the presence of negative charged nanoparticles is studied on the base of a complex approach including the solution of the Boltzmann's equation and the Poisson's equation applied to the region of fast variation of the microscopic parameters (at the distance of several free path lengths) and the solution of the set of equation for the multi-temperature, multi-velocity gas dynamics of the chemically reacting weakly ionized plasma. It is found that in such a plasma where the major portion of electrons is bound (i.e. the conditions n_(e)n_(i)-≤n_(p-)≤n_(i+) ared valid) a 'super-bulldozer' effect can be observed. This effect is that the shock propagating through such a media captures the free electrons. In the region of several tens of free path length the fast compression of the electron up to ～4n_(i+(-∞)) gas has occurred resulting in electron number density elevation in four order of magnitude. Consequently its temperature increases in approximately 1000 times. Behind this region a zone of high concentration of electrons is formed. The electron temperature approach the equilibrium level at the distance of (m_(e)/m_(n))~(1/2)λ_(en) (where m_(e) - the electron mass, m_(n) - the neutral carrying gas mass, λ_(en) - the free path length of electrons). In this rather extended region the intensive physical-chemical processes (such an electron excitation of molecules) resulting in molecule dissociation and primary radicals formation take place. In particular, these processes can affect significantly on induction time of chain reaction.