The possibility of achievement of the conditions for thermonuclear bur
n initiation in cluster-impact fusion (CIF) experiments is numerically
investigated by methods of hydrodynamics. High-energy cluster impacts
on the solid surface of frozen D-D and D-T mixtures are considered. T
wo-temperature 1-D and 2-D hydrodynamical mathematical models are used
to describe the dynamics of strongly coupled by shock waves plasma it
's pressures, temperatures as well as the processes of CIF initiation
having regard to the ion-electron energy relaxation, heat and radiatio
n transfer. Thermonuclear neutrons yields are calculated as well. It i
s shown that a relatively slow ion-electron energy exchange leads to a
n essential enhancement of CIF yields.