  The incompressible three-dimensional ideal flows develop very thin
pancake-like regions of increasing vorticity. These regions evolve with the
scaling $\omega_{\max}(t)\propto\ell(t)^{-2/3}$ between the vorticity maximum
and pancake thickness, and provide the leading contribution to the energy
spectrum, where the gradual formation of the Kolmogorov interval $E_{k}\propto
k^{-5/3}$ is observed for some initial flows [Agafontsev et. al, Phys. Fluids
27, 085102 (2015)]. With the massive numerical simulations, in the present
paper we study the influence of initial conditions on the processes of pancake
formation and the Kolmogorov energy spectrum development.
