  We report on numerical experiment of the recurrent onset of helical "blowout"
jets in an emerging flux region (EFR). We find that these jets are running with
velocities of $\sim 100-250\,\mathrm{kms^{-1}}$ and they transfer a vast amount
of heavy plasma into the outer solar atmosphere. During their emission, they
undergo an untwisting motion as a result of reconnection between the twisted
emerging and the non-twisted pre-existing magnetic field in the solar
atmosphere. For the first time in the context of blowout jets, we provide a
direct evidence that their untwisting motion is associated with the propagation
of torsional Alfv\'en waves in the corona.
