  We conduct a three-dimensional hydrodynamical simulation of a common envelope
evolution (CEE) where a neutron star (NS) spirals-in inside the envelope of a
red supergiant (RSG) star in a predetermined orbit. We find that the jets shed
pairs of vortices in an expanding spiral pattern, inflate two expanding
spirally-shaped low-density bubbles, one above and one below the equatorial
plane, and deposit angular momentum to the envelope. In the simulation we do
not include the gravity of the NS such that all effects we find are solely due
to the jets that the spiralling-in NS launches. The angular momentum that the
jets deposit to the envelope is of the same order of magnitude as the orbital
angular momentum and has the same direction. The turbulence that the jets
induce in the common envelope might play a role in transporting energy and
angular momentum. The jet-deposited energy that is radiated away (a process not
studied here) leads to a transient event that is termed common envelope jets
supernova (CEJSN) and might mimic an energetic core collapse supernova. The
turbulence and the spiral pattern that we explore here might lead to bumps in
the late light curve of the CEJSN when different segments of the ejected
envelope collide with each other. This study emphasizes the roles that jets can
play in CEE (including jets launched by black hole companions) and adds to the
rich variety of processes in CEJSN events.
