A nozzle (1; 100) with a nozzle inlet (1A; 100A) and a nozzle outlet (1B; 100B), comprising: - a shell (10; 110); - a rotor element (20; 120) located inside the shell (10; 110) and configured to be driven into rotation about a rotation axis upon being subjected to the action of a fluid flow entering the nozzle inlet (1A; 100A) and circulating through the nozzle (1; 100) towards the nozzle outlet (1B; 100B); and - a stationary splitter element (30; 130) located inside the shell (10; 110), downstream of the rotor element (20; 120), along the passage of the fluid flow, wherein the rotation axis of the rotor element (20; 120) coincides with a main direction along which the fluid flow projects from the nozzle outlet (1B; 100B), wherein the rotor element (20; 120) comprises a plurality of peripheral helical grooves (20a, 20b, 20c; 120a, 120b, 120c) configured to permit passage of the fluid flow and cause rotation of the rotor element (20; 120) about the rotation axis, wherein the splitter element (30; 130) comprises a plurality of splitter openings (30a, 30b; 130a, 130b) communicating with a downstream end of the plurality of peripheral helical grooves (20a, 20b, 20c; 120a, 120b, 120c) of the rotor element (20; 120) to cause splitting and modulation of the fluid flow as a function of rotation of the rotor element (20; 120) with respect to the stationary splitter element (30; 130), wherein the nozzle (1; 100) further comprises flow conditioning elements (35a, 35b; 135a, 135b) located inside the shell (10; 110), downstream of the splitter openings (30a, 30b; 130a, 130b), and configured to cause recombination of the fluid flow, split and modulated by the splitter element (30; 130), into a pulsatile jet of fluid projecting from the nozzle outlet (1B; 100B) along the main direction that coincides with the rotation axis of the rotor element (20; 120), and wherein the flow conditioning elements (35a, 35b; 135a, 135b) are further configured to impart a three-dimensional spiralling effect to the pulsatile jet of fluid projecting from the nozzle outlet (1B; 100B). - a shell (10; 110); - a rotor element (20; 120) located inside the shell (10; 110) and configured to be driven into rotation about a rotation axis upon being subjected to the action of a fluid flow entering the nozzle inlet (1A; 100A) and circulating through the nozzle (1; 100) towards the nozzle outlet (1B; 100B); and - a stationary splitter element (30; 130) located inside the shell (10; 110), downstream of the rotor element (20; 120), along the passage of the fluid flow, wherein the rotation axis of the rotor element (20; 120) coincides with a main direction along which the fluid flow projects from the nozzle outlet (1B; 100B), wherein the rotor element (20; 120) comprises a plurality of peripheral helical grooves (20a, 20b, 20c; 120a, 120b, 120c) configured to permit passage of the fluid flow and cause rotation of the rotor element (20; 120) about the rotation axis, wherein the splitter element (30; 130) comprises a plurality of splitter openings (30a, 30b; 130a, 130b) communicating with a downstream end of the plurality of peripheral helical grooves (20a, 20b, 20c; 120a, 120b, 120c) of the rotor element (20; 120) to cause splitting and modulation of the fluid flow as a function of rotation of the rotor element (20; 120) with respect to the stationary splitter element (30; 130), wherein the nozzle (1; 100) further comprises flow conditioning elements (35a, 35b; 135a, 135b) located inside the shell (10; 110), downstream of the splitter openings (30a, 30b; 130a, 130b), and configured to cause recombination of the fluid flow, split and modulated by the splitter element (30; 130), into a pulsatile jet of fluid projecting from the nozzle outlet (1B; 100B) along the main direction that coincides with the rotation axis of the rotor element (20; 120), and wherein the flow conditioning elements (35a, 35b; 135a, 135b) are further configured to impart a three-dimensional spiralling effect to the pulsatile jet of fluid projecting from the nozzle outlet (1B; 100B). wherein the rotation axis of the rotor element (20; 120) coincides with a main direction along which the fluid flow projects from the nozzle outlet (1B; 100B), wherein the rotor element (20; 120) comprises a plurality of peripheral helical grooves (20a, 20b, 20c; 120a, 120b, 120c) configured to permit passage of the fluid flow and cause rotation of the rotor element (20; 120) about the rotation axis, wherein the splitter element (30; 130) comprises a plurality of splitter openings (30a, 30b; 130a, 130b) communicating with a downstream end of the plurality of peripheral helical grooves (20a, 20b, 20c; 120a, 120b, 120c) of the rotor element (20; 120) to cause splitting and modulation of the fluid flow as a function of rotation of the rotor element (20; 120) with respect to the stationary splitter element (30; 130), wherein the nozzle (1; 100) further comprises flow conditioning elements (35a, 35b; 135a, 135b) located inside the shell (10; 110), downstream of the splitter openings (30a, 30b; 130a, 130b), and configured to cause recombination of the fluid flow, split and modulated by the splitter element (30; 130), into a pulsatile jet of fluid projecting from the nozzle outlet (1B; 100B) along the main direction that coincides with the rotation axis of the rotor element (20; 120), and wherein the flow conditioning elements (35a, 35b; 135a, 135b) are further configured to impart a three-dimensional spiralling effect to the pulsatile jet of fluid projecting from the nozzle outlet (1B; 100B).