SELF-EXCITATION OSCILLATION JET IMPACT NOZZLE FOR COMPLEX FLUID ATOMIZATION

摘要

A self-excitation oscillation jet impact nozzle for complex fluid atomization comprises a liquid collecting cavity housing (1), a jet faceplate (2) and a resonant cavity housing (4). A screw hole, which is connected to a supplying pipeline, is provided in the upper center of the liquid collecting cavity housing. The liquid collecting cavity housing is coupled with the jet faceplate by a flange and is sealed with a sealing gasket. A hollow cavity between the liquid collecting cavity housing and the jet faceplate is a liquid collecting cavity (12). A frustum cone-like concave space (23) is provided in the bottom center of the jet faceplate. Two or more jet holes are symmetrically arranged perpendicularly to lateral surfaces of the frustum cone-like concave space. The axes of the jet holes make a certain angle with the center axis of the jet faceplate and all of the axes of the jet holes intersect in an intersection which belongs to the center axis of the jet faceplate. Jet-hole inlets (21) which comprise inner screws are provided in frustum cone side surfaces at the upper center of the jet faceplate. A resonant cavity inlet (42) is provided on the resonant cavity housing which comprises outer screws and is coupled with the jet faceplate by the inner screws of the jet-hole inlets, and two or more resonant cavities (41) is formed between the resonant cavity housing and the jet faceplate. The impact nozzle achieves better atomization effect for complex fluid atomization and improves the combustion efficiency and specific impulse of the liquid rocket engine.