Air Jet Nozzle Design and Fluid Dynamics
topic
Air texturing jet nozzles use supersonic or subsonic air flow at 4 to 8 bar air pressure through venturi-designed nozzle geometries that create a turbulent core flow zone where individual filaments are separated, looped, and entangled by the turbulent velocity gradients, with nozzle geometry including throat diameter, divergence angle, and side entry yarn channel design determining the texturing efficiency and loop size distribution produced at each air pressure.
Role
Determines the texturing intensity and loop structure characteristics of air-textured yarn through the turbulent air field geometry within the nozzle that governs filament separation and loop formation, with nozzle design being the primary engineered variable in air texturing since it cannot be adjusted during production and must be selected for each yarn count and filament number combination to achieve the required loop density and size.