Controlling air vortex in air-vortex spinning by Zeng-He model

Using Zeng-He model, we present a simple analytical formulation for the forces that determine the strength of the air vortex twist acting on the yams during air-vortex spinning as a function of nozzle pressure, flow rate, the radius of the main nozzle in the horizontal plane, nozzle pressure, jet orifice angle, the number of the orifices, jet orifice angle, diameter of the jet orifice, and the distance from the top of the twisting chamber to the spindle. Comparison with the numerical results shows the effectiveness and convenience of the model.