Numerical and Experimental Study on Reducing Yarn Hairiness with the JetRing and JetWind

Abstract

JetRing and JetWind techniques, which use air-jet nozzles to reduce yarn hairiness, are the latest innovations in spinning and winding of staple yarns. The reduction of yarn hairiness is investigated in this paper both numerically and experimentally. A two-phase air/fiber flow model is developed to simulate the wrapping of a protruding surface hair in the nozzle. The effects of nozzle pressure and jet orifice angle on yarn hairiness are studied by both theoretical predictions and experiments. The results show the consistency of the numerical and experimental study.