Modified Dual Rectangular Jets for Fiber Production

Velocity fields were measured below two parallel, rectangular air nozzles. The following five die (nozzle) types were tested: (1) a die where the jets met at a 60° angle and the die tip was blunt, (2) a die with a 60° angle and a sharp tip, (3) a die with a 70° angle and a sharp tip, (4) a sharp 60° die with an inset, and (5) a sharp 60° die with an outset. Since the dies had a large length-to-width ratio, the velocity fields approximated that of a two-dimensional jet. Correlations were developed to predict the velocity fields below these die types.