抄録
In order to make clear the air flow in the yarn duct, which has the maximum effect on the generation of interlaced yarns, the flow near to the yarn duct wall and the jet issuing from a circular air jet nozzle were measured in basic type interlacers with various diameters and lengths of yarn duct. The jet issuing from the air jet nozzle forms a detached shock wave in front of the yarn duct wall opposite to the air jet nozzle. After running against the yarn duct wall, the air forms two twin spiral eddies in the yarn duct. The diameter ratio of yarn duct to air jet nozzle has an effect on the jet width and the circumferential component of the flow velocity and hence it has a greater effect on the processability of interlaced yarns than the yarn duct length.
