Improving airflow loss through the yarn-loading slit of the air-interlacing nozzle using TRIZ

Abstract

The air-interlacing nozzle has a yarn channel, an air inlet and a yarn-loading slit. The previously investigated optimum air-interlacing nozzle was analyzed to improve the airflow loss through the slit by reducing the width of the slit and by applying TRIZ tool. TRIZ, the theory of inventive problem solving, was applied to find a solution for the airflow loss through the yarn-loading slit. The airflow inside the air-interlacing nozzle was computed using ANSYS CFX software. The computational results of the air-interlacing nozzle were evaluated by the vorticity, velocity and the airflow loss. The vorticity was increased and the airflow loss was improved slightly when the width of the slit was reduced. The yarn-loading slit is for the yarn loading into the yarn channel before the air-interlacing process. The technical contradiction of the air-interlacing nozzle was that reducing the width of the yarn-loading slit makes it difficult to load the yarn into the yarn channel. Principles 10 and 31 of TRIZ were obtained through the contradiction matrix and were applied to the nozzle. The computational results showed that the vorticity and velocity were increased and the airflow loss through the slit was improved. The air-interlacing nozzle after applying principles of TRIZ showed better results when compared numerically and experimentally with other existing nozzles.