Test and analysis on airflow state in reed groove of air jet looms

The air speed in reed groove is tested to analyze the influence of process parameters on the airflow field in reed groove.The relation between air speed and spray length of auxiliary nozzle,spray angle of auxiliary nozzle or supply pressure of auxiliary nozzle is investigated.In this article,the pitot tube is applied to test the air speed in reed groove by an instrument designed by the researchers themselves.At the same time,the change of air speed with the supply pressure is also studied.The results indicated that the air speed in reed groove fluctuates drastically and periodically with the distance of auxiliary nozzles.When the supply pressure is too low,the air speed in reed groove could not satisfy the weft insertion requirement.In the same section of reed groove,velocity varies with testing positions and so does the force acting upon the weft.