Analysis of factors influencing flow field in reed groove of air jet loom

Since the measurement of the air velocity in reed groove can be used to analyze the influence of process parameters on the weft insertion,a test device—a Pitot tube to measure the air velocity at different positions in reed groove was designed.The adjusting range of jet angle and relay nozzle distance were studied.The results indicated that there are different velocities at different positions.When the supply pressure is(2 ～ 4) × 105 Pa,the jet angle of relay nozzle could not be 5°,or the air velocity for weft insertion will be too low.Shortening the relay nozzle distance is helpful to improve the average air velocity in reed groove,and when the relay nozzle distance is 65 mm,the air velocity in reed groove can completely satisfy the weft insertion requirement of 100 m /s.