凝聚槽类型对转杯内气流场影响的数值模拟

为探究G、T、U、S型凝聚槽对36 mm直径转杯内气流场的影响,在软件Fluent中对三维流场进行数值计算分析。结果表明:在相同工艺条件下,凝聚槽在1周(0°~360°)范围内,4种槽型的速度大小为G型T型U型S型,在0°与360°位置处静压大小为G型S型U型T型,其余各角度位置处静压大小为S型U型T型G型。各槽型内气流静压和速度趋势基本一致,以T型槽为例,输棉通道内的静压位于-32 886.15~18 224.56 Pa之间,转杯内的静压大部分处于-13 719.63~-7 330.80 Pa之间;输棉通道内的气流随着管道直径的减小而加速运动,在出口处达到最大值261.81 m/s。

Numerical simulation of influence of groove type on flow field inside rotor

The influence of groove type on high speed airflow during rotor spun yarn was investigated.Airflow speed and static pressure in four types of groove,such as G,T,U and S of the 36 mm diameter rotor,were studied by Fluent software.The results show that under the same conditions,speeds in four groove size are G ＞T ＞ U ＞ S within the range from 0° to 360°.In 0° and 360° position,the static pressures are G ＞ S ＞ U ＞ T.While for the rest of the angle position,the static pressures are S ＞ U ＞ T ＞ G.Taking T groove as example,static pressures within the transfer channel are between-32 886.15 Pa and 18 224.56 Pa,static pressures within the rotor are between-13 719.63 Pa and-7 330.80 Pa.The airstream accelerates from the transfer channel inlet to the outlet with the decrease diameter of the pipe,and reaches the largest value to 261.81 m/s at the outlet.