转杯纺分梳排杂区的气流场数值模拟

为探究转杯纺不同类型分梳排杂机构的排杂特征,选用自由落杂分梳腔和吸杂分梳腔体2种分梳排杂装置,通过SolidWorks建模软件分别建立物理模型,在Fluent 19.0中进行仿真模拟,分析2类排杂机构(模型I和模型Ⅱ)内气流场的速度、压强及湍动能特点对成纱过程中排杂的影响规律,并采用2种类型的纺纱器进行实验测试。结果表明:模型Ⅰ和模型Ⅱ 2种分梳腔内的压强分布均为负压,2种分梳腔内气流的速度分布不匀;其中模型Ⅰ排杂口处出现了湍动能,不利于杂质的排出,模型Ⅱ排杂区未出现湍动能变化,有利于排杂;通过纺纱实验验证了Fluent模拟结果的准确性。

Numerical simulation of airflow field in carding and trash removal zone of rotor spinning

In order to explore trash-removing characteristics of rotor spinning combing and trash removal mechanism, two types of combing and trash removal devices were selected, and a physical model was established through 3-D modeling software. Further, the distribution characteristics of air pressure, velocity and turbulent kinetic energy in these two trash removal devices were obtained and the effects of trash-removing were compared. Experiment results show that the pressure distribution in the two carding cavities of model I and model Ⅱ was negative pressure, the velocity distribution in the two carding cavities was uneven. Moreover, turbulent kinetic energy was identified at the impurity discharge port of model I, which was not conducive to the discharge of impurities. However, no change of turbulent kinetic energy was found in the trash discharge area of model Ⅱ, which was conducive to the removal of impurities. The accuracy of Fluent simulation results was validated by the spinning experiments.