摘要
为探究不同入口结构对异性纤维分拣机输棉通道内气流速度分布的影响,提高棉流稳定性,采用数值模拟分析的方法,利用Fluent软件分别对弯曲通道、直通道、入口角度、通道截面高度以及不同扩张角的扩散器进行模拟分析,得到不同入口通道内的速度云图、压力云图和检测通道内速度曲线。结果表明:在弯曲通道内存在静压差导致轴向速度在异性纤维检测通道0~0.4 m内不均匀分布;减小通道入口角度能够减小检测通道0.1~0.3 m内的轴向速度波动,并加快轴向速度趋于稳定;降低截面高度会直接减小棉流厚度,但会延长速度趋于稳定的通道长度;扩散器能够有效地使棉流靠近通道中心位置,对比不同扩散器,扩张角a=11°,b=7°时扩散器效果最优。
In order to explore the effects of different entrance structures on the flow speed distribution in the cotton conveying channel of the foreign fiber sorter,and improve the stability of cotton flow,numerical simulation analysis method was adopted,and Fluent software was used to simulate and analyze bending channel,straight channel,entrance angle,channel section height and fan diffuser with different divergent angles.The velocity cloud map,pressure cloud map and velocity curve in different inlet channels were obtained.The results show that the axial velocity was not evenly distributed within 0~0.4 m in the foreign fiber detection channel due to the static pressure difference in the curved channel.Lowing the entrance angle of the channel could reduce the axial velocity fluctuation in the detection channel within 0.1~0.3 m,and accelerate the stability of the axial velocity.Lowing the section height of the channel directly reduces the thickness of cotton flow,but lengthens the channel length whose velocity tends to be stable.The fan diffuser could effectively make the cotton flow closer to the middle of the channel,compared with different fan diffusers,when a=11°and b=7°,fan diffusers had the best effect.
作者
姜博艺
孙戬
张守京
胡胜
JIANG Boyi;SUN Jian;ZHANG Shoujing;HU Sheng(School of Mechanical and Electrical Engineering,Xi’an Polytechnic University,Xi’an 710048,China;Xi’an Key Laboratory of Modern Intelligent Textile Equipment,Xi’an 710048,China)
出处
《西安工程大学学报》
CAS
2021年第2期48-53,59,共7页
Journal of Xi’an Polytechnic University
基金
中国纺织工业联合会科技指导性项目(2020072)
西安工程大学博士科研启动基金(BS201804)
西安市现代智能纺织装备重点实验室建设项目(2019220614SYS021CG043)。
关键词
异性纤维分拣机
输棉通道
数值模拟
速度波动
扩散器
foreign fiber sorter
the cotton conveying channel
numerical simulation
speed fluctuation
fan diffuser
