基于CFD的喷气织机辅助喷嘴流场分析

 为了研究辅助喷嘴的流场性质，本文建立了喷气织机辅助喷嘴流场的三维模型，利用计算流体动力学(CFD)分析软件Fluent对辅助喷嘴流场的三维模型进行了数值模拟，得到了供气压力为0.28MPa条件下辅助喷嘴出口实际流速中心线上的速度分布曲线、压力分布曲线以及不同供气压力条件下辅助喷嘴出口的速度分布曲线。计算结果表明：供气压力为0.28MPa时，辅助喷嘴出口最大风速高达404m/s，在辅助喷嘴出口出现了负压区；随着供气压力的增加，辅助喷嘴出口风速逐渐增大，供气压力每增加0.1MPa，出口风速约增加50m/s。最后，通过与相关文献实验值的比较，证明了数值模拟方法和实验方法分析辅助喷嘴流场的一致性。

Flow field analysis of auxiliary nozzle of air-jet loom based on CFD

To analyze the characteristics of the flow field of the auxiliary nozzle,a 3-D model of the auxiliary nozzle is developed,and the analysis software Fluent based on computational fluid dynamics(CFD) is used to digitally simulate the 3-D flow field of the auxiliary nozzle of an air-jet loom.The speed distribution curve and the pressure distribution curve on the central line of the actual flow speed at the exit of the auxiliary nozzle when the supple air pressure is 0.28 MPa are obtained,along with the speed distribution at the exit of the nozzle under different supple air pressures.The results of computation show that when the supple air pressure is 0.28 MPa,the maximum flow speed is 404 m/s at the nozzle exit where a negative pressure region is formed;and the flow speed at the nozzle exit increases gradually with the increase of the supple air pressure,which is increased by about 50 m/s for each 0.1 MPa increment of supply air pressure.The comparison with experimental results of related documents shows that the numerical simulated results are in good agreement with the experimental ones of the flow field.