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摘要
In order to study the effect of orifice angle of vortex tube on yarn forming in jet vortex spinning, eight levels of nozzle angle are designed, from 40 degrees to 65 degrees, and the corresponding three-dimensional computational fluid dynamics (CFD) models are established to conduct the numerical simulation of the airflow in the nozzle. Through the analysis of numerical simulation, the pressure and velocity distribution are made clear which provides reference for the future design of the vortex tube. Simulation results show that when the orifice angle is around 50 degrees, the airflow state within the nozzle has a large negative pressure with appropriate axial and tangential velocity, which is conducive to the formation of the open ends of fibers and twisting, and the yarn quality is better. Spinning experiment results prove that single yarn strength is the maximum, the irregularity of single yarn strength is the minimum, and other yarn properties are superior with the orifice angle at 50 degrees, which shows a good agreement with the simulation results.
- 出版日期2013-12-1
- 单位东华大学
