摘要
采用标准kε湍流模型和有限容积法以及SIMPLE算法对集聚纺装置中负压斜槽周围气流速度场的分布状态进行数值模拟,并根据实际纺纱装置设计出可供测量气流速度场的实验模型,利用粒子图像测速(PIV)技术测量实验模型中的气流速度值,对数值模拟结果进行了实验验证。实验结果表明:在沿着z轴的方向上,越靠近斜槽(即z值越小)的位置,气流速度就越大,而且每个速度平面上的理论模拟值和实验测量值之间都存在一定的差异。但这种差异的总体趋势是相同的,即都是测量值小于理论值。同时,斜槽右侧的速度值要大于其左侧的速度值,而且缝隙左右两侧速度方向的差异很大,左侧气流几乎平行于纤维须条的出流方向,而右侧气流则倾向于垂直于纤维须条的出流方向。这表明数值模拟结果与实验结果基本吻合,可以用标准kε湍流模型对集聚纺技术中的气流速度场进行较深入的研究。这一研究结果完善了集聚纺纱技术的成纱机理,为进一步研究纺机制造、纺纱生产和产品开发提供了理论依据和指导。
The objective of this paper is to simulate the turbulent air-flow in the condensing field of the compact spun process. The method used in this paper is that Turbulence k-ε model with finite volume method and the SIMPLE computational algorithm are used to study the air-flow field in compact spun technology. In order to check the simulation result, a test device is designed according to the actual compact spun frame, and then the Particle Image Velocimetry （PIV） is used to measure the velocity of the air-flow field in the test device. The final result shows that the velocity of the air-flow planes decreases along the z axis, and every measured value is smaller than the simulated value at the same plane. The direction of both the measured and simulated velocities on the left side of the inclined slot is almost parallel to the drawing out direction of the fiber strand while it is almost vertical to the drawing out direction of the fiber strand on the right side of the inclined slot. This result proves that the standard k-ε model can be used to simulate the pneumatic compaction in compact spun process exactly. This conclusion supplies reliable researching method and theory to researchers who will further study the compact spun process and develop the compact spinning machinery and new production.
出处
《青岛大学学报（工程技术版）》
CAS
2005年第4期74-79,共6页
Journal of Qingdao University(Engineering & Technology Edition)
