数值分析网孔罗拉气动式紧密纺纱纤维集聚区内的气流流动特征

采用大型流体计算软件模拟网孔罗拉气动式紧密纺纱纤维集聚区内的气流流动状态．并基于数值模拟结果分析了网孔罗拉气动式紧密纺纱纤维集聚区内的气流流动特征、分析认为由于气流吸聚槽自牵伸钳口线位置开始向纤维集聚区左侧倾斜，导致气流吸聚槽左右两侧气流流动方向不同，且气流流动速度差异显著，因此在气流吸聚槽处形成的气流汇聚线更靠近气流吸聚槽的右侧边缘，揭示了网孔罗拉气动式紧密纺纱实践中，被集聚的纤维须丛总是位于靠近气流吸聚槽右侧位置的原因。

Simulation analysis of air flow patterns inside fiber condensing zones of pneumatic compact spinning technology

CFD technique was employed to simulate air flow inside fiber condensing zones of pneumatic compact spinning technology with perforated roller, and air flow patterns inside fiber condensing zones was analyzed depending on simulation results. The experiments indicated that air flow directions and velocities in both sides of suction slot were different because the suction slot was deflected to left margin of fiber condensing zone from draft nip, so that a profile line consisting of converging points of flow air was a curve and rather close to right margin of the suction slot, that＇ s why the condensing fiber strand was positioned close to right margin of the suction slot during spinning process on pneumatic compact spinning machine with perforated roller.