Abstract In order to investigate the effect of the slot ends of the melt-blowing die on the three-dimensional airflow field distribution and the fiber draft, the numerical calculation was carried out. The computational domain of the slot die was established with Gambit, and the flow field was calculated using FLUENT. Compared with the experimental data collected by a hot-wire anemometer, the numerical calculation results are credible. The results show that the slot end face has a certain influence on the three-dimensional flow field distribution under the melt-blowing die. The air velocity and temperature in the center region are quite different from those near the slot-end face. As the distance from the center of the flow field increases, the velocity and temperature on the spinning line begin to decrease. The velocity and temperature distributions of the spinning lines in the central area and nearby areas are almost the same; the temperature and velocity values on the spinning lines near the slot end are the lowest. The distribution characteristics of the three-dimensional airflow field could affect the uniformity of the fiber diameter and the meltblowing products.

中文翻译：

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狭缝端面对熔喷模三维气流场的影响

摘要 为研究熔喷模槽端对三维气流场分布和纤维牵伸的影响，进行了数值计算。槽模计算域用Gambit建立，流场用FLUENT计算。与热线风速计采集的实验数据相比，数值计算结果可信。结果表明，狭缝端面对熔喷模下的三维流场分布有一定的影响。中心区域的空气速度和温度与槽端面附近的空气速度和温度有很大不同。随着距流场中心的距离增加，纺丝线上的速度和温度开始降低。中心区和邻近区纺丝线的速度和温度分布几乎相同；靠近槽口的纺丝线上的温度和速度值最低。三维气流场的分布特性会影响纤维直径的均匀性和熔喷产品。