静电纺丝是制备纳米纤维的主要方法之一，喷头的结构和组装决定了纺丝的质量和产量，尺寸的合理设计可以有效提高纺丝的生产效率。采用Fluent数值模拟方法对十针直列式喷头结构进行尺寸选型研究，结合工程需要选择6组喷针直径，6组喷针长度，5组入口流量，正交计算了180个模型，得到了不同喷针长度，不同喷针直径在不同入口总流量情况下喷头结构中的偏流量和偏流率。分析喷针直径和喷针长度对出口偏流率的影响，并结合不同工况，给出了合理的喷头结构尺寸选型方案。

Electrostatic spinning is one of the main methods of producing nanofiber, the structure of the nozzle and assembly decides the spinning quality and production, and the reasonable design of size can effectively improve the spinning efficiency. The selection research on ten-needle inline nozzle is performed by using numerical simulation method. Combing the actual requirement of engineering, total 180 orthonormal models including six groups of needle diameters, six groups of needle lengths and five groups of inlet flux are calculated. Then the partial flow and drift rate in nozzle structure are obtained under the conditions of different inlet flow, different needle diameters and different needle lengths. The influence of nozzle diameter and length on exit drift rate is analyzed, and according to different working conditions, the reasonable size selection scheme of nozzle structure is given.