【摘要】 利用Polyflow软件模拟热塑性聚氨酯(TPU)熔体在穿孔Kenics静态混合器内的流动情况，采用正交试验分析了穿孔Kenics静态混合器的孔列数M、行数N及叶片扭转角度β对分离尺度S和压降Δp的影响。在正交试验优化的基础上，利用单因素试验分别研究混合单元长径比Ar、厚度t及入口流量Q对S和Δp的影响。正交试验结果表明，M、N和β对S和Δp的影响程度均为β>M>N,其中，β和M为S的显著影响因素，而β为Δp的显著影响因素。与标准型Kencis静态混合器相比，优化后的穿孔Kenics静态混合器分别使S降低了19.2%,Δp降低了26.7%。单因素试验结果表明，S随着Ar和t的增加而减小，随着Q的增加而增大；Δp随着Ar、t和Q的增加而增大。更多还原

【Abstract】 Polyflow software was used to simulate the flow of thermoplastic polyurethane(TPU) melt in perforated Kenics static mixer. The effects of perforation column number M, row number N, and blade twist angle β on segregation scale S and pressure drop Δp of perforated Kenics static mixer were analyzed using orthogonal experiment. Based on the orthogonal optimization, the effects of mixing element aspect ratio Ar, thickness t and inlet flow rate Q on S and Δp were studied using single factor experiment. The orthogonal experiment results showed that the order of influencing S and Δp was β>M>N, in which β and M were significant factors of S, and β was the only significant factor affecting Δp. Compared with the standard type, the optimized perforated static mixer had a drop by 19.2% and 26.7% in S and Δp, respectively. The single factor experiment results showed that S decreased with the increase of Ar and t, and increased with the increase of Q; Δp increased with the increase of Ar, t, and Q.更多还原