论文部分内容阅读
基于breakup和collision液滴破碎模型采用Fluent和Gambit软件对平口喷嘴的真空射流雾化进行了模拟,研究了环境压力、喷射压力和喷嘴直径等参数对射流雾化结构和液滴索特平均直径(Sauter mean diameter,SMD)的影响。结果表明:①随着环境压力的降低,喷射束宽度减小,射流贯穿距离和SMD增加。当环境压力小于0.01 MPa时,各雾化性能参数的变化幅度减小;②环境压力和喷嘴直径一定,随着喷射压力的增加,喷射束宽度呈先快速后缓慢增加的趋势,而射流贯穿距离近似线性增加,SMD值变化不明显;③喷嘴直径越小,喷射束宽度和射流贯穿距离越大,SMD值越小,射流雾化效果越好,更易制备出光滑致密的聚合物薄膜。
Based on the breakup and collision droplet breakup models, Fluent and Gambit software were used to simulate the vacuum jet atomization of a flat nozzle. The influence of environmental pressure, jet pressure and nozzle diameter on the jet atomization structure and the average diameter of the droplet Sauter Sauter mean diameter, SMD). The results show that: (1) With the decrease of ambient pressure, the jet beam width decreases, the jet penetration distance and SMD increase. When the ambient pressure is less than 0.01 MPa, the change range of each atomization performance parameter decreases. (2) The ambient pressure and nozzle diameter are certain. With the increase of injection pressure, the jet beam width increases slowly first and then slowly, and the jet penetration distance The change of SMD value is not obvious; (3) The smaller the nozzle diameter is, the larger the jet width and the jet penetration are, the smaller the SMD value is, the better the jet atomization effect is, the more smooth and compact polymer film is easier to be prepared.