摘要
用Fluent软件对水和甲苯液-液两相撞击流进行了模拟,研究了浸没状态下液-液两相撞击流的浓度场,用不均匀系数比较和分析了不同截面的浓度场,研究了不同进口流量（Q）、喷嘴直径（D）和两喷嘴间距（L）下浓度场的变化规律.结果表明,随进口流量增加,不均匀系数先增加后减小,Q=300和800 L/h时不均匀系数均低于0.04;随两喷嘴间距增加,不均匀系数持续增加,L≤3D时不均匀系数均小于0.05,液-液两相撞击流在小喷嘴间距下混合效果好;随喷嘴直径增加,不均匀系数先减小后增加,在D=10 mm时最佳.
The numerical simulation of water and toluene two-phase impinging stream was performed by Fluent software to investigate the characteristics of concentration field of submerged liquid-liquid two-phase impinging stream. The concentration field of different sections was compared and analyzed by non-uniformity coefficient. The variation rules of concentration fields under different inlet flow rates（Q）, inlet diameters（D） and two nozzle spacings（L） were obtained. The results showed that the non-uniformity coefficient increased first and then decreases with the increase of inlet flow rate. When Q=300 and 800 L/h, the non-uniformity coefficient was less than 0.04. With the increase of two nozzle spacing, the non-uniformity coefficient continued to increase. The non-uniformity coefficient was less than 0.05 when L≤3D. This phenomenon showed that liquid-liquid two-phase impinging stream had well mixing effect with small nozzle spacing. With nozzle diameter increasing, non-uniformity coefficient increased firstly and then decreased with the best value at D=10 mm.
出处
《过程工程学报》
CAS
CSCD
北大核心
2018年第1期57-62,共6页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:21476141)
关键词
撞击流
浓度场
两相流
混合
数值模拟
impinging stream
concentration field
two-phase flow
mixing
numerical simulation
