文献类型：期刊文献

英文题名：Numerical Simulation on Atomizing Performance of Pressure Swirl Nozzles in Ethoxylation Reactors

作者：Shi, Zhongjing[1];Wang, Xuesheng[1];Chen, Qinzhu[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

年份：2018

卷号：16

期号：2

外文期刊名：INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING

收录：;EI(收录号：20175004538608);WOS:【SCI-EXPANDED(收录号:WOS:000424741800006)】；

语种：英文

外文关键词：nozzles; ethoxylation reactor; numerical simulation; atomizing performance; droplets size distribution

摘要：Initial breakup model(IBM) approach in conjunction with Volume of fluid(VOF) is developed to model the special nozzle in ethoxylation reactors, which has to meet the requirement of low pressure drop, high volume flow rate, little droplets size and large field. For the VOF model, Realized k-epsilon is selected and has higher accuracy of simulation for swirling flows by comparing with Standard and RNG k-epsilon models. IBM is written as a user defined function(UDF) and embedded to study the extra breakup from ligaments to droplets and forecast the droplets size distribution. As the experiments have been conducted already, the simulation results have a good agreement with the experimental results in flow rate, spray cone angle and droplets size distribution. At the same time, the atomization process and atomization mechanism of the ethoxylation reaction nozzle were analyzed. Then the VOF-IBM methodology can be used to predict the spray characteristics of the nozzles with different structure and the optimal structure for ethoxylation reaction was found by orthogonal test and fuzzy comprehensive evaluation. In addition, the primary and secondary order of the influencing factors for discharge coefficient, spray cone angle and Sauter mean diameter are respectively gained. The VOF-IBM is instructive for the optimization design of ethoxylation reaction.