船用SCR反应器的非对称布置及其数值优化研究  

Numerical optimization of marine SCR reactor based on asymmetric design

作　　者：季雷 於克良 崔梦祺 何佳豪 施红[1] 刘少俊[1,2] JI Lei;YU Keliang;CUI Mengqi;HE Jiahao;SHI Hong;LIU Shaojun(School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China;College of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

机构地区：[1]江苏科技大学能源与动力工程学院,镇江212100 [2]浙江大学能源工程学院,杭州310027

出　　处：《江苏科技大学学报（自然科学版）》2022年第2期40-47,共8页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(51901088);中央高校基本科研业务费专项资金资助项目(2021QNA4011)。

摘　　要：针对船用SCR反应器在机舱空间内的紧凑布置,开展了SCR反应器结构的非对称设计.基于计算流体力学研究了扩张段弯角α与收缩段锥角β对于流动均匀性与系统压降的影响.研究表明:在未装填催化剂的情况下,随着α增加,流动均匀性与系统压降均有所增加;而随着β的增大流动压降增加的同时,流动均匀性受其影响较小.在α为45°,β为30°时,相比对称设计,流动均匀性增加72.5%的同时,压降还降低了2%.在装填催化剂后,相比装填前优选方案入口及出口段压降变化不大但流动均匀性下降,同时发现在α为60°,β为30°时相较于对称设计流动均匀性增加了83.7%,而系统压降为装载催化剂后所有方案中最低的.通过SCR反应器结构的关键参数进行分解,挑选对流场影响最大的参数开展结构设计优化,为舱内空间的紧凑布置提供了一种新的思路.Aiming at compact arrangement of marine SCR reactors,asymmetric design was adopted for the structure parameters.Based on computational fluid mechanics,elbow angleαin extension section and cone angleβin contraction section were investigated in terms of flow uniformity and pressure drop.In the absence of the catalyst,it was found that with the increase ofα,both better flow uniformity and higher pressure drop were achieved,while increasingβwould result in pressure drop ascending.However,flow uniformity showed little correlation with the angleβ.Whenαequals 45 degrees andβequals 30 degrees,compared with symmetric design,flow uniformity increased by 72.5%while 2%decrement for pressure drop was observed,which is the optimized scheme;in the presence of the catalyst,inlet and outlet pressure drop changed little in the previous optimization scheme with less flow uniformity instead.At the same time,whenαequals 60 degrees andβequals 30 degrees,flow uniformity increased by 83.7%and pressure drop reached the lowest value among all the proposed schemes.By decomposing the key parameters of the SCR reactor structure,the parameters that have the greatest influence on the flow field are selected to carry out structural design optimization,which provides a new idea for the compact arrangement of the cabin space.

关 键 词：SCR反应器 非对称设计 数值优化 

分 类 号：U664.121[交通运输工程—船舶及航道工程]