基于FLUENT的超临界二氧化碳清洗釜流场模拟及试验验证  

Flow Field Simulation of Supercritical Carbon Dioxide Extractor Based on FLUENT and Experimental Verification

作　　者：余跃[1] 刘伟嵬[1] 王新[2] 李明政[1] 原应春 张洪潮[1] 

机构地区：[1]大连理工大学 [2]北方重工集团有限公司

出　　处：《内燃机与配件》2018年第3期131-133,共3页Internal Combustion Engine & Parts

基　　金：中央高校基本科研专项资金(No.DUT16QY21);国家重点基础研究发展计划(973计划)(NO.2011CB013402);国家自然科学基金:基于激光辐照法的电动汽车锂离子电池再制造的机理研究

摘　　要：在超临界CO_2清洗废旧发动机零部件的过程中,超临界CO_2去除污垢的方式主要有溶解可溶性污垢、冲蚀零件表面污垢。清洗工艺参数中流量的大小会通过影响单位时间超临界CO_2流体溶解的溶质量来影响溶解作用和冲蚀作用的强弱。但传统超临界清洗釜结构上的不足,导致超临界CO_2流体流场中的清洗对象处于低流速区域,造成萃取率偏低。本文利用FLUENT软件,模拟了不同结构清洗釜的流场,比较分析四种情况下的流速分布,对清洗釜进行结构改造,采用隔板结构,改变超临界CO_2流体流场分布并选取最佳清洗区域。同时在实验室条件下测得,改进后的清洗釜结构有效地提升了超临界清洗效率,与模拟分析得到的结果相符。In the process of cleaning used engine components, the technique of supercritical CO_2 cleaning method can remove pollution mainly by dissolving the soluble stains and eroding the dirt on the surface of the components. The flow has effect on the dissolution and erosion results by affecting the amount of dissolved solute in the supercritical CO_2 fluid per unit of time while working. However, the traditional supercritical cleaning kettle has structural deficiencies, resulting that supercritical CO_2 fluid field cleaning objects has been in a low flow rate region and make it that in low extraction rate. In this paper, the structure of the cleaning kettle is modified. The structure of the separator is adopted to change the flow field of the supercritical CO_2 fluid and select the best cleaning area. FLUENT software was used to simulate the flow field with different depths of partitions and to compare the flow field under the four conditions. Simultaneously, the improved cleaning kettle effectively enhanced the supercritical cleaning efficiency when it was measured under laboratory conditions, which was in good agreement with the simulation results.

关 键 词：FLUENT 超临界CO2 清洗釜 结构改进 

分 类 号：U464[机械工程—车辆工程]