90°弯管内示踪气体混合均匀性的数值模拟与实验研究  

Numerical simulations and experimental study of the mixing uniformity of tracer gas in 90° bend pipe

作　　者：郑明广[1] 曾宪阳[1] 池作和[1] 王进卿[1] 

机构地区：[1]中国计量学院计量测试工程学院,浙江杭州310018

出　　处：《中国计量学院学报》2011年第4期332-336,355,共6页Journal of China Jiliang University

基　　金：国家质检总局科技计划项目(No.2010QK402);浙江省教育厅科研项目(No.Y200909294);浙江省第一批省级重点科技创新团队项目(No.2011R09024-06)

摘　　要：示踪气体在管道内的混合均匀性,对示踪法测量气体流量的准确性或者在线校准管道气体流量计的校准精度影响很大.在直径为300mm的90°弯曲管道内,对示踪气体CO与空气的混合情况进行了数值模拟研究,并与实验结果进行了对比分析.结果表明,五孔释放混合效果明显要好于单孔释放,且五孔释放时弯管下游9D处示踪气体与空气混合基本均匀.数值模拟结果和实测结果基本吻合,可为示踪法测量气体流量和在线校准管道气体流量计提供参考.Numerical simulations of the CO tracer gas and air mixing in a 300mm diameter and 90-degree bend pipe were performed on Computational Fluid Dynamics software platform,and the comparisons between the simulation results and experimental data were analyzed.The results shown when the tracer gas injected by five injections,the mixing effect between tracer gas and air was better than the single injection,and the tracer gas and air have been mixed uniformity downstream of the bend on 9D.Simulation results can provide valuable guidance for measurement gas flow rate and online calibration for gas flowmeter with tracer gas technique.

关 键 词：示踪气体 气体流量计 数值模拟 90°弯管 

分 类 号：TB937[一般工业技术—计量学]