示踪气体混合均匀性的试验研究  

Experimental study on the mixing uniformity of tracer gas

作　　者：曾宪阳[1] 池作和[1] 郑明广[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2期132-137,共6页Journal of China Jiliang University

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

摘　　要：为探讨示踪气体与被测气体实现均匀混合的条件,以CO作为示踪气体,以空气作为被测气体,在直径为0.300 m的90°弯曲管道内对示踪气体与空气的混合均匀性进行了试验研究.结果表明,在本试验条件下,当混合气体流速大于3.2 m/s时,在弯管下游的12D(D为管道内径)和15D处,示踪气体的径向和轴向平均体积分数误差小于4%,示踪气体的实测平均体积分数与理论值趋于一致,可认为示踪气体与空气的混合达到了均匀.因此,工业气体的管道输送过程中采用示踪法校准气体流量计时,可在满足上述条件的位置处作为取样点.In order to study the mixing uniformity between tracer gas and gas stream,experiments in a 0.300 m internal diameter and 90°bending duct were presented,which CO and air selected as tracer gas and gas stream.The results showed that the mixing between the tracer gas and air was considered to be uniformed downstream of the bending duct at the sampling point of 12D(D is the internal diameter of pipe) and 15D when the flow rate above 3.2 m/s,which the relative errors of the radial and axial tracer gas average volume fractions were below 4%,and the measured average volume fractions of the tracer gas within the theoretical ones.Therefore,the sampling points of the duct can be set at the locations that satisfied by the above conditions when gas flowmeter calibration with tracer gas technique on the industrial gas pipeline transportation.

关 键 词：示踪气体 气体流量计 均匀混合 

分 类 号：TB9-55[一般工业技术—计量学]