实压管道内天然气体积流量的PIV测试  

Measurement of natural gas in actual pressure pipelines using PIV system

作　　者：刘艳[1] 董守平[1] 

机构地区：[1]中国石油大学(北京)机电学院流体测试实验室,北京102249

出　　处：《实验流体力学》2007年第2期74-77,共4页Journal of Experiments in Fluid Mechanics

基　　金：中国石油西南油气田分公司天然气管道内流场特性对计量性能影响研究(040401)

摘　　要：利用PIV测试技术对DN100天然气水平管道内0.8MPa下的实流流场进行测试研究,得到旋度场、速度矢量场等。以实测速度矢量场的空间平均值拟合出圆管横截面上的主流速度分布并积分求得管流截面上的瞬时积分流量。试验通过连续测量发现了流场的瞬时流量存在明显的脉动特征;而在较长周期内采集到的瞬时流量呈正态分布,其平均值与声速喷嘴流量一致,测量精度与超声流量计相当。测试结果显示:该PIV系统可以用于体积流量计量,而较长周期内的瞬时流量均值可以作为标准流量。An experimental investigation of natural gas pipe flow was performed under 0.8MPa by means of particle image veloeimetry（PIV）. The vortieity field , velocity field ete, can be obtained using PIV system. The velocity profile on the cross - section of the pipeline, whieh＇s fitted by the spatial average value of the measured velocity, can be further integrated to get the volume integral flux. The integral flux of continuous measurement is impressively fluetuant and satisfies Gaussian distribution, and the mean flux in a longer period agrees with the nozzle flux, and the precision is correspond to that of uhrasonie wave flowmeter. Those confirm that the PIV system can successfully be applied in volume flux measurement and the mean flux can be used for the standard flux.

关 键 词：PIV测试 天然气 实压实流 体积积分流量 

分 类 号：O357[理学—流体力学] TH814[理学—力学]