天然气流量计算测量管内径：D20=149mm 天然气的组分孔板开孔直径d20=79.465mm组分甲烷乙烷丙烷气流温度t=26.3℃摩尔分数0.80370.14370.0122气流差压△P=9500Pa Gi=0.6606∑Xj√Bj=0.05043气流压力P表=0.45MPa Zn=0.9975Za=0.99963当地大气压P大=0.0866MPa P1=0.5366孔板开孔直径d=79.47331管径D=149.0105直径比β=0.53334Gr'=0.66201 实测流量Qn=3954.101相对密度Gr=0.6620140.685等熵指数k=1.36需查表动力粘度u=0.01096需查表0.953311386初始流出系数C’=0.603509渐近速度系数E=1.04309相对密度系数FG=1.229041可膨胀性系数ε=0.994294Kt=5.067 当0.84≤τ＜1.09且P≤8.963MPa（绝）时KP=-0.72344E1=1.00Ft=0.96792 当0.88≤τ＜1.09且13.79≥P＞8.963MPa（绝）时FP=1.007554E2=1.00tj=62.03774 当1.4≤τ＜1.09且P≤13.79MPa（绝）时pj=65.76106E3=#NUM!τ=1.044075H=0.080461E’=m=0.023866n=6.486551B=1435.213b=318.12带E1时根据τ、P的范围D=52.95984超压缩因子FZ=1.005131流动温度系数FT=0.9425流量近似值Q‘=1.0969雷诺数ReD=680296.3流出系数C=0.604313丁烷0.0022甲基丙烷戊烷2甲基丁烷0.00120.0010.0007已烷0氢气0氦气氮气二氧化碳0.03070.0048氧气氩气
