限流孔板计算

已知条件流量QNmax：25m3/hQNcom：20m3/hQNmin：15m3/h工作温度t120OC工作压力P1600Kpa压力损失=4Kpa管道内径D2027.7mm管材线胀系数1.6600E-05mm/mmOC辅助计算流量标尺上限Q2020m3/h-98.1579本地大气压Pa100Kpa管道内径D27.7000mm气体压缩系数Z0.99973绝对温度T1293.15K绝对压力P1700Kpa标况密度1.25kg/m3工况密度8.6383kg/m3标况粘度0.01766cp粘度系数1工况粘度0.01766cp等熵指数1.4管道粗糙度K0.1000D/K277工况流量Qmax：2.8941m3/hQcom：2.8941m3/hQmin：2.1706m3/hReDmin13568.56957ReDcom18091.42609确定差压上限P8Kpa圆整P8KpaP2/P10.9886Pcom8.0000Kpa(a0B2)10.03100.0006B10.0310r01rRe1(a0B2)20.03120.0006B20.0310d0.8587Qcom：0.05332.8941Dq-98.1579%确定差压上限P8.0000Kpa孔板开孔直径d20:0.859mm加工公差0.0004mm最大压力损失7516Pa通常压力损失7516Pa443mm97mm管道内径D2027.7000mm0.0310a00.5985409210.6223314630.5985408430.5960513000.5213088000.0067222610.0310000000.0000000798.8821000000.4540664000.2195073000.00000000017.2648400001.5901570000.616823100下游最小直管段孔板开孔直径比B^4上游最小直管段%1.21.241.4EK0.10.99120.99190.00000.9918999940.9920749940.9925999940.20.99050.9912E0.99261.7664380000.0469114400.00437504719.9792600001.0314390000.747840000