地形高程差对天然气输送管道工艺计算的影响

通过对气体稳定流动基本方程组进行解析求解,给出了考虑地形高程差影响的输气管道精确计算公式、简化计算公式和水平管计算公式.通过数值计算,研究了地形高程变化对天然气输送管道工艺计算的影响.结果表明,地形高程变化对管道压降计算的影响比较明显,而对管道直径和输气能力计算的影响不太明显,当高程差大于200m时,应该考虑高程差对天然气输送管道工艺计算的影响.结果为天然气输送管道设计的工艺计算提供了理论基础.

Effect of topographic height difference on the technological calculation of natural gas transportation pipeline

The accurate formula for the technological calculation of natural gas transportation pipeline is presented through solving the basic equation group of gas steady flow,in which the effect of the topographic height difference is considered.The simplified expression of the accurate formula and the corresponding formula for the technological calculation of horizontal pipeline are also presented.The effect of the topographic height difference on the technological calculation of natural gas transportation pipeline is studied through numerical calculation.The results show that the topographic height difference has obvious effect on pressure drop,but it has little effects on the calculation results of pipeline diameter and gas flow rate,its effect on the technological calculation of natural gas transportation pipeline should be considered when the topographic height difference is greater than 200 m.The result in this paper can provide theoretical basis for the design and technological calculation of natural pipeline.