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天然气长输管道运行中沿直线段的平均温度是计算天然气管道输送能力、管道内气体储存量及其它一些参数的重要指标。初始数据为管道两端的温度与压力测量数值。以舒霍夫公式为基础的现行方法由于忽略焦耳-汤姆森效应,故精确度不高,尤其当天然气在管道末端的温度低于周围介质温度时,对数函数的自变量会出现负值而不能进行计算。为消除这一现象而进行的修正也未能提高精确度。另
The average temperature along a straight section of natural gas long-distance pipeline operation is an important index for calculating natural gas pipeline transportation capacity, gas storage in pipeline and some other parameters. The initial data is the temperature and pressure measurements at both ends of the pipe. The current method based on Schuhov formula ignores the Joule-Thomson effect, so the accuracy is not high. Especially when the natural gas temperature at the pipe end is lower than the surrounding medium temperature, the argument of the logarithm function will be negative Can not be calculated. Amendments to eliminate this phenomenon also failed to improve accuracy. another