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二、应用杜克勒法计算混输管路的源程序(PC—1500Basic语言) 1.R_l—Re_(ip)—H_l关系图的回归按杜克勒法用计算机解两相混输管路工艺参数时,图2的回归是个关键。首先应把图2上各条曲线(即在某一雷诺数下R_l和H_l的图示关系)变成数学表达式。为此将图2的双对数坐标系统转换成笛卡儿坐标系统。设:笛卡儿坐标系统的横坐标为x、纵坐标为y。由图2可知:
Second, the application of Duke Le law mixed pipeline calculation of the source code (PC-1500Basic language) 1.R_l-Re_ (ip) -H_l regression chart by Duke Le law using computer solution of two-phase mixed pipeline technology When the parameters, the regression of Figure 2 is the key. First of all, the curves in Figure 2 (that is, a certain Reynolds number Rl and Hl graphic relationship) into a mathematical expression. For this purpose, the double logarithmic coordinate system of Figure 2 is converted into a Cartesian coordinate system. Set: Cartesian coordinate system for the x-axis, vertical axis y. From Figure 2 we can see: