论文部分内容阅读
在ISO5167-1和GB/T2624-93这两份标准文件中,都列入了确定差压式流量计参数的内容,实质上这是一个超越方程的数值求解问题。这两份文件均选择了割线法求解,这是正确的;但在如何正确地应用割线法求解计算流量的基本方程中,此二标准都存在一些问题,影响到所求参数时的正确性及有效性。为此,本文探讨了割线法的实质、有关其收敛性的分析及其在确定差压式流量计参数时的正确应用,这对于正确地推广运用这两个标准文件有着重要的意义。
In both standard documents ISO5167-1 and GB / T2624-93, the inclusion of parameters to determine the differential pressure flowmeter is included. In essence, this is a numerical solution to the transcendental equation. It is correct that both of these documents choose the secant method, but there are some problems with the two equations in the basic equations of how to correctly apply the secant method to calculate the calculated flux, which affects the correctness of the parameters Sexuality and effectiveness. Therefore, this paper discusses the essence of secant method, its convergence analysis and its correct application in determining the parameters of differential pressure flowmeter, which is of great significance for the correct popularization and application of these two standard documents.