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离心泵特性曲线的测定是化工原理的重要内容,涉及到伯努利方程和连续性方程在流体流动中的实际应用,公式复杂,计算量大。本文利用C语言的强大结构化编程和计算功能,处理了“离心泵特性曲线的测定”实验数据,给出了程序设计的思路和方法,得到了离心泵的特性曲线。从曲线可以看出,随着流量的增大,离心泵的压头减少,轴功率升高,和教材完全一致。而离心泵的效率随流量增大而增大,并未出现先增大后减小的情况,可能是由于流量较小所导致。通过分析曲线可以得到离心泵操作相关的知识,离心泵必须在流量较小的区域工作才能获得较大的压头,大流量的离心泵需要配置大功率的电机,离心泵启动之前应关闭出口阀等。此外还发现压力表和真空表的读数随流量的增大而变小,解释了此现象。该程序结构简单,维护方便,通过简单修改可用于处理其它化工原理实验的数据,充分发挥了C语言的特长来解决化工原理计算复杂的特点。
Centrifugal pump characteristic curve is an important part of chemical principles, involving the Bernoulli equation and continuity equation in fluid flow in the practical application, the formula is complex, large amount of calculations. In this paper, the powerful structured programming and calculation function of C language is used to deal with the experimental data of the determination of the characteristic curve of the centrifugal pump. The idea and method of program design are given, and the characteristic curve of the centrifugal pump is obtained. Can be seen from the curve, with the flow rate increases, reducing the pressure head of the centrifugal pump, shaft power, and the textbook exactly the same. The centrifugal pump efficiency increases with the flow rate increases, did not appear to increase and then reduce the situation, may be due to the smaller flow rate. Centrifugal pumps must be operated in areas with low flow rates to obtain larger indenters. Centrifugal pumps with large flow rates need to be equipped with high-power motors. Shut-off valves should be closed before starting the centrifugal pump Wait. In addition, it was found that the readings of the pressure gauge and the vacuum gauge became smaller as the flow rate increased, explaining this phenomenon. The program has the advantages of simple structure and convenient maintenance, and can solve the complicated calculation of chemical engineering by simply modifying the data that can be used for experimenting with other chemical principles and giving full play to the specialty of C language.