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为了得出工质及能质在管道中传递的实际过程及传递过程中管道阻力特性的变化。在考虑管道内存在的摩擦、散热、弯头、节流等影响因素情况下,基于工程热力学及气体动力学理论,并引入速度系数,导出管道中以压力场和温度场为主导势场时的传递系数与速度系数之间的函数关系式,并以某电厂内主蒸汽管道平直段为例进行了计算,并与传统的传递系数计算方法进行比较,得到了一些新的结论,为工程中合理的确定管道管径、泵机组数以及管线的位置的最优组合方案提供了理论参考依据。
In order to draw the working fluid and the quality of the actual process of transmission in the pipeline and the transfer process of resistance characteristics of the pipeline changes. Considering the influencing factors such as friction, heat dissipation, elbow, throttling and other factors in the pipeline, based on engineering thermodynamics and gas dynamics theory, the velocity coefficient is introduced to derive the pressure field and the temperature field as the dominant potential field in the pipeline The relationship between the transfer coefficient and the speed coefficient is calculated. Taking the straight section of the main steam pipe in a power plant as an example, it is compared with the traditional method for calculating the transfer coefficient, and some new conclusions are obtained In the project, it is reasonable to determine the pipe diameter, the number of pump units and the location of the pipeline optimal combination of programs provide a theoretical reference.