摘要
介绍了在水和蒸汽性质计算中,利用Brent算法,通过IAPWS-IF97计算模型的基本公式的快速迭代计算其逆函数,给出了求解过程的计算逻辑图和算法实现的关键,以及软件函数编写和调用的要点,并分析了计算结果的精度。分析表明,在水和蒸汽性质计算中,用Brent算法来求基本函数的逆函数,能稳健、快速地达到预设的高精度要求。
The application of Brent algorithm in the water and steam properties calculation, i. e. , using fast iterative base on IAPW-IF97 basic formula to calculate the inverse function, is introduced. It gives the calculation logic diagram of the solution process, the algorithm emphasis and the key points of program and function call, analyzes the accuracy of the results obtained. Analysis indicates that the inverse function of the basic function using Brent algorithm can be stable and quickly reach the preset precision requirements in the water and steam properties calculation.
出处
《热力透平》
2014年第2期143-145,158,共4页
Thermal Turbine
基金
科技部科研院所技术开发研究专项资金(2013EG119143)
关键词
水和蒸汽
性质计算
Brent算法
water and steam
properties caleulation
Brent algorithm
