基于IAPWS-IF97的3区T(p,h)、v(p,h)反推牛顿迭代计算

Newtonian Iteration on Backward Equations T(p,h)、v(p,h) for Region 3 of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam

利用牛顿迭代法求解IAPW S-IF97的3区T(p,h)、v(p,h),并同时与IAPW S-IF97的3区T(p,h)、v(p,h)反推线性拟合公式从计算精度和计算效率作了比较说明。通过分析说明,其计算精度高于IAPW S-IF97的3区T(p,h)、v(p,h)反推公式,而计算效率稍逊于反推公式。

Newtonian iteration on backward equations T （p, h ） ,v （p, h） for region 3 of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam is investigated in this paper. Compared with linear equations method, newtonian iteration is much better in computational accuracy but a little worse in computational efficiency.