The Spline-Based Table Look-Up Method (SBIL)

摘要

The Spline-Based Table Look-llp method (SBTL) applies polynomial spline interpolation techniques to approximate the results of existing equations of state, with high accuracy and low computing time. The accuracy, computing time, and memory storage advantages are enabled with specialized coordinate transformations and simplified search algorithms as described below. The properties in the singlc-phase regions, such as T(p,h), are represented by two-dimensional spline functions in the common form z~(SPL) (x_1...x_2). whereas the phase boundaries, such as T_s(p), are represented by one-dimensional spline functions z (.v, ). Algorithms for calculating properties in the two-phase region that are consistent with those of the single-phase regions are also provided. The explanations given in this section are similar to those airead) published in 1611, but are extended for the sake of completeness.