Assessment of Single- and Two-Zone Modeling of Centrifugal Compressors, Studies in Component Performance: Part 3

Abstract

Single- and two-zone modeling, as used to describe the performance of centrifugal compressors, is evaluated against basic laboratory data. The historical industrial usage of single-zone modeling is reviewed and documented while indicating inherent errors as well as areas of applicability. Enhanced accuracy of two-zone modeling (also called jet-wake modeling in limited instances) is demonstrated and advantages for advanced design optimization studies are documented. An original and rigorous derivation of the two-zone (jet-wake) modeling equations is given which resolves discrepancies in earlier derivations. This paper is part of a seven-paper series presenting the foundation, history and application of two-zone modeling.