Equation (4) in the original paper contains errors. The correct equation is given as follows:
(4)

The supplementary material of the paper [19] has been updated accordingly and now also contains ready-to-use MATLAB functions for Eqs. (3) and (4).

Reference

1.
Mounier
,
V.
,
Picard
,
C.
, and
Schiffmann
,
J.
,
2019
,
Data-Driven Pre-Design Tool for Centrifugal Compressor—Supplementary Data
, Version 3,
Mendeley Data
, London.