Corrigendum to "Active subspaces for the optimal meanline design of unconventional turbomachinery" [Appl. Therm. Eng. 127 (2017) 1108–1118]. (5th March 2019) - Bahamonde, Sebastian; Pini, Matteo; De Servi, Carlo; Schiffmann, Jürg; Colonna, Piero