Numerical performance evaluation of design modifications on a centrifugal pump impeller running in reverse mode

Development of cavitation detection methodology for hydraulic turbomachines using experimental and numerical tools

“…The geometry, the mesh, and the boundary conditions on the walls of the domain of impeller No. 4 are taken from the studies of Kassanos et al (2016a) and Chrysovergis (2017). Consequently, the mesh convergence study (steps v & vi) and the study of the blade position influence (step viii) are not provided in this Thesis.…”

“…The computational domain and the final mesh of impeller No. 4 are taken from the studies of Kassanos (2016a) and Chrysovergis (2017), where single flow conditions have been discussed in detail for this pump. As a consequence, only the computational domain, its simplifications and the final mesh are presented in this section.…”

“…A value of absolute roughness equal to 70 µm on the walls of the computational domain of closed impeller No. 4 (Kassanos, 2016a). In the case of semi-open impeller No.…”

“…The mesh of impeller No. 4 is taken from the studies of Kassanos (2016a) and Chrysovergis (2017), and only a brief description of the geometry and the mesh details is given here.…”

“…For the pump with impeller No. 4, the computational domain and the mesh are taken from Kassanos et al (2016a) and Chrysovergis (2017). In these studies, the same pump is simulated, in order to investigate its performance when it operates under direct (pump) and inverse (hydroturbine), non-caviating conditions.…”