Numerical Analysis of Distance Effect between Inducer and Centrifugal Impeller in Independent Rotational Turbopump in Co-rotating and Counter-rotating Mode

Ehsan Dehnavi (1) , Farid Bakir (1) , Amélie Danlos (1) , Mohamed Kebdani (1)

1 LIFSE - Laboratoire d'Ingénierie des Fluides et des Systèmes Énergétiques

This study focuses on enhancing the performance of turbomachines through the design of multi rotor configurations. Specifically, the effect of the distance between an axial inducer and a centrifugal impeller, which rotates independently in both co-rotation and counter-rotation modes, is investigated in a turbopump. The study parameters include the speed ratio and the distance between the inducer and impeller. Numerical results for the centrifugal impeller are validated through experimental testing, and two inducers with the same geometrical characteristics but with inverse tip angles are designed. Results show that changing the distance between the inducer and impeller, as well as the speed ratio, can have a significant impact on the turbomachine's performance.

Mots clés: Turbopump; Counter-rotative pump; Co-rotative pump; Inducer; Centrifugal impeller; Cavitation

Domaines: Sciences de l'ingénieur [physics]; Dynamique des Fluides [physics.flu-dyn]; Mécanique des fluides [physics.class-ph]

Ehsan Dehnavi, Farid Bakir, Amélie Danlos, Mohamed Kebdani. Numerical Analysis of Distance Effect between Inducer and Centrifugal Impeller in Independent Rotational Turbopump in Co-rotating and Counter-rotating Mode. ETC15, 15th European Turbomachinery conference: fluid dynamics and thermodynamics, Apr 2023, Budapest, Hungary. ⟨hal-04184150⟩