POD study of aerated cavitation in a venturi nozzle

P. Tomov (1, 2) , Amélie Danlos (3) , S. Khelladi (1) , Florent Ravelet (1) , C. Sarraf (1) , F. Bakir (1)

1 DynFluid - Laboratoire de Dynamique des Fluides
2 SNECMA Villaroche [Moissy-Cramayel]
3 LGP2ES - Laboratoire Génie des Procédés pour l'Environnement, l'Energie et la Santé

The fact of injecting bubbles into a cavitating flow influences typical cavitating behavior. Cavitation and aerated cavitation experiments has been carried out on a symmetrical venturi nozzle with convergent/divergent angles of 18 ◦ and 8 ◦ , respectively. A snapshot Proper Orthogonal Decomposition (POD) technique is used to identify different modes in terms of discharge flow velocity, pressure and injected quantity of air. The energy spectrum per given mode is also presented. The first four modes are outlined in the present paper for an aerated and non-aerated cavitating flows.

Domaines: Dynamique des Fluides [physics.flu-dyn]

P. Tomov, Amélie Danlos, S. Khelladi, Florent Ravelet, C. Sarraf, et al.. POD study of aerated cavitation in a venturi nozzle. 9th international symposium on cavitation, Dec 2015, Lausanne, Switzerland. ⟨hal-01204614⟩