Numerical investigation of sheet cavitation over a 3-D venturi configuration
Communication avec acte
Sheet cavitation appears in many hydraulic applications and can lead to technical issues. Numerical simulation is a pertinent way to study the phenomenon. A numerical tool based on 1-fluid compressible RANS equations with a cavitation model is used to compute a flow within a 3-D venturi geometry with a 4° divergent angle. In the present work, a detailed study of this cavitating flow, which presents a quasi-stable vapour pocket, is carried out using tools such as Power Spectral Densities or Spectral Proper Orthogonal Decompositions. An oblique oscillation of the cavity is then identified and discussed.
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Article dans une revue avec comité de lectureGOUIN, Camille; JUNQUEIRA-JUNIOR, Carlos; GONCALVES DA SILVA, Eric; ROBINET, Jean-Christophe (AIP Publishing, 2021)Sheet cavitation appears in many hydraulic applications and can lead to technical issues. Some fundamental outcomes, such as, the complex topology of 3-dimensional cavitation pockets and their associated dynamics need to ...
Three-dimensional instability of a ow past a sphere: Mach evolution of the regular and Hopf bifurcations Article dans une revue avec comité de lectureSANSICA, Andrea; ROBINET, Jean-Christophe; ALIZARD, Frédéric; GONCALVES, Eric (Cambridge University Press (CUP), 2018)A fully three-dimensional linear stability analysis is carried out to investigate the unstable bifurcations of a compressible viscous fluid past a sphere. A time-stepper technique is used to compute both equilibrium states ...
Article dans une revue avec comité de lectureBUGEAT, B.; CHASSAING, Jean-Camille; ROBINET, Jean-Christophe; SAGAUT, P. (Elsevier, 2019)3D optimal forcing and response of a 2D supersonic boundary layer are obtained by computing the largest singular value and the associated singular vectors of the global resolvent matrix. This approach allows to take into ...
Article dans une revue avec comité de lectureBUGEAT, Benjamin; ROBINET, Jean-Christophe; CHASSAING, Jean-Camille; SAGAUT, Pierre (Cambridge University Press (CUP), 2022-04)Resolvent analysis is used to study the low-frequency behaviour of the laminar oblique shock wave/boundary layer interaction (SWBLI). It is shown that the computed optimal gain, which can be seen as a transfer function of ...
Conférence invitéeJUNQUEIRA-JUNIOR, Carlos; F. ABREU, Diego; T. V. DAURICIO, Eron; F. AZEVEDO, João Luiz (AIAA, 2022-06)The present study is concerned with large-eddy simulations (LES) of supersonic jet flows. The work addresses, in particular, the simulation of a perfectly expanded free jet flow with an exit Mach number of 1.4 and an exit ...