A comparison of low and high-order methods for the simulation of supersonic jet flows
The present work compares results for different numerical methods in search of alternatives to improve the quality of large-eddy simulations for the problem of a supersonic turbulent jet flows. Previous work has analyzed supersonic jet flows using a second-order, finite difference solver based on structured meshes, and the results indicated a shorter potential core of the jet and different levels of velocity fluctuations. In the present work, the results of previous simulations are compared to new results using a high-order, discontinuous Galerkin solver for unstructured meshes. All simulations are performed, keeping the total number of degrees of freedom constant. The results of the current simulations present very similar mean velocity distributions and slightly smaller velocity fluctuations, and they seem to correlate better with the experimental data. The present results indicate that additional studies should focus on the jet inlet boundary conditions in order to improve the physical representation of the early stages of the jet development.
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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 ...
Conférence invitéeVIANA DAURICIO, Eron Tiago; JUNQUEIRA JUNIOR, Carlos; FEROLLA DE ABREU, Diego; AZEVEDO, João Luiz F. (ABCM, 2022-11)Wall-Modeled Large Eddy Simulation (WMLES) is a well-stablished technique for obtaining high-fidelity solutions of turbulent, high Reynolds number flows, with reasonably acceptable computational costs. However, for external ...
Large-eddy simulations of turbulent compressible supersonic jet flows using discontinuous Galerkin methods Communication avec acteF. ABREU, Diego; JUNQUEIRA JUNIOR, Carlos; DAURICIO, Eron; F. AZEVEDO, João Luiz (Scipedia S.L., 2022-06)In this work, a discontinuous Galerkin scheme is employed to perform the simulations of supersonic jet flows. A total of four simulations are performed with different meshes and order of accuracy. The number of degrees of ...
Article dans une revue avec comité de lectureJUNQUEIRA-JUNIOR, Carlos; AZEVEDO, João Luiz F.; PANETTA, Jairo; WOLF, William R.; YAMOUNI, Sami (Elsevier, 2020)New regulations are imposing noise emissions limitations for the aviation industry which are pushing researchers and engineers to invest efforts in studying the aeroacoustics phenomena. Following this trend, an in-house ...
Article dans une revue avec comité de lectureJUNQUEIRA-JUNIOR, Carlos; AZEVEDO, João Luiz F.; PANETTA, Jairo; WOLF, William R.; YAMOUNI, Sami (Springer Verlag, 2019)Acoustics loads are rocket design constraints which push researches and engineers to invest efforts in the aeroacoustics phenomena which is present on launch vehicles. Therefore, an in-house computational fluid dynamics ...