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- W2314383765 abstract "This study is a continuation of efforts to understand unsteady phenomena that contribute to the production and propagation of jet noise. These phenomena include the production and interaction of large-scale coherent structures and how they contribute to small-scale turbulence that produces the jet mixing noise. These phenomena also include the interaction of shock waves with the jet shear layer, which generates shock-associated noise and screech in under-expanded supersonic jets. The fluctuation in flow quantities, such as pressure and velocity, associated with these phenomena are the unsteady mechanisms responsible for the production and propagation of jet noise. Therefore, accurate simulation of these flow phenomena is essential for noise prediction. Time accurate numerical simulation of a supersonic under-expanded jet is performed by solving the two-dimensional Navier-Stokes equations. Time averaged results are used to investigate various characteristics of the jet flow such as jet spreading rate, shock-cell structure, and turbulent intensity levels. Unsteady behavior of the jet and the noise production mechanisms are illustrated using visualization of the numerical results. The turbulent behavior of the flow is studied through two-point spacetime correlation of fluctuating quantities. The results show the capability of the present formulation to resolve the complex features of supersonic jets." @default.
- W2314383765 created "2016-06-24" @default.
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- W2314383765 date "2001-05-28" @default.
- W2314383765 modified "2023-09-26" @default.
- W2314383765 title "Simulations of unsteady behavior in under-expanded supersonic rectangular jets" @default.
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- W2314383765 doi "https://doi.org/10.2514/6.2001-2119" @default.
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