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- W2126564250 abstract "*† ‡ The compressible jet plume from a planar overexpanded nozzle is investigated by solving the Reynolds-Averaged Navier-Stokes equations with several turbulence models. Computations are conducted for a series of exit-to-throat area ratios (Ae/At) from 1.0 to 1.8 and a range of nozzle pressure ratios (NPR) from 1.2 to 1.8. The results are compared with available experimental data in a nozzle of the same geometry. The asymmetric jet plume is well predicted by the simulation and is consistent with the experiments. Among the different turbulence models tested, the two-equation Shear Stress Model (SST) is found to agree closest to the experiments. The simulations are able to predict the velocity profiles, total pressure decay, and axial jet thickness distribution in the jet plume reasonably well. Jet mixing is governed by Ae/At a n d t o a l e s s e r e x t e n t b y N P R . I n c r e a s i n g Ae/At results in a significant increase of mixing rate. Computations of turbulent kinetic energy (TKE) show that, with increasing Ae/At, the peak TKE in the plume rises and moves towards the nozzle exit. Significant increase of TKE inside the nozzle results from the asymmetric flow separation. Nomenclature" @default.
- W2126564250 created "2016-06-24" @default.
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- W2126564250 date "2007-01-08" @default.
- W2126564250 modified "2023-10-18" @default.
- W2126564250 title "Numerical Study of Jet Plume Instability from an Overexpanded Nozzle" @default.
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- W2126564250 doi "https://doi.org/10.2514/6.2007-1319" @default.
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