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- W3034196136 abstract "Reynolds-averaged Navier-Stokes (RANS) simulations of a Mach 1.5 jet at a total temperature ratio (TTR) of 2 are compared with experimental data to assess how well the simulations reproduce salient features of the mean flow and turbulence structure with the introduction of a thermal non-uniformity. The RANS simulations are performed using ANSYS Fluent and are modeled after a thermally non-uniform configuration that has demonstrated the ability to reduce radiated noise compared to a thermally uniform baseline. Computational results show that the model predicts expected local changes in the mean axial velocity due to the thermal non-uniformity well. Mean turbulence intensity results, while showing poor agreement with experiments in the shear layer, reveal useful information regarding the turbulence generated by the non-uniformity near the centerline where it is initially introduced. Statistical analysis of the experimental data shows that the meandering motion of the jet column partially explains some of the discrepancies between computational and experimental results. A RANS simulation of a thermally non-uniform Mach 1.5 jet at a TTR of 7 is also presented to support claims previously made by this group that implementing a thermal non-uniformity in a full-scale afterburning jet engine could yield greater acoustic benefits than have been observed in an experimental setting. It is shown that, when studying thermally non-uniform jets with inherently complex turbulent mixing characteristics, useful information can still be extracted from RANS simulations which can be used to inform future computational or experimental efforts." @default.
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- W3034196136 date "2020-06-08" @default.
- W3034196136 modified "2023-10-11" @default.
- W3034196136 title "RANS Simulations of Thermally Non-Uniform Supersonic Jets" @default.
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- W3034196136 doi "https://doi.org/10.2514/6.2020-2522" @default.
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