A new compact active turbulence generator for premixed combustion: Non-reacting flow characteristics
نویسندگان
چکیده
A new compact active turbulence generator is developed, tested, and characterized, which extends the capabilities of such generators used in turbulent premixed combustion research. The composed two blades that resemble shape bow-ties. Hot-wire anemometry high-speed imaging are performed to characterize non-reacting flow produced by dynamics, respectively. Two mean bulk velocities 5.0 7.0 m/s examined. For comparison purposes, addition developed generator, tests also for a free jet as well one perforated plates. results show centerline root square velocity fluctuations can become about 1.8~m/s, several folds larger than literature reacting flows generated grids. newly device, power-law decay one-dimensional kinetic energy -1.0 -1.3 m/s, normalized dissipation rate smallest while largest. spectral analysis data does not dominant frequencies equal rotation frequencies; and, dimensional spectra follow -5/3 1/3 relations. It shown that, small eddies device dissipate faster those corresponding rest tested generators.
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2022
ISSN: ['1527-2435', '1089-7666', '1070-6631']
DOI: https://doi.org/10.1063/5.0108020