Simulation and experiment study of the self-excited oscillating mixer with abrasive jet used for the descaling of rusty steel
| Autor: | Songlin Nie, Hui Ji, Xiurong Cao, Fanglong Yin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Jet (fluid) Materials science Computer simulation Oscillation Mechanical Engineering Self excited oscillation Abrasive 02 engineering and technology Abrasive water jet Mechanics 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Strip steel 020901 industrial engineering & automation Excited state 0210 nano-technology |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering. 233:1109-1127 |
| ISSN: | 2041-3009 0954-4089 |
| DOI: | 10.1177/0954408919841189 |
| Popis: | A novel self-excited oscillating mixer is developed for the descaling of strip steel, which synthesizes the post-mixed abrasive water jet and self-excited oscillation. The realizable k-ɛ model is selected to investigate the effects of different abrasive entrance, inlet pressure, mixing chamber diameter, and length on the jet characteristics. Meanwhile, the effects of different inlet pressure and target distance on the outlet velocities for two kinds of mixers (including the developed mixer and conventional post-mixing mixer) with or without abrasive jet are investigated through simulation. Experiment as well as simulation results exhibited: (1) The oblique abrasive entrance can accelerate the mixture of water and abrasive due to its larger turbulent kinetic energy, and its outlet velocity is larger than that of radial and axial abrasive entrances. (2) For the developed mixer, the outlet velocity is preferable when the mixing chamber diameter is about 40–50 mm and the mixing chamber length is 20 mm. (3) The descaling efficiency of the developed mixer is superior to that of conventional post-mixing mixer. The research will lay foundation to optimize the structure of self-excited oscillating mixer for the descaling of rusty steel. |
| Databáze: | OpenAIRE |
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