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| Structure Design and Simulation Optimization of a New Air-supplied Low Pressure Jet Aerator |
| Received:November 26, 2021 |
| DOI：10.11980/j.issn.0254-508X.2022.02.013 |
| Key Words:air-supplied low pressure jet aerator turbulent kinetic energy water phase volume fraction Fluent software |
| Fund Project:陕西省重点研发计划项目（No.2017ZDXM-SF-096）；陕西省自然科学基础研究计划项目（No2017JQ5097）。 |
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| Abstract:In order to improve the mixing effect and oxygenation efficiency of air-supplied jet aerator， the structure of which was redesigned according to various oxygen mass transfer mechanisms， and the optimizized scheme such as small hole outlet on inlet pipe was proposed. The three-dimensional model was established using numerical simulation and analysis software （Solidworks）， and Fluent software was used to simulate and analyze the structural rationality and the influence of various structural parameters on the turbulent mixing effect. This study compared the streamline diagrams of the first-generation and the third-generation new aerators. The simulation results of water phase volume fraction showed that the design structure of the new aerator was reasonable and the mixing effect significantly improved. The optimized parameters of the third-generation air-supplied low pressure jet aerator were as follows： diameter of primary pipe， primary nozzle， and inlet pipe of 86， 36， and 20 mm， respectively， inlet pipe length of 82 mm， mixing chamber diameter and length of 140 and 400 mm， respectively the secondary nozzle diameter of 55 mm and opening diameter 3 mm. The opening distribution was 7 columns evenly distributed with 8 holes in each. |
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