| 陈振国， 王海峰， 刘伯轩.喷嘴压力对非淹没空化流场影响的研究[J].轻工机械,2019,37(4):25-29 |
| 喷嘴压力对非淹没空化流场影响的研究 |
| Influence of Nozzle Pressure on Flow Field of Non Submerged Cavitation Jetting |
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| DOI：10.3969/j.issn.1005 2895.2019.04.005 |
| 中文关键词: 空化喷嘴 非淹没 空化水射流 三相流 FLUENT软件 |
| 英文关键词:cavitation nozzle non submerged cavitation water jet three phase flow FLUENT |
| 基金项目: |
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| 摘要点击次数: 762 |
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| 中文摘要: |
| 为了了解非淹没射流对大型工件的处理效果，课题组提出并设计了一种新型的非淹没人工射流，该方式可以适应各种场合工件的处理。在理论基础上，由淹没状态下的汽、液两相流变为非淹没状态下的气、汽、液三相流，采用外围低压水与内喷嘴高压水的结合，形成了人工淹没环境结构；通过该结构，使用FLUENT软件，实现了非淹没喷嘴空化效果的判断与预测；并通过模拟结果，分析了不同压力对空化流场的影响。结果表明：随着压力的升高，流场的轴向速度、轴向动压强以及汽相体积分数有着明显的提高。该非淹没喷嘴可产生较强的空化效果，且对入口压力较为敏感。 |
| 英文摘要: |
| To understand the effect of non submerged jet on large workpieces, a new type of non submerged artificial jet was proposed and designed, which could be well adapted to the processing of workpieces in various occasions. On the basis of theory, the three phase flow of gas, vapor and liquid in non submerged state was changed from the two phase flow of vapor and liquid in submerged state. The structure of artificial submerged environment was formed by the combination of peripheral low pressure water and internal nozzle high pressure water. Through this structure and using Fluent software, the judgment and prediction of cavitation effect of non submerged nozzle were realized. The influence of different pressure on cavitation flow field was analyzed by simulation results. The results show that with the increase of pressure, the axial velocity, axial dynamic pressure and vapor volume fraction of the flow field increase significantly. Therefore, the non submerged nozzle can produce strong cavitation effect and is sensitive to the inlet pressure. |
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