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| 扩散器结构参数对超高速微型轴流风机气动性能的影响 |
| Influence of diffuser structure parameters on aerodynamic performance of ultra-high speed micro axial fan |
| 投稿时间：2024-04-29 修订日期：2024-06-13 |
| DOI： |
| 中文关键词: 扩散器 超高速微型轴流风机 全压效率 Kriging模型 |
| 英文关键词: Diffuser Ultra-high speed micro axial fan Total pressure efficiency Kriging model |
| 基金项目:湖南省自然科学基金项目 （项目编号：2024JJ8017） |
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| 中文摘要: |
| 针对超高速微型轴流风机压力损失大、效率偏低的问题，采用在风机出风口处加装扩散器的方式进行改进，并利用数值模拟和代理模型相结合的方法，探究扩散器结构参数对风机内部流场的影响，获取扩散器的最优结构参数。首先，建立了超高速微型轴流风机及扩散器的几何模型；然后，利用Fluent软件，以风机的全压效率为评价指标，选择扩散器的长度、扩压角、内芯长度等结构参数开展了单因素实验，并探究这些参数对风机动压、湍动能的影响；最后，采用最优拉丁超立方抽样对扩散器结构参数进行抽样，并结合Kriging代理模型，获取了扩散器的最优结构参数。研究结果表明：在额定转速下，当扩散器的长度为34.2mm，扩散角为7.4°，内芯长度为21.6mm时，优化后的风机全压效率较原型风机提高了约10%。 |
| 英文摘要: |
| In view of the problems of high pressure loss and low efficiency of ultra-high speed micro axial fan, a diffuser is installed at the outlet of the fan to improve the problem. The influence of diffuser structural parameters on the internal flow field of the fan is explored by combining numerical simulation and proxy model, and the optimal combination of structural parameters of the diffuser is obtained. Firstly, the geometric model of ultra-high speed micro axial fan and diffuser is established and the grid is divided. Then, using Fluent software, taking the total pressure efficiency of the fan as the evaluation index, single factor experiments are carried out by selecting the length of diffuser, diffuser Angle, inner core length and other structural factors. Finally, the optimal Latin hypercube sampling is used to sample the diffuser structure parameters, and the optimal structure parameter combination is obtained based on the Kriging proxy model. The results show that when the length of the diffuser is 34.2mm, the diffusion Angle is 7.4° and the inner core length is 21.6mm, the total pressure efficiency of the optimized fan is about 10% higher than that of the prototype fan at the rated speed. |
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