| 任洪勇， 李嘉渊， 余焕伟， 王昌训， 柴敏， 谢林君.基于CFD的多翼离心风机叶轮结构设计[J].轻工机械,2022,40(1):100-104 |
| 基于CFD的多翼离心风机叶轮结构设计 |
| Structure Design of Multi Blade Centrifugal Fan Impeller Based on CFD |
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| DOI：10.3969/j.issn.1005 2895.2022.01.017 |
| 中文关键词: 多翼离心风机 CFD 多目标优化法 多工况优化法 叶片型线 预估导流板型 |
| 英文关键词:multi blade centrifugal fan CFD (Computational Fluid Dynamics） multi objective method multi condition optimization method blade profile predicted guide plate type |
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| 摘要点击次数: 827 |
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| 中文摘要: |
| 针对叶轮出现回流、部分叶道存在边界层分离而导致多翼离心风机气动性能下降的问题，课题组通过CFD 数值模拟方法和采用多目标多工况优化方法对风机叶轮进行改型设计，并将该研究结果应用于600 mm×600 mm暖风机的改进方案中。研究结果表明：风机叶轮叶片进口角由61°变化到30°，叶片型线采用样条曲线以及叶片数减小至40片，并采用预估导流板型，可以有效改进出风罩内气体旋涡、回流和叶道内分离的问题；优化后风机流量增大至107.28 m/h，较原风机模型增大了22%，同时风机效率也得到相应的提升。通过减小空调暖风机叶片数、增大叶轮外径、增加叶轮高度以及增大进口直径的方法，使得风机出口速度提升了3倍多，同时出口处回流基本消失。叶轮结构改型设计后风机的性能有了较大的提升。 |
| 英文摘要: |
| Aiming at the problem that the reduced aerodynamic performance of multi blade centrifugal fan due to the backflow of impeller and boundary layer separation of some blade passages, the multi objective and multi condition optimization design method was used to modify the fan impeller through CFD numerical simulation, and the research results were applied to the improvement scheme of 600 mm×600 mm air heater. The results show that the inlet angle of the fan impeller blade changes from 61° to 30°, the blade profile adopts spline curve and the number of blades is reduced to 40. The predicted guide plate type is adopted to effectively improve the problems of the vortices in the outlet hood, backflow and separation in the blade passage. The fan flow rate increases to 107.28 m/h, which is 22% larger than the original fan model after optimization. At the same time, the efficiency of the fan is improved accordingly. By reducing the number of blades, increasing the outer diameter of the impeller, increasing the height of the impeller and increasing the inlet diameter of the fan, the outlet speed of the fan is increased by more than three times, and the backflow at the outlet basically disappears. The performance of the fan has been greatly improved after the modification of impeller structure design. |
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