防涡片集流器对多翼离心风机噪声性能的影响研究

Research on the Influence of Anti Vortex Vane Collector on the Noise Performance of Multi-Blade Centrifugal Fan

本研究基于计算流体力学的方法设计了一种带有防涡片结构的新型集流器来降低多翼离心风机系统的噪声,分别详细分析了有、无防涡片的风机流场细节,通过噪声实验验证了防涡片改善噪声的可行性。研究结果表明,带有防涡片结构的集流器改善了风机的内部流动结构,使得剪切层远离叶片梢部。叶轮的主气流向叶轮根部移动,降低了滤网造成的气体扰流,叶片梢部的流场结构也趋于合理。噪声实验表明防涡片相较于集流器的防护网有更好的降噪效果。当防涡片安装在远离蜗舌的位置时,风机的最大噪声可降低1dB。

Based on the method of computational fluid dynamics,this research designed a new type of collector with anti vortex vane structure to reduce the noise of multi-blade centrifugal fan system,and analyzed the flow field details of the fan with or without anti vortex vane in detail,the feasibility of improving noise with anti vortex vane has been verified through noise experiments.The research results indicate that the collector with anti vortex blade structure improves the internal flow structure of the fan,making the shear layer far away from the blade tip.The main airflow of the impeller moves towards the root of the impeller,reducing the air turbulence caused by the filter,and the flow field structure at the blade tip also tends to be reasonable.The noise experiment shows that the anti vortex vane has a better noise reduction effect compared to the protective mesh of the current collector.When the anti vortex vane is installed away from the volute tongue,the maximum noise of the fan can be reduced by 1dB.