摘要
封闭进风腔式多翼离心风机运行时易出现紊流噪音,主观听感杂乱,经过CFD仿真分析,发现该类风机实际进风方向与理论进风方向不平行,风机内部尤其是叶轮区域的流动状态不均匀。根据该类风机流动特性在叶轮轮毂表面有针对性的设计预旋导叶,经过实验验证,该种方案可以明显改善主观听感。相同转速下风量提高约5%,相同风量下噪音声压级降低约0.4~0.5 dB,并提高了流态均匀性。
Flow simulation analysis was conducted to solve the turbulent noise of a closed inlet chamber multi-blade centrifugal fan when running,it has been found that the uneven flow state inside the fan especially impeller area is the main cause of subjective hearing noisy.Prerotating guide vane was targeted designed according to the flow characteristics of this kind of fan,the subjective sense of hearing has been confirmed to be significantly improved by experimental verification.Compared to the original plan,the air volume under same rotating speed was improved by 5%,the sound pressure level under same air volume was reduced by 0.4~0.5 decibel,and the flow uniformity was highly improved.
作者
王炳祺
吕园园
WANG Bingqi;LV Yuanyuan(Hisense Home Appliance Group Co.,Ltd.,Qingdao 266100;Hisense(Shandong)Air Conditioning Co.,Ltd.,Qingdao 266100)
出处
《家电科技》
2020年第S01期70-72,共3页
Journal of Appliance Science & Technology
关键词
多翼离心风机
封闭进风腔
预旋导叶
主观评价
Multi-blade centrifugal fan
Closed inlet chamber
Pre-rotating guide vane
Subjective sense of hearing