Experimental investigations on the performance and noise characteristics of a forward-curved fan with the stepped tongue
Experimental investigations on the performance and noise characteristics of a forward-curved fan with the stepped tongue
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阶梯舌前弯风扇性能及噪声特性实验研究
DOI：
10.1177/0020294019877482
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发表时间：
2019
影响因子：
2
通讯作者：
Yikun Wei
中科院分区：
文献类型：
--
作者：
Hui Yang;Peiquan Yu;Jun Xu;Cunlie Ying;Wenbing Cao;Yingdong Wang;Zuchao Zhu;Yikun Wei
本文通过实验研究了阶梯蜗壳舌对前弯风机气动性能和气动声学性能的影响。根据不同阶跃舌的实测声压，分析并控制了噪声特性；同时对风扇性能进行检测和优化。阶梯式舌舌的设计参数提供了显著的物理洞察，以增加静压，以及静压效率和减少风扇噪声的产生。试验结果对比表明，与基线模型相比，HLHL模型的改进静压和效率分别提高了15.67 Pa和3.57%。在740 m3/h时，观察到不同阶梯舌形排列与噪声产生有很大的相关性。HLHL模型的音调噪声水平是一种较好的优化方案，它使前弯风机的噪声产生降低了1.2 dB。特别是通过实验测量，发现蜗壳舌部的一些阶梯式舌部同时达到了减少噪声产生和提高风机性能的目的。
This work presents an experimental study to investigate the influence of step volute tongue on aerodynamic performance and aeroacoustic behavior of a forward-curved fan. The noise characteristics are analyzed and controlled based on measured acoustic pressures for various stepped tongues; meanwhile, fan performance is detected and optimized. The design parameters of the stepped tongues are presented to provide significant physical insight into increasing the static pressure as well as the efficiency of static pressure and reducing the fan noise generation. The comparison of the test results indicates that the improved static pressure and its efficiency of the HLHL model have increased by 15.67 Pa and 3.57%, respectively, by comparing with those of the baseline model. At 740 m3/h, a great correlation between different arrays of stepped tongue and the noise generation was observed. The tonal noise level of the HLHL model is a better optimization scheme because it decreases as much as 1.2 dB for the noise generation of forward-curved fan. In particular, it is found that some stepped tongues of the volute tongue achieved the goal of reducing noise generation and improving the performance of fan by experimental measurement at the same time.