Effects of Bionic Volute Tongue on Aerodynamic Performance and Noise Characteristics of Centrifugal Fan Used in the Air-conditioner
作者机构：Department of Fluid Machinery and EngineeringSchool of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049China The 705 Research InstituteChina State Shipbuilding Corporation LimitedXi'an 710077China
出 版 物：《Journal of Bionic Engineering》 (仿生工程学报（英文版）)
年 卷 期：2020年第17卷第4期
页 面：780-792页
核心收录：
学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理]
主 题：bionic design volute tongue centrifugal fan noise reduction numerical simulation
摘 要：The aerodynamic noise generated by the centrifugal fan used in the air conditioner is related to the comfort of human living and working,which can be controlled by using the bionic design and optimization of key components of centrifugal *** by the non-smooth leading edge of long-eared owl wing,eight kinds of volute tongues are proposed to reduce the aerodynamic noise of a centrifugal *** flow and sound characteristics are numerically investigated by incorporating computational fluid dynamics and computational *** optimal result exhibits a noise reduction of up to 1.5 dB with a slight increase in mass flow *** acoustic characteristics,with respect to the sound pressure level,power spectral density,and sound directivity are *** time-domain,frequency-domain,and root mean square values of pressure fluctuation are monitored and analyzed to assess the unsteady flow interaction between the volute tongue and *** intensity and scale of vortices in the centrifugal fan are suppressed in the upstream and downstream of the bionic volute tongue,and the turbulence effect on the surface of the volute tongue becomes even and weak.
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