The Acoustic Performance of 3D Printed Multiple Jet Nozzles with DifferentConfigurations  

作　　者：Ali Safari Variani Ali Dastamoz Sajad Zare Ahmad Nikpey Saeid Ahmadi 

机构地区：[1]Department of Occupational Health and Safety,School of Public Health,Qazvin University of Medical Sciences,Qazvin,Iran [2]Department of Occupational Health and Safety,School of Public Health,Kerman University of Medical Sciences,Kerman,Iran

出　　处：《Sound & Vibration》2020年第1期43-55,共13页声音与振动（英文）

摘　　要：This work investigated multiple jet nozzles with various geometrical shape,number of exits,and material on reducing noise radiated from jet flows.Nozzles are categorized in two groups with few and many exit numbers,each with various exit shapes,slot and circular,and geometry.Firstly,nozzles are designed and then fabricated by a 3D printer,Form Labs,Form2USA,with polymeric resin.Also,the nozzle with the most noise reduction made of stainless steel.Noise and air thrust were measured at three air pressure gauges,3,5,7 BAR and directions from nozzle apex,30°,90°,135°.Nozzles with slot exit shape made of both plastic and stainless steel revealed the most noise reduction among all nozzles with few exit numbers,nearly 11–14 dB(A)and 11.5–15 dB(A),respectively.On average,slotted nozzle noise reduction was nearly 5–6 dB(A)more than finned nozzle.However,nozzles with more exit numbers,finned and finned-central exit,illustrated much more noise reduction than nozzles with few exit numbers,by almost 16–18 dB(A),they represented similar sound.All tested nozzles and open pipe demonstrated equal air thrust at each pressure gauges.The nozzles with slotted exit shape,either plastic or stainless steel,can provide reasonable noise reduction in comparison to other configuration with few exit numbers.In contrast,nozzles with more exit numbers demonstrated the most noise reduction.

关 键 词：Jet noise multiple jet nozzle noise reduction 3D design exit shape nozzle geometry 

分 类 号：TK1[动力工程及工程热物理—热能工程]