@Article{sv.2020.08636,
AUTHOR = {Ali Safari Variani, Ali Dastamoz, Sajad Zare, Ahmad Nikpey, Saeid Ahmadi},
TITLE = {The Acoustic Performance of 3D Printed Multiple Jet Nozzles with Different Configurations},
JOURNAL = {Sound \& Vibration},
VOLUME = {54},
YEAR = {2020},
NUMBER = {1},
PAGES = {43--55},
URL = {http://www.techscience.com/sv/v54n1/38412},
ISSN = {2693-1443},
ABSTRACT = {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<i>(A)</i> and 11.5–15 dB<i>(A)</i>,
respectively. On average, slotted nozzle noise reduction was nearly 5–6 dB<i>(A)</i>
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<i>(A)</i>, 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.},
DOI = {10.32604/sv.2020.08636}
}