Geometric shapes effect of in-duct perforated orifices on aeroacoustics damping performances at low Helmholtz and Strouhal number

• Main Authors: Zhao, Dan, Ji, Chenzhen, Wang, Bing
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Article
• Language: English
• Published: 2019
• Subjects: Acoustic Transducers; Materials Forming; Engineering::Mechanical engineering
• Online Access: https://hdl.handle.net/10356/85244; http://hdl.handle.net/10220/49187
• Institution: Nanyang Technological University

In this work, experimental studies are conducted to measure the aeroacoustics damping performances of 11 in-duct perforated plates in a cold-flow pipe with a variable Mach number. These in-duct plates have the same porosities but different number N and geometric shaped orifices. Here six shapes are...