Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : July 18, 2024
A perforated metal plate has many small holes. High-speed air flow through the perforated metal plate generates noise caused by aerodynamic vibration or plate vibration. This study deals with the suppression of the noise caused by the high-speed air flow through the perforated metal plate. The expansion type perforated metal plate with plover hole position generated a large level noise with a prominent peak. In the flow visualization experiment, the jet flow in-phase interference is important for the generation of a prominent noise peak is found. Each hole distance is required to change the aperiodicity to suppress the jet flow interference. Aperiodic tiling is used to determine the hole position of the perforated metal plate to make the aperiodic perforated metal plate. However, the aperiodic perforated metal plate could not suppress the prominent noise peak. It is found that the jet flow interference is not important for the prominent noise peak.
