風量調整ダンパから発生する流体音に関する実験および数値解析

抄録

Experiments and numerical analyzes were performed on a flow rate adjustment damper used in a duct air-conditioning system, which generates fluid noise when blowing air. In the experiment, an anechoic chamber capable of supplying low-noise air was used, and an airflow adjustment damper was installed in the duct of the test apparatus to measure the sound pressure level. Next, the numerical analysis was performed using the decoupled method of the fluid analysis and the acoustic analysis, and the vortex structure and acoustic characteristics of the flow field generated by installing the airflow adjustment damper were discussed. Furthermore, we compared the acoustic characteristics with experiments and numerical analysis, and evaluated the practicality of the noise prediction accuracy of the numerical analysis.