Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : July 10, 2017 - July 12, 2017
The fundamental sound absorbing characteristics of the Micro-perforated panel(MPP) liner is given by some useful prediction formulas or by normal impedance tube measurements, however these approaches are not sufficient for its application to the aero-engine inlets because of the presence of both grazing flow and oblique incidence waves. To evaluate the performance of MPP liner in the presence of flow, flow duct facility is designed and built. This paper presents the evaluation of MPP liners in this facility and acoustic impedance derivation from these results.
