Aeroacoustic Characteristics of Main Landing Gear of High-Lift Common Research Model

This paper summarizes the development of an 8% scale main landing gear model based on NASA’s design for the high-lift common research model (CRM-HL). It also presents the main landing gear model’s initial far-field noise measurement results independently used in a JAXA low-noise wind tunnel. Each key component of the stand-alone MLG model was acoustically evaluated to assess component-level noise characteristics. Computational results are also presented to compare with the experiment and understand the flow fields. These are part of JAXA’s ongoing efforts to improve the understanding of landing gear noise, assess the impact of the main landing gear installed on the semi-span high-lift common research model, validate computational fluid dynamics results, and support initiatives aimed at reducing airframe noise in medium-sized passenger airplanes.