An aircraft’s final certification depends on aero engine and nacelle manufacturers and aircraft OEMs meeting mandatory acoustic standards, which apply to measurements of an aircraft’s take-off, sideline and approach noise levels.
Turbofan engine fan noise is one of greatest sources of sound during take-off and approach, and aircraft manufacturers use engine nacelle acoustic liners to reduce it. These nacelle liners must be light, fit into a very limited space within a nacelle’s complex geometry, and be durable despite difficult environmental conditions.
Testing nacelle liners on finished products is time-consuming and costly, which is why manufacturers use simulation tools. But to be effective, an acoustic simulation tool has to accurately account for variables including convected acoustics in both near field and far field; represent engine source excitation; and model the acoustic linear effects, all within complex geometries and while meeting industry standards.
Hexagon’s acoustic simulation software has been specifically designed to optimise the acoustic performance of nacelles and won the Peter Lord Award from the UK’s Institute of Acoustics.
Explore Hexagon solutions for aero engine nacelle acoustic performance simulation