Turbofan engines are one of the most popular propulsion systems used in commercial
aircraft due to their high thrust and good fuel efficiency. To reduce noise generated from …

This paper presents a combined experimental and numerical investigation on a novel liner
concept for enhanced low-frequency and broadband acoustic attenuation. In particular, two …

In this study, the effect of utilizing a perforated surface as an innovative flow control method
to reduce fan noise is numerically investigated. The case study consists of a shrouded axial …

Simulation-based optimization of acoustic liner design in a turbofan engine nacelle for noise
reduction purposes can dramatically reduce the cost and time needed for experimental …

Chevrons are widely used passive noise reduction devices that have emerged as an
significant breakthrough for aicraft industry in enabling substantial noise reduction without …

Aircraft noise and emissions have been of concern since the beginning of commercial
aviation. The continuing growth in air traffic and increasing public awareness have made …

The aero-engine noise sources and the classification of aero-engine noise reduction
technology were described in this paper. In addition, the application status of composite …

Aspects of the disclosure are directed to a system associated with an engine of an aircraft
comprising: a duct, an inlet coupled to the duct, and a fence coupled to the inlet or located …

This paper presents the application of a concept evaluation of two broadband acoustic liners
for future aviation. Requirements, design and functions of these liner concepts are …

Nowadays, noise has turned into one of the most important among the environmental factors
on which industry sets down a big part of its efforts and concerns. The recognition of noise …