MAE Deparatment - PG Seminar -   Airframe Noise Reduction by Local Application of Porous Material

10:00am - 11:00am
RM 1103, HKUST (1/F, Lift # 19)

Noise produced by Aircraft can be a significant nuisance for the community around airports. Airport expansion plans are increasingly hampered by stringent noise regulations. Besides the noise produced by aircraft engines, airframe noise is important in certain flight phases (e.g., landing phase). Airframe noise can be defined as sound generated by the interaction between a turbulent flow and the aircraft’s geometry, e.g. landing gear noise, flap side-edge noise, or noise generated at a wing’s trailing edge. One of the challenges is a solution of the potential conflict between the growth of air transportation systems and the required noise reduction. One approach for such noise reduction can be to locally use porous materials on the trailing edge of a lift-generating wing. In this presentation, the used numerical prediction method is concisely presented followed by the local application of porous material with the aim to reduce of the sound produced at the wing’s trailing-edge. Local application here means substituting the latter part near the wing’s trailing-edge with a porous inset. Several numerical examples will illustrate the performance and limitations of the suggested noise reduction method. If time permits, also other passive means of noise reduction will be discussed, e.g., finlets.

讲者/ 表演者:
Prof. Dr. Ir. Rinie A.D. AKKERMANS
Professor for Aerodynamics and Flight Mechanics, Department Automotive & Aeronautical Engineering, Hamburg University of Applied Sciences

Professor R.A.D. Akkermans received his B.Sc. and M.Sc. degrees from the Technical University of Delft (Netherlands) in Aerospace Engineering in 2002 and 2004 respectively, followed by a PhD from the Technical University in Eindhoven (Netherlands) on the topic of 2D Turbulence in 2010. From 2010 he worked at the German Aerospace Center (DLR) related to installation effects on Open Rotor noise. After 2014, he joined the Technical University on Braunschweig (Germany) as faculty, leading a research group on computational aeroacoustics. Since 2020, he is Professor for Aerodynamics and Flight Mechanics at the Hamburg University of Applied Sciences (Germany). Professor Akkermans has also served as a visiting Professor at the Basque Center of Applied Mathematics (Spain) in 2014 and Beihang University (China) in 2017 and 2023. His research interests are focused on aerodynamics/aeroacoustics, including sound mechanisms, noise reduction by passive methods, rotor noise, and automotive noise.

Department of Mechanical & Aerospace Engineering