Noise mitigation with permeable traling edge
A. (Alejandro) Rubio Carpio
Dr. F. (Francesco) Avallone
Assistant Professor
Dr. D. (Daniele) Ragni
Assistant Professor
The present research project aims at developing a new generation of trailing edge (TE) low noise design solutions for rotating blades. Most promising materials for noise mitigation are foams. Open foams are conventionally manufactured with isotropic holes and are mainly used as noise dampers. Modern 3D printing technologies allow manufacturing tailored micro-structures which can revolutionize the concept of noise abatement by acting upon orientation and size of the pores; the foam becomes a “flow porous” material, with pores elongated in a specific direction. In this respect both flow and scattering effects can be optimised for noise abatement. The spatial distribution of the foam porosity together with its alignment with the flow will allow combining different mechanisms of noise reduction. One of these is the modification of the flow pattern and of the consequent pressure field induced by the open structure of the foam material.
Carpio, Alejandro Rubio, et al. “Experimental characterization of the turbulent boundary layer over a porous trailing edge for noise abatement.” Journal of Sound and Vibration 443 (2019): 537-558. DOI: 10.1016/j.jsv.2018.12.010
Alejandro was born in Valencia, Spain, where he obtained his MSc degree in Aerospace Engineering at the Polytechnic University of Valencia. Post graduation, he interned at CMT-Motores Térmicos, where he worked on the modelling of heat transfer models for turbochargers. Then, he completed his Research Master with honours at the Von Karman Institute for Fluid Dynamics (Brussels, Belgium), where his research project dealt with shock-cell noise. He is currently pursuing his PhD at the Delft University of Technology. His research project aims at developing a new generation of low-noise permeable trailing edges for wind turbine applications.
Francesco Avallone studied Aerospace Engineering at the University of Naples Federico II where he obtained also the PhD. His research interest focus on application of computational aeroacoustics to investigate the noise generation mechanisms and noise reduction solutions for wind energy and aeronautical applications. He is currently working on acoustic liners, porous materials and urban wind turbines on projects sponsored by Clean Sky 2, NWO and AARC.
Daniele Ragni graduated in Thermo-Mechanical Engineering at the Polytechnic University of Marche (2007). Obtained the Ph.D. in 2012 (Faculty of Aerospace Engineering TU Delft) and joined TU Delft at the section of Wind Energy in the AWEP Department in the same year.
