Abstract Motivated by the growing concerns for noise emissions generated interaction between engine jet and airframe surfaces consequent to progressive increase of by-pass ratio in commercial aircraft architectures, we study estimation far-field radiated a an installed configuration based on sensor readings near field jet. We carry out experimental investigation jet-surface phenomena simplified...

An algorithm to compute the silent base flow sources of sound in a jet is introduced. The algorithm is based on spatiotemporal filtering of the flow field and is applicable to multifrequency sources. It is applied to an axisymmetric laminar jet and the resulting sources are validated successfully. The sources are compared to those obtained from two classical acoustic analogies, based on quiesce...

This paper investigates the application of flow-permeable materials as a solution for reducing jet-installation noise. Experiments are carried out with flat plate placed in near field single-stream subsonic jet. The is modular and solid surface trailing edge can be replaced different inserts, such metal foam perforated structure. time-averaged jet flow characterized through planar PIV measureme...