Numerical Modeling Screen for Flow and Noise Control Around Tandem Cylinders

Numerical Simulations of a Landing Gear with Flow Through Fairings for Noise Mitigation

“…Its porosity is 𝛽 = (1 − 𝑑/ℎ) 2 =0.64. These characteristics have been selected so that they match those from previous studies in the framework of the IMAGE project [7,8] 2) The second one, proposed by DLR in the framework of the INVENTOR project, offers significantly more resistance to the flow and will be referred to as the fine wire mesh in the following. Its wire diameter is 𝑑 = 0.042 mm and an opening size of ℎ = 0.182 mm.…”

“…Most of the fairings considered in practice are usually made of perforated plates e.g. [4], but other alternative, such as wire meshes appear as a valuable option [5][6][7][8]. A dedicated program to study and categorize flow-through fairings for the mitigation of landing gear noise is currently under progress in the framework of the European Union Horizon 2020 research project INVENTOR (INnoVative dEsign of iNstalled airframe componenTs for aircraft nOise Reduction).…”

A Critical Review of Supersonic Flow Control for High-Speed Applications

“…Although significant research has been conducted in the form of noise measurements and Reynolds-averaged Navier-Stokes (RANS) calculations to enhance the fluid insert technology [57,58], the reason why these inserts work is still not understood completely. The correlation of changes in the flow field with corresponding changes in the noise is inadequate, using only existing RANS data [59,60]. It was suggested that unstable scale-resolving simulations be used to obtain more insight into the flow field and to better understand noise reduction techniques [56].…”