This paper presents numerical analyses of aerodynamics and aeroacoustics ducted/un-ducted propellers based on high-fidelity CFD methods, adjoint-based aerodynamic performance optimisation the ducted propeller by altering duct blade shapes. Ducted experiments NASA are chosen for validation used as baseline designs. High-fidelity simulations performed using in-house solver HMB3. The is analysed s...

We present the latest developments of our High-Order Spectral Element Solver (HORSES3D), an open source high-order discontinuous Galerkin framework, capable solving a variety flow applications, including compressible flows (with or without shocks), incompressible flows, various RANS and LES turbulence models, particle dynamics, multiphase aeroacoustics. provide overview spatial discretisation (...

We propose a new direct coupling scheme based on the overset technique to tackle moving boundary problems within lattice Boltzmann framework. The is interpolation of distribution functions rather than moments, that is, macroscopic variables, and includes an additional hypothesis ensuring mass momentum conservation at interface nodes between fixed grids. method assessed considering four test cas...

Hybrid electric propulsion is a promising solution to reduce aircraft emissions, thus improving the sustainability of air transport. In this work, hybrid configuration with rear-mounted boundary layer ingestion (BLI) engine has been investigated. The partial embedding into fuselage generates distortion ingested inflow causing additional tonal and broadband BLI noise sources, and, at same time, ...

The casing of large electrical generators can be deformed slightly by the rotor's magnetic field. The sound emission produced by these periodic deformations, which could possibly exceed guaranteed noise emission limits, is analyzed analytically and numerically. From the deformation of the casing, the normal velocity of the generator's surface is computed. Taking into account the corresponding s...