When the pressure fluctuations caused by turbulence vorticity in the boundary layer are
scattered by a sharp trailing edge, acoustic energy is generated and propagated to the far …

The implementation of advanced low-emission aircraft engine technologies and the
reduction of noise from airframe, fan, and jet exhaust have made noise contributions from an …

Koopman operators are infinite‐dimensional operators that globally linearize nonlinear
dynamical systems, making their spectral information valuable for understanding dynamics …

Overlapping rotor systems are currently used on some urban flight vehicles and will become
increasingly common in future electric propulsion, since they provide one of the most …

In future Ultra-High By-Pass Ratio turboengines, the turbomachinery noise (fan and turbine
stages mainly) is expected to increase significantly. A review of analytical models and …

Contra-rotating propellers could increase the efficiency and lifting capacity of multi-rotor
unmanned aerial vehicles (UAVs); however, contra-rotating propellers can produce …

The aeroacoustics of a boundary layer ingesting (BLI) ducted fan is investigated
experimentally. The study examines a ducted fan immersed in an adverse streamwise …

We are now at a point where airframes, aeroengines and their integration require radical
changes to meet increasingly aggressive environmental targets. Generally, fan noise …

A wall-modeled statistically converged Large Eddy Simulation (LES) of the turbulent flow in
the NASA Source Diagnostic Test turbofan has been successfully performed for the first time …

The low-pressure turbine (LPT) has become a potential noise source for future ultra-high by-
pass ratio engines. In this paper, the feasibility and mechanism of wavy leading edge (WLE) …