[HTML][HTML] Turbulent boundary layer trailing-edge noise: Theory, computation, experiment, and application
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 …
scattered by a sharp trailing edge, acoustic energy is generated and propagated to the far …
Combustion and engine-core noise
M Ihme - Annual Review of Fluid Mechanics, 2017 - annualreviews.org
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 …
reduction of noise from airframe, fan, and jet exhaust have made noise contributions from an …
Rigorous data‐driven computation of spectral properties of Koopman operators for dynamical systems
MJ Colbrook, A Townsend - Communications on Pure and …, 2024 - Wiley Online Library
Koopman operators are infinite‐dimensional operators that globally linearize nonlinear
dynamical systems, making their spectral information valuable for understanding dynamics …
dynamical systems, making their spectral information valuable for understanding dynamics …
[HTML][HTML] On the optimum separation distance for minimum noise of contra-rotating rotors
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 …
increasingly common in future electric propulsion, since they provide one of the most …
Turbomachinery noise predictions: present and future
S Moreau - Acoustics, 2019 - mdpi.com
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 …
stages mainly) is expected to increase significantly. A review of analytical models and …
Experimental and analytical investigation of contra-rotating multi-rotor UAV propeller noise
Contra-rotating propellers could increase the efficiency and lifting capacity of multi-rotor
unmanned aerial vehicles (UAVs); however, contra-rotating propellers can produce …
unmanned aerial vehicles (UAVs); however, contra-rotating propellers can produce …
Aeroacoustics of a ducted fan ingesting an adverse pressure gradient boundary layer
The aeroacoustics of a boundary layer ingesting (BLI) ducted fan is investigated
experimentally. The study examines a ducted fan immersed in an adverse streamwise …
experimentally. The study examines a ducted fan immersed in an adverse streamwise …
An overview of testing methods for aeroengine fan noise
We are now at a point where airframes, aeroengines and their integration require radical
changes to meet increasingly aggressive environmental targets. Generally, fan noise …
changes to meet increasingly aggressive environmental targets. Generally, fan noise …
Large Eddy Simulation of a scale-model turbofan for fan noise source diagnostic
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 NASA Source Diagnostic Test turbofan has been successfully performed for the first time …
On the reduction of the noise in a low-pressure turbine cascade associated with the wavy leading edge
J Han, Y Zhang, S Li, W Hong, D Wu - Physics of Fluids, 2023 - pubs.aip.org
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) …
pass ratio engines. In this paper, the feasibility and mechanism of wavy leading edge (WLE) …