Results 31 to 40 of about 11,915 (202)

Lift-up, Kelvin-Helmholtz and Orr mechanisms in turbulent jets [PDF]

, 2020
Three amplification mechanisms present in turbulent jets, namely lift-up, Kelvin–Helmholtz and Orr, are characterized via global resolvent analysis and spectral proper orthogonal decomposition (SPOD) over a range of Mach numbers.
Cavalieri, André V. G., Colonius, Tim, Nogueira, Petrônio A. S., Pickering, Ethan, Rigas, Georgios, Schmidt, Oliver T.   +5 more
core   +2 more sources

Generation and Mitigation Mechanism Studies of Nonlinear Thermoacoustic Instability in a Modelled Swirling Combustor with a Heat Exchanger

Aerospace, 2021
In the present work, 3D Unsteady Reynolds-Averaged Navier-Stokes (URANS) simulations are performed to investigate the generation and mitigation mechanism of combustion-sustained thermoacoustic instabilities in a modelled swirl combustor.
Yuze Sun, Dan Zhao, Xiaowei Zhu
doaj   +1 more source

A fourier pseudospectral method for some computational aeroacoustics problems

, 2006
A Fourier pseudospectral time-domain method is applied to wave propagation problems pertinent to computational aeroacoustics. The original algorithm of the Fourier pseudospectral time-domain method works for periodical problems without the interaction ...
Huang, Xun, Zhang, Xin
core   +1 more source

Optimization and engineering verification of excitation scheme for aircraft ground vibration test

Hangkong gongcheng jinzhan
Ground vibration test is an important part of aircraft model development and strength verification. In aircraft ground vibration test，an appropriate excitation scheme can significantly shorten the test's period and improve the accuracy of mode ...
CHEN Haoyu, WANG Binwen, SONG Qiaozhi, LI Xiaodong   +3 more
doaj   +1 more source

Numerical evaluation of the aerodynamic and noise characteristics of an axial flow fan in a large aeroacoustic wind tunnel

Kongqi donglixue xuebao
This study numerically investigates the flow field and aerodynamic performance of the axial fan system in the 4 m × 3 m low-turbulent and aeroacoustic wind tunnel of Beihang University (BHAW).
Peiqing LIU, Peiqing LIU, Yue CHEN, Yue CHEN, Jin ZHANG, Jin ZHANG, Qiulin QU, Qiulin QU, Hao GUO, Hao GUO, Lichuan MA, Lichuan MA   +11 more
doaj   +1 more source

Theoretical Study of the Acoustic Installation Effects in Closed-Vein Wind Tunnels for the Experimental Characterization of Trailing Edge Noise

Applied Sciences, 2021
This study focuses on the acoustic installation effects that may occur during typical aeroacoustic experiments when the latter are conducted in a closed-vein wind tunnel.
Stéphane Redonnet
doaj   +1 more source

Experimental Prediction Method of Free-Field Sound Emissions Using the Boundary Element Method and Laser Scanning Vibrometry

Acoustics
Acoustic emissions play a major role in the usability of many product categories. Therefore, mitigating the emitted sound directly at the source is paramount to improve usability and customer satisfaction.
Andreas Wurzinger, Florian Kraxberger, Paul Maurerlehner, Bernhard Mayr-Mittermüller, Peter Rucz, Harald Sima, Manfred Kaltenbacher, Stefan Schoder   +7 more
doaj   +1 more source

Computational aeroacoustics of human phonation

EPJ Web of Conferences, 2013
The current paper presents a CFD model of flow past vibrating vocal folds coupled to an acoustic solver, which calculates the sound sources from the flow field in a hybrid approach.
Šidlof P., Zörner S.
doaj   +1 more source

Quantum Iterative Methods for Solving Differential Equations with Application to Computational Fluid Dynamics

Advanced Quantum Technologies, EarlyView.
Quantum algorithms for differential equations are developed with applications in computational fluid dynamics. The methods follow an iterative simulation framework, implementing Jacobi and Gauss–Seidel schemes on quantum registers through linear combinations of unitaries.
Chelsea A. Williams, Antonio A. Gentile, Vincent E. Elfving, Daniel Berger, Oleksandr Kyriienko   +4 more
wiley   +1 more source

Effect of Blade Curvature on Fan Integration in Engine Cooling Module

Acoustics, 2020
Two blade curvatures representative of those found in automotive fans are compared. Measured performances are analyzed for forward and backward curved blades, either with or without heat-exchangers placed in front of them.
Manuel Henner, Bruno Demory, Mohamed Alaoui, Maxime Laurent, Benjamin Behey   +4 more
doaj   +1 more source