Aerodynamic Noise Separation of an EMU Trailer Bogie Area Using Train Operation Tests
Shock and Vibration, 2018 The operation transfer path analysis (OTPA) technique was used to measure the vibration and noise transfer coefficient functions of wheel-rail noise and radiated noise from an electric multiple unit (EMU) train (high-speed train in China) trailer bogie ...
Leiming Song, Hao Chen, Baochuan Li
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Predicting Quadcopter Drone Noise Using the Lattice Boltzmann Method [PDF]
The market for new vertical takeoff and landing vehicles, including autonomous urban air taxis and drones for applications such as package delivery, imaging, and surveillance, is growing rapidly.
Barad, Michael +3 more
core +1 more source
Evaluating the Aerodynamic Impact of Circumferentially Grooved Fan Casing Treatments with Integrated Acoustic Liners on a Turbofan Rotor [PDF]
NASA is investigating the potential of integrating acoustic liners into fan cases to reduce fan noise, while maintaining the fan's aerodynamic performance.
Bozak, Richard F., Podboy, Gary G.
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Advanced acoustic and aerodynamic 20-inch fan program [PDF]
The aerodynamic analyses, mechanical analyses, and stress tests of a 20-inch diameter advanced fan design intended for acoustic investigation by NASA-LeRC are discussed.
Erwin, J. R., Heldenbrand, R. W.
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A review of aerodynamic noise from propellers, rotors, and lift fans [PDF]
Hand calculation procedures for predicting aerodynamic noise from propellers, rotors, and lift ...
Kurtz, D. W., Marte, J. E.
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Numerical study on wind-induced noise characteristics of typical rods in open area of cruise ship
Zhongguo Jianchuan YanjiuObjectiveThis paper aims to study the wind-induced noise of typical rods in the open areas of cruise ships. MethodsThe numerical simulation of aerodynamic noise and wind-induced vibration noise is carried out using computational fluid dynamics (CFD ...
Zhiqiang YAO, Weiguo WU, Yongshui LIN
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Adaptability of Turbulence Models for Pantograph Aerodynamic Noise Simulation
Shock and Vibration, 2019 This study was targeted at CX-PG-type Faiveley pantograph of high-speed train and cylinders and analysed the fluctuating flow field around these objects by using the large eddy simulation (LES) model, the scale adaptive simulation (SAS) model, the ...
Xiao-ming Tan +3 more
semanticscholar +1 more source
Investigation to define the propagation characteristics of a finite amplitude acoustic pressure wave [PDF]
A theoretical analysis of the propagation characteristics of a finite amplitude pressure wave is presented. The analysis attempts to study the contribution of entropy-producing regions to the mechanism of aerodynamic noise generation.
Cottrell, J. W., Peter, A. C.
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Analytic solution for aerodynamic noise generated by plates with spanwise-varying trailing edges
Journal of Fluid Mechanics, 2018 This paper presents an analytic solution for aerodynamic noise generated by an unsteady wall pressure gust interacting with a spanwise-variable trailing edge in a background steady uniform flow. Viscous and nonlinear effects are neglected.
Lorna J. Ayton
semanticscholar +1 more source
Surrogate Based Optimization of Aerodynamic Noise for Streamlined Shape of High Speed Trains
Applied Sciences, 2017 Aerodynamic noise increases with the sixth power of the running speed. As the speed increases, aerodynamic noise becomes predominant and begins to be the main noise source at a certain high speed.
Zhenxu Sun, Ye Zhang, Guowei Yang
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