Results 11 to 20 of about 1,147,066 (240)
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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On the relation between broadband noise and aerodynamic fan performance
, 2007 The influence of fan speed and fan loading on broadband noise has been experimentallyinvestigated in a low-speed scale fan rig. Based on the measurements, a simple semi-empiricalnoise model has been developed.
Moreau, A., +2 more
core +9 more sources
Frontiers in Physics, 2023 The jellyfish-like flying machine is a new development direction of the future bionic flapping-wing aircraft besides the insect-mimic and bird-mimic micro air vehicles (MAVs).
Xueguang Meng +3 more
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Numerical and Experimental Study on Mode Identification Error Characteristics of Fan Noise
Frontiers in Energy Research, 2022 The influence of different test methods on the accuracy of mode identification is not clear, and it is necessary to explore the error transfer characteristics in mode decomposition of fan noise. Numerical and experimental research studies are carried out
Kunbo Xu +3 more
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Frontiers in Energy Research, 2022 This paper presents a detailed investigation about the modal coherence characteristics of turbomachinery noise. The modal coherence characteristics of ducted noise at high frequencies are investigated by establishing three kinds of ducted sound source ...
Kunbo Xu +3 more
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Performance and noise trade-offs on a civil airliner with over-the-wing engines [PDF]
, 2011 Community noise has become a major consideration in the design of new aircraft. The noise generated by the engines has decreased over the generations to the extent that a whole-airframe approach is required now to achieve further significant reductions ...
Joseph, P.F. +5 more
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Applied Sciences, 2022 As the next-generation high-speed transportation system, the low vacuum tube high-speed maglev system combines the tube with a certain degree of vacuum with the high-speed maglev train, which can realize high-speed operation under low aerodynamic ...
Jiali Liu +3 more
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Nihon Kikai Gakkai ronbunshu, 2020 Noise generated from Shinkansen trains mainly consists of wheel/rail noise, bridge noise and aerodynamic noise. Generally rolling noise and structure-borne noise from a viaduct increase in proportional to the second to third power of the train speed ...
Toki UDA, Toshiki KITAGAWA
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Influence of separated vortex on aerodynamic noise of an airfoil blade [PDF]
, 2010 In order to clarify the mechanism by which aerodynamic noise is generated from separated flow around an airfoil blade, the relation between the attack angle and the aerodynamic noise of the blade was analyzed using a wind tunnel experiment and a CFD code.
Hayashi, Hidechito +4 more
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Advances in Mechanical Engineering, 2019 When the aircraft opens the bay door to let the landing gear either drop or retract, the incoming flow will result in a significant amount of coupling noise from the bay and the landing gear.
Kun Zhao +4 more
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