Powell, A., Aerodynamic noise and the plane boundary, J. Acoust. Soc. America, 32, 982-990, (1960).Powell, A. 1960, Aerodynamic noise and the plane boundary, J. Acoust Soc. Am., Vol. 32, pp. 982-990.HPowell, A., "Aerodynamic Noise and the Plane Boundary," Journal of the ...
The aerodynamic noise in the upper part of the vehicle is regarded as a limited long-line sound source without directivity in the Hokuriku method. From:High-Speed Railways,2023 About this page Set alert Chapters and Articles You might find these chapters and articles relevant to this topic. ...
boundary element methodnoise contributionAs one of the main aerodynamic noise sources of high-speed trains, the pantograph is a complex structure containing many components, and the flow around it is extremely dynamic, with high-level turbulence. This study analyzed the near-field unsteady flow ...
Helicopters are cool because they make so much noise that the earth can’t stand to be near them, providing lift. Now, there’s a huge list of pros and cons for each and there’s certainly a reason we use airplanes and not dirigibles for most tasks. The Cyclocrane was designed to ...
turbines, are introduced. Next, state-of-the-art advancedaerodynamic modelsis presented. This includesvortex models, generalized actuator disk/line models, andcomputational fluid dynamics(CFD). Finally, a short introduction is given to rotor optimization and modeling of aerodynamically generated noise. ...
An analysis of tone noise propagation through a boundary layer and fuselage scattering effects was derived. This analysis is a three dimensional and the co... B Magliozzi,DB Hanson - 《Final Report Hamilton Standard Windsor Locks Ct》 被引量: 46发表: 1991年 Aeroacoustic design of a 6-bladed...
The noise is generated by theinteraction between the non-aerodynamic components of thelanding gear and the flow, which leads to turbulence generatednoise. This research presents results from the European CleanSky funded ALLEGRA project. The... E Neri,J Kennedy,GJ Bennett - Asme Noise Control & ...
Fuller and von Flotow[259]studied active noise control from a commercial standpoint. It was concluded that near-term market penetration of active noise control technology was expected to be through high-tech, expensive applications. Theaircraft cabinwas proposed as an application field. ...
This shows that for aerodynamically induced car interior noise, both contributions to the surface pressure fluctuations on car windows have to be taken into account. 展开 关键词: Sound pressure Aerodynamics Aerodynamic noise Acoustic noise Boundary layer turbulence ...
The mileage of the diesel hybrid railcar is better than that of a conventional diesel train by approximately 20%. Additionally, it emits less noise (∼30dB) while stopping at stations. Furthermore, the latest exhaust system has reduced toxic substances in the exhaust gas (nitrogen oxide, grap...