2 edition of Aerodynamic noise found in the catalog.
by American Institute of Aeronautics and Astronautics
Written in English
|Statement||edited by A. Goldburg.|
|Series||American Institute of Aeronautics and Astonautics Selected Reprint Series -- v.11|
Apr 07, · noise generated by turbulence and laminar flow over wings. Preliminary Results. To understand this phenomenon, it is important to understand the methods by which aerodynamic noise is generated. Though there are many sources by which noise if generated across a wind turbine, this research will primarily explore the noise generated of the. Aerodynamic Noise Simulation Technology for Developing Low Noise Products 43 issue: Simulation Technologies for Product Development phenomena. It is based on the ﬂ ow statistically time-averaged for speciﬁ c ﬂ ow conditions and cannot be said to adequately reproduce the phenomenon as a ﬂ uid.
In terms of experiments, numerous experiments are conducted to recognize aerodynamic noise characteristics, generation mechanism and propagation rule , the pulsating pressure generated from the running train is the aerodynamic noise source, and the corresponding measures are also proposed to reduce aerodynamic ducklakebooks.com: Zhi Tang, Zhi-hui Liu, Qian Wang, Zhen Li. For improving noises in the cabin quickly, large eddy simulation was adopted to compute the fluctuating pressure of the cabin surface numerically. Then, the fluctuating pressure was mapped to the boundary element model as the excitation loads to obtain the aerodynamic noise distribution of the cabin at different frequencies, which was then compared with the experimental result. There were some Author: Ming Lv, Dong-er Xu, Hua He.
For high-speed trains, aerodynamic noise becomes significant when their speeds exceed km/h and can become predominant at higher speeds. Since the environmental requirements for railway operations will become tighter in the future, it is necessary to understand the aerodynamic noise generation and radiation mechanism from high-speed trains by studying the flow-induced noise characteristics Cited by: 2. May 20, · First, using the experimental train “FASTECH”, we identified the noise source from around wheels. We confirmed that noise from around the wheels was aerodynamic noise generated from air through the ventilation route of brake discs. Thus, we developed a low-noise brake disc for new Shinkansen Trains “Series E5.”Author: N. Shiraishi, Y. Wakabayashi, T. Kurita, T. Fujimoto, Y. Ichikawa.
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Nov 10, · Aerodynamic Noise: An Introduction for Physicists and Engineers (Springer Aerospace Technology) [Tarit Bose] on ducklakebooks.com *FREE* shipping on qualifying offers.
Aerodynamic Noise extensively covers the theoretical basis and mathematical modeling of sound, especially the undesirable sounds produced by aircraft. This noise could come from an aircraft’s engine―propellers5/5(1). David Thompson, in Railway Noise and Vibration, Publisher Summary. Aerodynamic noise is a phenomenon associated with high speed operation.
This means that when the construction of new high speed lines is proposed, it often leads to opposition on the grounds of noise, even more than for conventional lines.
“Aerodynamic Noise is a seven step introductory textbook on numerical aero-acoustics. Aerodynamic Noise is a good course book and is also a useful reference for anyone wanting to quickly get up to speed on numerical aeroacoustics.
It could be used at the senior undergraduate or graduate level of study. Brand: Springer-Verlag New York. Nov 10, · Aerodynamic Noise: An Introduction for Physicists and Engineers (Springer Aerospace Technology Book 7) - Kindle edition by Tarit Bose.
Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Aerodynamic Noise: An Introduction for Physicists and Engineers (Springer Aerospace Technology Book 5/5(1). Book Description: The growth of aviation and the increasing size and power of aircraft has made aerodynamic noise a major problem.
Control of this noise will only be possible when more is known of its generation, propagation, and attenuation. Aerodynamic noise refers to the noise generated by unsteady flow.
It is also called aeroacoustics or flow noise. The noise sources can be connected with a turbulent flow, as in jet or boundary. The majority of the sound produced is due to the motion of air and its interaction with solid boundaries, and this is the main discussion of the book.
With problem sets at the end of each chapter, Aerodynamic Noise is ideal for graduate students of mechanical and aerospace engineering. Generally speaking, centrifugal fan noise is composed of electromagnetic noise, mechanical noise and aerodynamic noise, among which aerodynamic noise is often a prominent contributor including rotating noise and vortex noise [5, 6, 7], as illustrated in Figure Nov 09, · The majority of the sound produced is due to the motion of air and its interaction with solid boundaries, and this is the main discussion of the book.
With problem sets at the end of each chapter, Aerodynamic Noise is ideal for graduate students of mechanical and aerospace ducklakebooks.com: Springer New York. Fan noise measurement. For many years it has been known that the aerodynamic performance of a fan is dependent on the ductwork connections attached to the fan inlet and/or outlet.
If the fan is to develop its maximum pressure capability, then air must be presented to its inlet as a symmetrical and substantially fully developed velocity. Note: Citations are based on reference standards.
However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied. Automotive aerodynamics is the study of the aerodynamics of road vehicles.
Its main goals are reducing drag and wind noise, minimizing noise emission, and preventing undesired lift forces and other causes of aerodynamic instability at high speeds. Air is also considered a fluid in this case.
Lecture Notes of a Short Course on the Aerodynamic Noise of Turbomachines performed at Pennsylvania State University, University Park, Pennsylvania, USA, July ; United Technology.
Aerodynamic Noise: An Introduction for Physicists and Engineers - Ebook written by Tarit Bose. Read this book using Google Play Books app on your PC, android, iOS devices.
Download for offline reading, highlight, bookmark or take notes while you read Aerodynamic Noise: An Introduction for. Aircraft noise pollution is a harmful noise effect produced by any aircraft or its components during the various phases of a flight. Sound production is divided into three categories: Mechanical noise—rotation of the engine parts, most noticeable when fan blades reach supersonic speeds.
Book Editor(s): Malcolm J. Crocker. Department of Mechanical Engineering, Auburn University, Auburn, AlabamaUSA.
Search for more papers by this author Differences between Aerodynamic Noise and Linear and Nonlinear Acoustics. Derivation of Lighthill's Equation for Aerodynamic Noise.
Structure of Turbulent Shear ducklakebooks.com by: 2. Gas Flow and Aerodynamic Noise in Control Valves A short discussion of basic acoustics is presented to provide an understanding of noise terminology.
Aerodynamic noise generation is discussed along with descriptions of various valve designs that reduce the potential for excessive noise. Aerodynamic Noise | Aerodynamic Noise extensively covers the theoretical basis and mathematical modeling of sound, especially the undesirable sounds produced by aircraft.
This noise could come from an aircraft's engine--propellers, fans, combustion chamber, jets--or the vehicle itself--external surfaces--or from sonic booms. • Cause of aerodynamic noise • Aerodynamic noise reduction techniques The speaker, Dr.
Jon F. Monsen, PE, is a Control Valve Technology Specialist at Valin Corporation where he specializes in training, control valve applications, and smart digital products. “Teapots are not generally known for their aerodynamic qualities, hence the proclivity for their use during breaks between fighting rather than as an actual weapon of war.” ― Jeffery Russell, The Dungeoneers.
Apr 25, · Vehicle Body Engineering Aerodynamics Introduction: is by Air resistance & Rolling resistance • The vehicle drag is a force which resists motion and is due to ; a) the deformation of the wheel and the ground b) aerodynamic effects of air flow over the vehicle • Deformation of the wheel - the pneumatic tyres are most suitable for road.Inter-noise Page 1 of 8 On the reduction of the engine and aerodynamic noise of aircraft L.
M. B. C. CAMPOS1 1 LAETA, (Centro de Ciências e Tecnologias Aeronáuticas e Espaciais – CCTAE), Instituto Superior Técnico (IST), Universidade de Lisboa, Portugal.Apr 12, · This page will explain the origins of noise generation from small axial cooling fans used in electronic goods like desktop/laptop computers.
The source of fan noises includes aerodynamic noise as well as operating sound of the fan itself. This page will be focused on the aerodynamic noise generation mechanisms. Introduction.