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Lighthill’s Theory of Aerodynamic Noise
2012In 1952, Lighthill [61] gave the first formulation of aerodynamic sound, which is based on an analogy of sound radiated by fluctuating monopole, dipole, or quadrupole sound sources. Lighthill’s treatment of the subject will be discussed in this chapter, which starts with a derivation of an equation of sound.
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Remarks on the theory of aerodynamic noise
The Journal of the Acoustical Society of America, 1975Lighthill's theory of aerodynamic noise has been the foundation of the current noise research. The theory is exact and based on an acoustic analogy. The source strength, however, can be found only when the problem is solved. To make a quantitative calculation, one has to make various approximations to the theory.
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Measurement and Evaluation of Aerodynamic Noise
SAE Technical Paper Series, 1999<div class="htmlview paragraph">Recently, aerodynamic noise which originates in the flow of the body surroundings is actualized as a main cause of an automobile interior noise when running at high speed, because engine, power train and tire noise have been greatly decreased. Along with it, the measurement technology for the phenomenon elucidation
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Aircraft Aerodynamic Noise Measurement
2007Aircraft noise in flight is mostly produced from propulsion system (engine and propeller, for propeller driven aircraft), but one part of the noise come from air stream over aircraft surfaces (wings, airframe etc) – it is aerodynamic or airframe noise.
Domitrović, Anita +2 more
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Direct Computation of Aerodynamic Noise
1993In his pioneering work Lighthill formulated the problem of predicting the noise radiated by an unsteady flow in terms of an acoustic analogy. However, in order to predict the far-field noise the acoustic source terms of such acoustic analogies must be known accurately.
Sanjiva K. Lele +3 more
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Further Topics in Aerodynamic Noise
2012In principle, the convected quadrupole theory, as developed by Ffowcs-Williams, can be used also for supersonic jet noise. However, subsonic jet noise, where no complex phenomena such as shock or screeching noise exist, is based mainly on turbulent mixing.
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Effects analysis on aerodynamic noise reduction of centrifugal compressor used for gasoline engine
, 2021Chao Zhong +5 more
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Environmental science and pollution research international, 2021
Yanmei Cao, Zhe Li, Wei Ji, Mengnan Ma
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Yanmei Cao, Zhe Li, Wei Ji, Mengnan Ma
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