A Model for Turbulent Combustion Noise
We validate a spectral model for the fluctuating heat release rate of turbulent premixed flames which can be used in the source term of the acoustical wave equation to calculate the noise emission of turbulent combustion devices. The model is based on an assumed Eulerian model spectrum of progress variable, on a turbulent combustion model and on a space time mapping which allows to transform the spatial spectrum into a temporal spectrum needed for the acoustical wave equation. The details and the overall performance of the model were validated experimentally on premixed swirling jet flames using optical and acoustical measurement techniques, which are explained in the paper. The comparison is very good suggesting that the model can be applied in the engineering practice which is demonstrated on two examples.
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Document Type: Research Article
Publication date: 2009-05-01
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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