Analysis of the SPL Spectra Generated by Axial Flow Fans Working Under Similarity Conditions

Cattanei, Andrea; Canepa, Edward

doi:10.2514/6.2011-2872

Cited by 1 publication

(4 citation statements)

References 6 publications

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“…(2) and (3) ). Instances of OASPL scaling, taken from [6], and related to three geometrically similar fans, of different D and rotating at different , are shown in Fig. 1.…”

Section: B Applications Of the Similarity Theorymentioning

confidence: 99%

“…2, taken from [6], are relative to three similar fans and are scaled according to Eqs. (5-6); these plots provide an evaluation of the extent up to which the scaling law is respected.…”

Section: B Applications Of the Similarity Theorymentioning

confidence: 99%

“…The active noise generating mechanisms have a clear correspondence in the constant-bandwidth SPL spectrum [6,7]:…”

Section: A Generating Mechanisms and Shape Of The Spl Spectrummentioning

confidence: 99%

“…No obstacles should be present close to the upstream duct mouth since they could break the flow axisymmetry as well as creating large-scale disturbances. Such aspects are treated in [6,7,19]. However, the above listed guidelines are related to the aerodynamic effects of the fan installation, but acoustic effects, such as diffraction and shielding may take place as well, which have important influence on the received noise.…”

Section: B Installation and Operation Of A Fan Versus Noise Emissionmentioning

confidence: 99%

See 3 more Smart Citations

Aerodynamic noise from cooling and HVAC systems features important to land vehicles in urban traffic conditions

Canepa

Cattanei

Zecchin

2013

2013 International Conference on Connected Vehicles and Expo (ICCVE)

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Abstract-The present paper deals with the aerodynamic noise generated by cooling and HVAC systems employed in land vehicles. After a brief description of the physical origin of aerodynamic noise, the features important to system engineers dealing with fans installation and operation are considered. First, the main scaling laws useful to estimate the sound level spectrum are reported. Then, the main characteristics of the sound pressure level spectrum are related to the typical aerodynamic generating mechanisms and to the quality of the perceived sound, and some guidelines for noise reduction are listed. Finally, a method for the employ of results obtainable from laboratory tests is proposed which aims to identify the origin of annoying fluctuations in the received noise.

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“…(2) and (3) ). Instances of OASPL scaling, taken from [6], and related to three geometrically similar fans, of different D and rotating at different , are shown in Fig. 1.…”

Section: B Applications Of the Similarity Theorymentioning

confidence: 99%

“…2, taken from [6], are relative to three similar fans and are scaled according to Eqs. (5-6); these plots provide an evaluation of the extent up to which the scaling law is respected.…”

Section: B Applications Of the Similarity Theorymentioning

confidence: 99%

“…The active noise generating mechanisms have a clear correspondence in the constant-bandwidth SPL spectrum [6,7]:…”

Section: A Generating Mechanisms and Shape Of The Spl Spectrummentioning

confidence: 99%

Section: B Installation and Operation Of A Fan Versus Noise Emissionmentioning

confidence: 99%

See 2 more Smart Citations

Aerodynamic noise from cooling and HVAC systems features important to land vehicles in urban traffic conditions

Canepa

Cattanei

Zecchin

2013

2013 International Conference on Connected Vehicles and Expo (ICCVE)

Self Cite

View full text Add to dashboard Cite

show abstract

Analysis of the SPL Spectra Generated by Axial Flow Fans Working Under Similarity Conditions

Cited by 1 publication

References 6 publications

Aerodynamic noise from cooling and HVAC systems features important to land vehicles in urban traffic conditions

Aerodynamic noise from cooling and HVAC systems features important to land vehicles in urban traffic conditions

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