Investigation of turbocharger compressor surge inception by means of an acoustic two-port model

Kabral, Raimo; Åbom, Mats

doi:10.1016/j.jsv.2017.10.003

Cited by 24 publications

(6 citation statements)

References 35 publications

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“…gear shifting or sudden acceleration. Experimental measurements by Kabral andÅbom [5] provides scientific evidence that these off-design flow instabilities cause substantial sound pressure levels.…”

Section: Introductionmentioning

confidence: 99%

Acoustic signature of flow instabilities in radial compressors

Sundström

Semlitsch

Mihăescu

2018

Journal of Sound and Vibration

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Rotating stall and surge are flow instabilities contributing to the acoustic noise generated in centrifugal compressors at low mass flow rates. Their acoustic generation mechanisms are exposed employing compressible Large Eddy Simulations (LES). The LES data are used for calculating the dominant acoustic sources emerging at low mass flow rates. They give the inhomogeneous character of the Ffowcs Williams and Hawkings (FW-H) wave equation. The blade loading term associated with the unsteady pressure loads developed on solid surfaces (dipole in character

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Section: Introductionmentioning

confidence: 99%

Acoustic signature of flow instabilities in radial compressors

Sundström

Semlitsch

Mihăescu

2018

Journal of Sound and Vibration

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“…The bubbles rotate in the same direction as the wheel, due to the angular momentum transfer from the recirculations to the intake mass flow, but at a lower speed rate. The rotating speed was assessed and resulted to be spinning nearly at RO=0.5, this is, at around 1333 Hz, which coincide with the aforementioned peaks found within the whoosh noise range [46]. Conversely, from 3500 Hz to higher frequencies, the inlet geometry appears to have no impact on the PSD, except for the convergent nozzle.…”

Section: Str Tap Cd-n C-nmentioning

confidence: 69%

Analysis of the impact of the geometry on the performance of an automotive centrifugal compressor using CFD simulations

Galindo

Gil

Garcia

et al. 2019

Applied Thermal Engineering

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“…More recently, a vibrational analysis has been used to identify surge precursors [61][62][63]. Cabral et al [64] proposed a specific method based on the fully acoustic two-port model for the study of centrifugal compressor stall and surge inception. In some cases, it was found that dynamic stalls related to flow instabilities generated a high level of sound and could also locally amplify incident sound waves.…”

Section: Surges In Compression Systemmentioning

confidence: 99%

Instability Phenomena in Centrifugal Compressors and Strategies to Extend the Operating Range: A Review

Cravero,

Marsano

2024

Energies

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Centrifugal compressors are widely used in different fields. Their design requires high performance and a wide operating range, where, at lower mass flow rates, unstable flow dynamic phenomena occur, which are extremely harmful and, at the same time, complex to fully understand. This review paper presents the main research from the last 40 years on the subject of instability in centrifugal compressors, aiming to clarify the main (sometimes contradictory) causes, classifying them according to the component in which they are triggered or the interaction between them. Importance is given to works that develop criteria for the identification of the stability limit with simplified models. The main techniques used to extend the stability limit are also presented by distinguishing between passive and active fixed-flow control methods; moreover, the main works on variable geometry techniques are reported, showing the advantages and disadvantages of their use. Finally, an overview of the innovative applications of centrifugal compressors, such as fuel cells, is presented. The aim of this review is to highlight the continued interest in this field of study and provide the tools to understand the different unstable mechanisms and techniques used to extend the operating limit.

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Investigation of turbocharger compressor surge inception by means of an acoustic two-port model

Cited by 24 publications

References 35 publications

Acoustic signature of flow instabilities in radial compressors

Acoustic signature of flow instabilities in radial compressors

Analysis of the impact of the geometry on the performance of an automotive centrifugal compressor using CFD simulations

Instability Phenomena in Centrifugal Compressors and Strategies to Extend the Operating Range: A Review

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