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Acoustic and pressure characteristics of a ported shroud turbocompressor operating at near surge conditions

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Acoustic and pressure characteristics of a ported shroud turbocompressor operating at near surge conditions

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dc.contributor.author Sharma, Sidharath es_ES
dc.contributor.author Broatch, A. es_ES
dc.contributor.author GARCIA TISCAR, JORGE es_ES
dc.contributor.author Nickson, Ambrose K. es_ES
dc.contributor.author Allport, John M. es_ES
dc.date.accessioned 2020-05-12T03:01:58Z
dc.date.available 2020-05-12T03:01:58Z
dc.date.issued 2019-05 es_ES
dc.identifier.issn 0003-682X es_ES
dc.identifier.uri http://hdl.handle.net/10251/142954
dc.description.abstract [EN] The operation of compressor at lower mass flow rates is limited by surge which is marked by large fluctuations in operational variables and accompanied by significant increase in noise. Ported shroud casing treatment is a widely used method to control the flow near unstable conditions in order to obtain a stable operation and enhance deep surge margin. The research on the acoustic effects of the ported shroud design is limited. Therefore, this paper numerically characterises the acoustic features of a turbocharger compressor with ported shroud design operating at marginal or soft surge conditions and investigates the correlation between acoustic characteristics and the spatial flow structures. The acoustic and the flow field features are analysed using spectral signatures obtained from an experimentally validated numerical model using both performance and acoustic measurements. Propagation of the frequency content through the ducts has been estimated with the aid of the beamforming and method of characteristics to enhance the content coming from the compressor. Expected acoustic phenomena such as rotating order tones and blade passing peaks are correctly identified in the modelled spectrum with the limitation to capture the specific broadband features. Hence, the numerical model can be used to further the research encompassing the impact these flow enhancement solutions have on the noise emission of the turbocharger. Inspection of the flow field shows radially exiting fluid at the ported shroud slot leading to the formation of the high-speed jets exiting the ported shroud cavity. Circumferential propagation of the stall cells is also identified in the impeller. Further inspection of the pressure field through modal decomposition implies the localisation of the energetic noise sources in the impeller downstream components. The influence of the ported shroud cavity on the acoustic characteristic of the compressor is not significant and is limited to the propagation of the tonal noise in the direction of impeller upstream. (C) 2019 Elsevier Ltd. All rights reserved. es_ES
dc.description.sponsorship The project is sponsored and supported by BorgWarner Turbo Systems and the Regional Growth Fund (RGF Grant Award 01.09.07.01/1789C). The authors would like to thank BorgWarner Turbo Systems for permission to publish the results presented in this paper. The support of the HPC group at the University of Huddersfield is gratefully acknowledged. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation RGF/01.09.07.01/1789C es_ES
dc.relation.ispartof Applied Acoustics es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject LES es_ES
dc.subject Compressor es_ES
dc.subject Ported shroud es_ES
dc.subject Surge es_ES
dc.subject Noise es_ES
dc.subject Modal decomposition es_ES
dc.subject.classification INGENIERIA AEROESPACIAL es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Acoustic and pressure characteristics of a ported shroud turbocompressor operating at near surge conditions es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.apacoust.2019.01.005 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics es_ES
dc.description.bibliographicCitation Sharma, S.; Broatch, A.; Garcia Tiscar, J.; Nickson, AK.; Allport, JM. (2019). Acoustic and pressure characteristics of a ported shroud turbocompressor operating at near surge conditions. Applied Acoustics. 148:434-447. https://doi.org/10.1016/j.apacoust.2019.01.005 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.apacoust.2019.01.005 es_ES
dc.description.upvformatpinicio 434 es_ES
dc.description.upvformatpfin 447 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 148 es_ES
dc.relation.pasarela S\376170 es_ES
dc.contributor.funder Regional Studies Association, Reino unido es_ES
dc.contributor.funder BorgWarner Turbo Systems es_ES
dc.contributor.funder University of Huddersfield es_ES


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