Activities per year
Abstract
In this article, the acoustic characterisation of a turbocharger compressor with ported shroud design is carried out through the numerical simulation of the system operating under design conditions of maximum isentropic efficiency. While ported shroud compressors have been proposed as a way to control the flow near unstable conditions in order to obtain a more stable operation and enhance deep surge margin, it is often assumed that the behaviour under stable design conditions is characterised by a smooth, non-detached flow that matches an equivalent standard compressor. Furthermore, research is scarce regarding the acoustic effects of the ported shroud addition, especially under the design conditions. To analyse the flow field evolution and its relation with the noise generation, spectral signatures using statistical and scale-resolving turbulence modelling methods are obtained after successfully validating the performance and acoustic predictions of the numerical model with experimental measurements. Propagation of the frequency content through the ducts has been estimated with the aid of pressure decomposition methods to enhance the content coming from the compressor. Expected acoustic phenomena such as ‘buzz-saw’ tones, blade passing peaks and broadband noise are correctly identified in the modelled spectrum. Analysis of the flow behaviour in the ported shroud shows rotating structures through the slot that may impact the acoustic and vibration response. Further inspection of the pressure field through modal decomposition confirms the influence of the ported shroud cavity in noise generation and propagation, especially at lower frequencies, suggesting that further research should be carried out on the impact these flow enhancement solutions have on the noise emission of the turbocharger.
Original language | English |
---|---|
Pages (from-to) | 1454-1468 |
Number of pages | 15 |
Journal | International Journal of Engine Research |
Volume | 21 |
Issue number | 8 |
Early online date | 27 Nov 2018 |
DOIs | |
Publication status | Published - 1 Oct 2020 |
Fingerprint
Dive into the research topics of 'Acoustic characteristics of a ported shroud turbocompressor operating at design conditions'. Together they form a unique fingerprint.Profiles
-
John Allport
- Department of Engineering - Professor of Turbocharger Engineering
- School of Computing and Engineering
- Centre for Efficiency and Performance Engineering - Member
Person: Academic
Activities
- 1 Invited talk
-
Numerical analysis of flow-induced noise in a high-speed centrifugal compressor
Sidharath Sharma (Speaker) & John Allport (Speaker)
22 Jan 2019 → 24 Jan 2019Activity: Talk or presentation types › Invited talk