Authors Version Internoise2013 Paper 0751.pdf (2.84 MB)
Air intake system noise in a turbocharged petrol engine during transient operation
conference contribution
posted on 2014-01-16, 13:10 authored by Ajith Pai, Stephen Walsh, Daniel O'BoyDaniel O'Boy, Rui ChenEngine downsizing is undertaken in the automotive industry in order to reduce the emissions and the fuel
consumption of the vehicle. Turbocharging is one of the important methods to enable downsizing of the
engine; however, increased noise is the side-effect of this introduction. The noise generation is assumed to
be due to the operation of turbocharger very close to the surge zone of the compressor map. For example,
the compressor map is typically measured under static laboratory test conditions and may be different in the
dynamic environment of the intake system during engine operation. The aim of this paper is to outline the
methods used by the authors to predict and measure the turbocharger noise generation and also to
understand its fundamental mechanism. A naturally aspirated car is chosen to measure the noise generated
at the intake system as a starting point. Analysis methods such as STFT for the acquired data measured are
explained. This will form a basis for further analysis on a turbocharged car. A simulation methodology is
outlined in order to predict the noise generation mechanism. The static pressures predicted on various
locations of intake system, such as upstream and downstream of compressor, are processed to obtain
estimates of the sound pressure in both the frequency and the time domains. A modular turbocharger rig is
designed to study the intake system dynamics during compressor surge operation and to further understand
the noise generation mechanism. The paper is concluded by listing the future work planned.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Citation
PAI, A.V. ... et al, 2013. Air intake system noise in a turbocharged petrol engine during transient operation. Presented at Internoise 2013 the 42nd International Congress and Exposition on Noise Control Engineering, 15th-18th September 2013, Innsbruck, Austria.Publisher
Curran Associates on behalf of International Institute of Noise Control Engineering (I-INCE) / © The authorsVersion
- AM (Accepted Manuscript)
Publication date
2013Notes
This is a conference paper.ISBN
9781632662675Language
- en