Acoustic source data for medium speed IC-engines

Antti Hynninen (Corresponding Author), Raimo Turunen, Mats Åbom, Hans Bodén

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

Knowledge of the acoustic source characteristics of internal combustion engines (IC-engines) is of great importance when designing the exhaust duct system and its components to withstand the resulting dynamic loads and to reduce the exhaust noise emission. The goal of the present study is to numerically and experimentally investigate the medium speed IC-engine acoustic source characteristics, not only in the plane wave range but also in the high frequency range. The low frequency acoustic source characteristics were predicted by simulating the acoustic multiload measurements by using a one-dimensional process simulation code. The low frequency in-duct exhaust noise of a medium speed IC-engine can be quite accurately predicted. The high frequency source data is estimated by averaging the measured acoustic pressures with different methods; using the simple cross-spectra averaging method seems promising in this instance.
Original languageEnglish
Article number051008
Number of pages11
JournalJournal of Vibration and Acoustics
Volume134
Issue number5
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Fingerprint

internal combustion engines
Internal combustion engines
Acoustics
acoustics
ducts
Ducts
low frequencies
dynamic loads
acoustic measurement
Dynamic loads
plane waves
frequency ranges
simulation

Keywords

  • Acoustic source characteristics
  • high frequency range
  • multi-load method
  • medium speed engines

Cite this

Hynninen, Antti ; Turunen, Raimo ; Åbom, Mats ; Bodén, Hans. / Acoustic source data for medium speed IC-engines. In: Journal of Vibration and Acoustics. 2012 ; Vol. 134, No. 5.
@article{905aacde29a94dcfbc7da0941d6bf9d8,
title = "Acoustic source data for medium speed IC-engines",
abstract = "Knowledge of the acoustic source characteristics of internal combustion engines (IC-engines) is of great importance when designing the exhaust duct system and its components to withstand the resulting dynamic loads and to reduce the exhaust noise emission. The goal of the present study is to numerically and experimentally investigate the medium speed IC-engine acoustic source characteristics, not only in the plane wave range but also in the high frequency range. The low frequency acoustic source characteristics were predicted by simulating the acoustic multiload measurements by using a one-dimensional process simulation code. The low frequency in-duct exhaust noise of a medium speed IC-engine can be quite accurately predicted. The high frequency source data is estimated by averaging the measured acoustic pressures with different methods; using the simple cross-spectra averaging method seems promising in this instance.",
keywords = "Acoustic source characteristics, high frequency range, multi-load method, medium speed engines",
author = "Antti Hynninen and Raimo Turunen and Mats {\AA}bom and Hans Bod{\'e}n",
note = "Project code: 78638",
year = "2012",
doi = "10.1115/1.4006415",
language = "English",
volume = "134",
journal = "Journal of Vibration and Acoustics",
issn = "1048-9002",
publisher = "American Society of Mechanical Engineers ASME",
number = "5",

}

Acoustic source data for medium speed IC-engines. / Hynninen, Antti (Corresponding Author); Turunen, Raimo; Åbom, Mats; Bodén, Hans.

In: Journal of Vibration and Acoustics, Vol. 134, No. 5, 051008, 2012.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Acoustic source data for medium speed IC-engines

AU - Hynninen, Antti

AU - Turunen, Raimo

AU - Åbom, Mats

AU - Bodén, Hans

N1 - Project code: 78638

PY - 2012

Y1 - 2012

N2 - Knowledge of the acoustic source characteristics of internal combustion engines (IC-engines) is of great importance when designing the exhaust duct system and its components to withstand the resulting dynamic loads and to reduce the exhaust noise emission. The goal of the present study is to numerically and experimentally investigate the medium speed IC-engine acoustic source characteristics, not only in the plane wave range but also in the high frequency range. The low frequency acoustic source characteristics were predicted by simulating the acoustic multiload measurements by using a one-dimensional process simulation code. The low frequency in-duct exhaust noise of a medium speed IC-engine can be quite accurately predicted. The high frequency source data is estimated by averaging the measured acoustic pressures with different methods; using the simple cross-spectra averaging method seems promising in this instance.

AB - Knowledge of the acoustic source characteristics of internal combustion engines (IC-engines) is of great importance when designing the exhaust duct system and its components to withstand the resulting dynamic loads and to reduce the exhaust noise emission. The goal of the present study is to numerically and experimentally investigate the medium speed IC-engine acoustic source characteristics, not only in the plane wave range but also in the high frequency range. The low frequency acoustic source characteristics were predicted by simulating the acoustic multiload measurements by using a one-dimensional process simulation code. The low frequency in-duct exhaust noise of a medium speed IC-engine can be quite accurately predicted. The high frequency source data is estimated by averaging the measured acoustic pressures with different methods; using the simple cross-spectra averaging method seems promising in this instance.

KW - Acoustic source characteristics

KW - high frequency range

KW - multi-load method

KW - medium speed engines

U2 - 10.1115/1.4006415

DO - 10.1115/1.4006415

M3 - Article

VL - 134

JO - Journal of Vibration and Acoustics

JF - Journal of Vibration and Acoustics

SN - 1048-9002

IS - 5

M1 - 051008

ER -