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A study of knock and adiabatic process in multi-fuel engines
Laboratory of Acoustics, Department of Applied Physics, University of Valencia.
Laboratory of Acoustics, Department of Applied Physics, University of Valencia.
Laboratory of Acoustics, Department of Applied Physics, University of Valencia.
Luleå tekniska universitet.
2000 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 108, no 5, 2594-2595 p.Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

For both engine designers and control purposes, a better understanding of the knocking that occurs during combustion in engines can lead to optimal decisions which will make engines operate more efficiently. The rapid rise in diesel engines is recognized as an audible impulse noise, which is known as ``knock.'' The knock is caused by the spontaneous combustion of a significant volume of fuel/air mixture. The knock produces shock waves within the combustion chamber and results in a great number of combustion chamber resonance frequencies. The engine used in the experiments was a six-cylinder modified diesel engine running in ethanol conditions. The main purpose of this research is to determine the knock phenomena and the adiabatic process. To perform the data analysis a time-frequency spectral approach was used. The results revealed both radial and circumferential resonances. The most important adiabatic coefficients were carried out and used to calculate the heat release rate.

Place, publisher, year, edition, pages
2000. Vol. 108, no 5, 2594-2595 p.
Research subject
Engineering Acoustics
Identifiers
URN: urn:nbn:se:ltu:diva-38742Local ID: d39b9dd0-4543-11de-a42f-000ea68e967bOAI: oai:DiVA.org:ltu-38742DiVA: diva2:1012243
Conference
Joint 140th Meeting ASA/NOISE-CON 2000 : 03/12/2000 - 08/12/2000
Note
Godkänd; 2000; 20090520 (andbra)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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