Modelling the Origins of Combustion Noise in the Indirect Injection Diesel Engine

Blunsdon, C.A.; Dent, J. C.; Das, Sudhakar

doi:10.4271/952432

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…Hence, some kind of pre‐design must take place before a definitive geometry is adopted and tested in an experimental bench. This is usually done with modelling, as is described for instance in Blunsdon et al (1995). In this work, they simulate the combustion and calculate the overall noise level, but they do not take into account the effect of the combustion chamber resonance.…”

Section: Introductionmentioning

confidence: 99%

Computational study of the sensitivity to ignition characteristics of the resonance in DI diesel engine combustion chambers

Broatch

Margot

Gil

et al. 2007

Engineering Computations

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PurposeThe purpose of this computational fluid dynamics (CFD) study is to give insight about the influence of the piston bowl geometry and the fuel ignition features on the resonance of direct injection diesel engines combustion chambers in order to provide support to the experimental findings on combustion noise.Design/methodology/approachThe resonance due to the burned gases oscillations in a diesel combustion chamber is caused by the sudden rise in pressure due to the initial ignition of the air‐fuel mixture, and leads to the resonance noise. In the CFD study presented here the excitation source is represented by imposing locally in a small area (excitation zone) the pressure and temperature gradients of the start of combustion. The CFD approach is first validated against the acoustic modal theory. A parametric study representing different ignition conditions is then performed with a real bowl geometry.FindingsThe solutions obtained are analysed in terms of the energy of resonance (ER) and the response in the frequency domain. It was found that the response in frequency only varies with the diameter of the bowl, while the ER varies significantly in function of the injection conditions.Research limitations/implicationsThese first conclusions need to be verified on the one hand by taking into account the piston motion, and, on the other hand, by modelling in a more realistic way the combustion excitation.Practical implicationsThis CFD study has brought some insight into the flow phenomena that affect the resonance modes of a combustion chamber.Originality/valueThis CFD study uses a novel methodology to model the effect of the combustion excitation on the resonance modes of a combustion chamber.

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Section: Introductionmentioning

confidence: 99%

Computational study of the sensitivity to ignition characteristics of the resonance in DI diesel engine combustion chambers

Broatch

Margot

Gil

et al. 2007

Engineering Computations

View full text Add to dashboard Cite

show abstract

“…Among these, combustion noise is the major noise of internal combustion engine [5]. It is considered in all past researches that controlling the pressure rise rate ϕ d dP (PRR) is an effective method to control combustion noise [2,3,4,6]. For example, the high pressure common rail fuel injection system can realize several pre-injection more than one time and led to the PRR is smaller, it not only decrease harmful emission and also decrease combustion noise evidently [2].…”

Section: Introductionmentioning

confidence: 99%

The Experiment Research on Related Factors of Influencing Combustion Noise of Diesel Engine

Yuan

Fang

Zhao

2011

AMR

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The noise of Diesel engine is the main source of vehicle noise, and engine noise is divided to 3 parts: the mechanical noise, the air flow noise and combustion noise. Combustion noise is the main part of in the three. In this paper, the combustion noise variation of a vehicle diesel with parameters of engine speed, engine load, pump and injector were analyzed by experiment method, the relationship between combustion noise and the double-peak of cylinder presser rise rate were analyzed carefully, some conclusions such as the second peak of PRR(pressure rise rate) is the suitable factor reflecting combustion noise and combustion noise is the function of diesel load were gotten.

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Sources of Noise in Diesel Engines

2017

Liquid Piston Engines

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Modelling the Origins of Combustion Noise in the Indirect Injection Diesel Engine

Cited by 4 publications

References 12 publications

Computational study of the sensitivity to ignition characteristics of the resonance in DI diesel engine combustion chambers

Computational study of the sensitivity to ignition characteristics of the resonance in DI diesel engine combustion chambers

The Experiment Research on Related Factors of Influencing Combustion Noise of Diesel Engine

Sources of Noise in Diesel Engines

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