Helmholtz Tuned Induction System for Turbocharged Diesel Engine

Brands, M. C.

doi:10.4271/790069

Cited by 14 publications

(2 citation statements)

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“…A HR reduces the response of the acoustic cavities in the acoustic domain [12,13]. The natural frequency of the resonators depends on the neck length, cavity volume and neck area [14].…”

Section: Introductionmentioning

confidence: 99%

Effects of variable-volume Helmholtz resonator on air mass flow rate of intake manifold

Hanriot

Queiroz

Maia

2019

J Braz. Soc. Mech. Sci. Eng.

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The application of geometric modifications to the intake manifold to improve engine breathing provides positive results using different strategies. Helmholtz resonators (HR) are one of the most basic acoustic models and are widely used in engineering applications. Most of the works presented in the literature focus on the use of HR in the fields of acoustics. The present work experimentally investigates pulsating flow characteristics of the engine intake manifold and the effects of a Helmholtz resonator with variable internal volume. In this paper, acoustic studies were used to model the intake manifold and to develop a complex expression to determine the natural frequency of the system. The model included the primary and secondary intake pipes and the resonator. Experiments were conducted on a straight intake pipe connected to an engine cylinder head mounted on a test flow bench, especially designed for fluid dynamic studies of engine intake systems with unsteady flow conditions. Using electronic controls, the internal volume of the resonator was varied and adjusted according to the frequency of the valves as well as the natural frequency of the intake manifold. The natural frequency of the system was determined from a numerical model of the intake manifold. The results showed the internal volume of the resonator and frequency tuning affect the intake air mass flow rate at a wide range of camshaft velocities. For a fixed volume, the average increase of the mass flow rate was 17.8%, and when the volume was adjusted according to valve frequency, the average increase was 24.7%. The highest intake air mass flow rate was increased 31.5% when the resonator was tuned to the frequency of the system.

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“…A HR reduces the response of the acoustic cavities in the acoustic domain [12,13]. The natural frequency of the resonators depends on the neck length, cavity volume and neck area [14].…”

Section: Introductionmentioning

confidence: 99%

Effects of variable-volume Helmholtz resonator on air mass flow rate of intake manifold

Hanriot

Queiroz

Maia

2019

J Braz. Soc. Mech. Sci. Eng.

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“…The majority of analysis of inlet manifold flow to date has been done either experimentally or via theoretical investigations such as 'organ pipe' theory [1], Helmholtz resonator theory [2,3], and ram charging theory [4]. Tabaczynski [5] and Winterbone et al [6] have published reviews of these processes.…”

Section: Introductionmentioning

confidence: 99%

Computational Analysis of Flow Dynamics in a Four-Stroke Internal Combustion Engine

Gao

Blunt

Simpson

2014

AMR

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This paper presents a predictive investigation using CFD techniques focusing on the tradeoff between steady-state airflow considerations and unsteady transient pressure wave tuning of a single cylinder IC engine. An axisymmetric CFD model has been developed to initially examine the steady-state flow characteristics generated by different inlet entry radii. This has then been further developed to incorporate the unsteady, transient pressure wave effects caused by the motion of inlet valve and piston. Detailed simulation results, which are validated against experimental data provided by Group Lotus plc, are reported here and quantitative conclusions are drawn for maximising airflow in future inlet manifold design.

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The Application of Wave Action Techniques to Reciprocating Engines

Winterbone¹

1990

Internal Combustion Engineering: Science &Amp; Technology

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Helmholtz Tuned Induction System for Turbocharged Diesel Engine

Cited by 14 publications

References 0 publications

Effects of variable-volume Helmholtz resonator on air mass flow rate of intake manifold

Effects of variable-volume Helmholtz resonator on air mass flow rate of intake manifold

Computational Analysis of Flow Dynamics in a Four-Stroke Internal Combustion Engine

The Application of Wave Action Techniques to Reciprocating Engines

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