Study of Intake System Wave Dynamics and Acoustics by Simulation and Experiment

Silvestri, John; Morel, Thomas; Costello, Michael T.

doi:10.4271/940206

Cited by 32 publications

(9 citation statements)

References 1 publication

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“…They now adopt numerical techniques based on the MacCormack (MAC) and two step Lax-Wendroff (LW2) shock-capturing, ®nite difference schemes and more recently the discontinuous ®nite element Galerkin method [11], yielding more realistic results than the mesh method of characteristics (MOC). They have proved most successful in predicting the in¯uence of intake/exhaust system tuning [3,12] on engine breathing and performance. They are apparently signi®cantly less successful in calculating valid predictions of intake [12] or tailpipe ori®ce [3] noise emissions above 200 Hz, or the second harmonic of the ®ring frequency (3rd order), as illustrated in Figure 3, adapted from reference [3].…”

Section: Non-linear Wave Propagation Algorithmsmentioning

confidence: 99%

“…They have proved most successful in predicting the in¯uence of intake/exhaust system tuning [3,12] on engine breathing and performance. They are apparently signi®cantly less successful in calculating valid predictions of intake [12] or tailpipe ori®ce [3] noise emissions above 200 Hz, or the second harmonic of the ®ring frequency (3rd order), as illustrated in Figure 3, adapted from reference [3].…”

Section: Non-linear Wave Propagation Algorithmsmentioning

confidence: 99%

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I.C. Engine Intake and Exhaust Noise Assessment

Davies

Holland

1999

Journal of Sound and Vibration

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Section: Non-linear Wave Propagation Algorithmsmentioning

confidence: 99%

Section: Non-linear Wave Propagation Algorithmsmentioning

confidence: 99%

I.C. Engine Intake and Exhaust Noise Assessment

Davies

Holland

1999

Journal of Sound and Vibration

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“…This study utilizes a 1-D engine simulation software which is a reliable means to test the varying intake and exhaust systems of an engine. Due to cost effectiveness, simplicity, and capability to adjust countless engine properties, engine simulation software has been frequently used in recent studies [19,[32][33][34]. This particular study utilizes Ricardo WAVE which is an ISO approved commercially accepted one dimensional (1-D) engine simulation software.…”

Section: Modellingmentioning

confidence: 99%

“…This particular study utilizes Ricardo WAVE which is an ISO approved commercially accepted one dimensional (1-D) engine simulation software. As mentioned by Benajes [13], Winterbone and Yoshitomi [34], Silvestri et al [33], Ohata et al [35], Deshmukh et al [19] and Claywell et al [32], one dimensional wave models like Ricardo Wave are suitable and effective means to gather data concerning engine intake and exhaust systems.…”

Section: Modellingmentioning

confidence: 99%

Exhaust Tuning of an Internal Combustion Engine by the Combined Effects of Variable Exhaust Pipe Diameter and an Exhaust Valve Timing System

2018

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Changes to engine geometry and specifications can produce better torque, power, volumetric efficiency and more. The technique known as wave tuning can lead to better engine torque and power. This paper focuses on increasing the engine torque by improving the exhaust fluid flow through the exhaust manifold. Phasing and intensity of the pressure waves in the exhaust manifold have significant effects on scavenging, valve overlapping and pumping losses. In this research, individual and combined effects of variable exhaust runner diameter and exhaust valve timing on the fluid flow from exhaust of the engine are studied using computer simulation. An engine simulation software, Ricardo Wave, is utilized in this research. The analysis is conducted on a 1-D model of a KTM 510 cc single cylinder, four-stroke Sl engine. The data gathered shows that varying only the exhaust pipe diameter continuously with speed yields an average of 4.23% improvement in torque from the original engine model. However, due to practical constraints, the diameter is limited to vary in three steps (36 mm, 45 mm and 60 mm). This has reduced the average improvement of torque to 3.78%. Varying the valve timing alone gains an average of 1.94% improvement in torque. Varying both the exhaust pipe diameter in three steps and the exhaust valve timing yields an average of 4.69% improvement in torque. This average is conducted over the engine speed ranges from 2000 to 11,000 rpm.

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“…Certain components, however, such as the intake and exhaust manifolds, exhibit a high degree of geometric complexity, which cannot be accurately modelled by 1D codes, unless equivalent 1D models are adopted. The need of achieving good accuracy, along with acceptable computational runtime, has given the spur to the development of simplified geometry based tools, such as quasi-3D and 1D-3D approaches [10,11,12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Fluid Dynamic and Acoustic Optimization Methodology of a Motorbike Intake Airbox Using Multilevel Numerical CFD Models and Experimental Validation Tests

Montenegro¹,

Torre²,

Cerri³

et al. 2013

SAE Int. J. Engines

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In this work a multilevel CFD analysis have been applied for the design of an intake air-box with improved characteristics of noise reduction and fluid dynamic response. The approaches developed and applied for the optimization process range from the 1D to fully 3D CFD simulation, exploring hybrid approaches based on the integration of a 1D model with quasi-3D and 3D tools. In particular, the quasi-3D strategy is exploited to investigate several configurations, tailoring the best trade-off between noise abatement at frequencies below 1000 Hz and optimization of engine performances.Once the best configuration has been defined, the 1D-3D approach has been adopted to confirm the prediction carried out by means of the simplified approach, studying also the impact of the new configuration on the engine performances. The calculations have been further validated by an extensive experimental campaign carried out not only on the test bench for engine performance analysis but also on an acoustic test bench developed by the University of Florence. The experimental acoustic characterization is based on the Multi-Microphone Technique, which guarantees a wider reliable frequency range of analysis and lower errors in the evaluation of the acoustic properties of the examined devices (such as mufflers or intake lines, etc.).Results of the calculations on both the baseline and optimized configurations have been compared to the measured acoustic performance carried with null flow conditions showing an encouraging agreement.

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Study of Intake System Wave Dynamics and Acoustics by Simulation and Experiment

Cited by 32 publications

References 1 publication

I.C. Engine Intake and Exhaust Noise Assessment

I.C. Engine Intake and Exhaust Noise Assessment

Exhaust Tuning of an Internal Combustion Engine by the Combined Effects of Variable Exhaust Pipe Diameter and an Exhaust Valve Timing System

Fluid Dynamic and Acoustic Optimization Methodology of a Motorbike Intake Airbox Using Multilevel Numerical CFD Models and Experimental Validation Tests

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