A Comprehensive Digital Computer Program to Simulate a Compression Ignition Engine Including Intake and Exhaust Systems

A simulation study on the effect of hydrogen addition as supplementary fuel to gasoline at lean mixture (equivalence ratio  = 0.8) was carried out in order to reduce the gasoline fuel consumption and harmful emissions. The effect on the first law, emissions, and second law parameters was investigated. This was done by changing the mixture ratio between gasoline and the supplementary fuels to achieve the required equivalence ratio. The first part (first law and emission performance) was conducted for all engine speeds. The second part (second law analysis) was done at the rated speed of 2750 rpm. The simulation study was performed using the date for (Ricardo E6/T variable compression ratio engine), which was used for model verification. The study showed that at lean mixture, hydrogen addition reduced carbon monoxide and nitrogen oxides levels. Hydrogen addition significantly improved the heat release rate; however, due to its fast burning speed, the heat released was close to the top dead centre compared with gasoline. From second law analysis, hydrogen addition caused a slight drop in the work availability, increased availability loss with heat, and an increase in the area under temperature entropy diagram.

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“…A comprehensive discussion on the formulations of the second law analysis of engine combustion can be found in [30][31][32][33][34].…”

Section: Theoretical Analysismentioning

confidence: 99%

Second Law Analysis of Gasoline Powered SI Engines with Hydrogen Injection

2021

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“…Numerical studies of pressure wave propagation through engine manifolds have been made onedimensionally and, in most applications, by using the method of characteristics 13 or the mass-spring analogy. 14 The application of finite volume methods can be found to focus the flow through throttle valves in order to generate input data for simplified models, 15 or even the in-cylinder flow where a pressure-based method is widely used, the first developments of which have been presented by Harlow and Welch, 16 Raithby and Schneider 17 and Patankar.…”

Section: And the Book By Winterbone And Pearsonmentioning

confidence: 99%

Numerical study of an internal combustion engine intake process using a low Mach number preconditioned density-based method with experimental comparison

Falcão

Soriano

Rech

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part D:

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When air flows unsteadily in an internal combustion engine through its inlet pipe, chambers and valves, some effects such as friction and inertial forces have direct influence on the volumetric efficiency of the system. The work in this paper aims to investigate numerically and experimentally the pulsating phenomena present in an intake pipe of an internal combustion engine and to discuss the intake jet flow predictions through the novel implementation of a low Mach number preconditioned density-based method, including the three-dimensional modelling of the inlet valve, the inlet pipe and the pulsating effects. The inlet valve movement promotes moderate values of Mach numbers during its opening phase. After the inlet valve closes, the flow is abruptly restricted and a series of pressure waves propagate through the fluid at low Mach numbers. Although the low Mach number preconditioned density-based method is very attractive in this case, the study of the pulsating flow in the internal combustion engine intake systems has not been performed using this method, probably owing to robustness issues and simulation effort. The pressure-based methodology is widely used and, generally, the inlet pipe and pulsating effects are not included in the threedimensional fluid dynamics simulation. In order to verify the accuracy of the numerical solution, the results are compared with experimental data collected from a bench constructed specifically for this purpose. The numerical results were satisfactory for the amplitudes and the resonance frequencies in the air intake system. Also, different aspects of the jet flow inside the cylinder are shown and discussed.

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“…The graphical method used a variable grid width, and was able to accommodate discontinuities at arbitrary locations. Benson and his colleagues published many papers on computer modeling of engines (4)(5)(6)(7)(8), and a two-volume text (9-10).…”

Section: Chapter 2 Literature Reviewmentioning

confidence: 99%

Simulation of internal combustion engine cylinder interactions

Boehne¹

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A Comprehensive Digital Computer Program to Simulate a Compression Ignition Engine Including Intake and Exhaust Systems

Cited by 35 publications

References 22 publications

Second Law Analysis of Gasoline Powered SI Engines with Hydrogen Injection

Second Law Analysis of Gasoline Powered SI Engines with Hydrogen Injection

Numerical study of an internal combustion engine intake process using a low Mach number preconditioned density-based method with experimental comparison

Simulation of internal combustion engine cylinder interactions

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