Simulation of quasi-dimensional combustion model for predicting diesel engine performance

Qi, Kunpeng; Feng, Liyan; Leng, Xianyin; Du, Baoguo; Long, Wuqiang

doi:10.1016/j.apm.2010.07.047

Cited by 37 publications

(16 citation statements)

References 13 publications

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“…It is assumed that the state inside the system is uniform. This quasi-dimensional modeling method has been widely used for modeling IC engines [26][27][28]. If the thermodynamic states inside the system are uniform, then diffusion or convection does not occur inside the system.…”

Section: Uniformly Distributed Thermodynamic Statementioning

confidence: 99%

Analytical Approach to the Exergy Destruction and the Simple Expansion Work Potential in the Constant Internal Energy and Volume Combustion Process

Song

2020

Energies

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The exergy destruction due to the irreversibility of the combustion process has been regarded as one of the key losses of an internal combustion engine. However, there has been little discussion on the direct relationship between the exergy destruction and the work output potential of an engine. In this study, an analytical approach is applied to discuss the relationship between the exergy destruction and efficiency by assuming a simple thermodynamic system simulating an internal combustion engine operation. In this simplified configuration, the exergy destruction during the combustion process is mainly affected by the temperature, which supports well-known facts in the literature. However, regardless of this exergy destruction, the work potential in this simple engine architecture is mainly affected by the pressure during the combustion process. In other words, if these pressure conditions are the same, increasing the system temperature to reduce the exergy destruction does not lead to an increase in the expansion work; rather, it only results in an increase in the remaining exergy after expansion. In a typical internal combustion engine, temperatures before combustion timing must be increased to reduce the exergy destruction, but increasing pressure before combustion timing is a key strategy to increase efficiency.

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Section: Uniformly Distributed Thermodynamic Statementioning

confidence: 99%

Analytical Approach to the Exergy Destruction and the Simple Expansion Work Potential in the Constant Internal Energy and Volume Combustion Process

Song

2020

Energies

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“…The value of ξχ g may be larger than the value of χ g at the beginning of the scavenging process. It's impracticable, so a certain limitation should be exerted on Equation (11), as shown in Equation (12).…”

Section: Gas Exchanging Processmentioning

confidence: 99%

“…In fact, it needs more than 100 times the real running time even for solving a 1-dimensional model [11]. Moreover, the multi zone thermodynamic model usually requires more than real time [12]. Although there were several papers that show real time multi zone combustion models [2,13], these models cannot be used in real time simulation.…”

Section: Introductionmentioning

confidence: 99%

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A Zero-Dimensional Mixing Controlled Combustion Model for Real Time Performance Simulation of Marine Two-Stroke Diesel Engines

et al. 2019

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The paper presents a performance prediction model of marine low-speed two-stroke diesel engines based on an advanced MCC (mixture controlled combustion) model coupled with a fuel injection model. Considering the time of real calculation, the so-called “concentrated exhausting gas” scavenging model and the working process model are used in the present work, and improved by introducing the ratio of pure combustion product over the total gas mass in the cylinder as an expression of the working medium components. The reaction rate model in the zero-dimensional MCC model is improved by introducing the fraction of combustion product in the fuel spray, and the relationship between the combustion model and scavenging quality is established. Meanwhile, the combustion model was simplified in the diffusion combustion phases and integrated with the fuel injection model in order to respond to the change of injection profile and injection timing. A large-scale low-speed marine diesel engine was used for a simulation. The results of the whole model are consistent with experimental data and the speed of calculation is fast enough for real time simulation of low speed and medium speed diesel engines. The prediction model can be used in the design and calibration of the electronic control system and performance optimization of the marine two-stroke diesel engine.

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“…The quasi-dimensional model for diesel engine working process in this research is divided into six sub-models, namely compression sub-model, combustion sub-model, expansion sub-model, exhaust sub-model, inlet and outlet valve overlap sub-model and intake sub-model [3][4]. The simulation results, which include instantaneous data such as pressure, temperature, mass and performance parameters are obtained by solving the energy conservation equations, the mass conservation equations and the ideal gas state equations.…”

Section: Modeling Of Quasi-dimensional Model For Diesel Engine Womentioning

confidence: 99%

Modelling and Simulation of Air Entrainment Period Effect on Prediction of Quasi-dimensional Model for Diesel Engine

Qi¹,

Long²,

Guo³

2017

Proceedings of the 2017 International Conference on Applied Mathematics, Modelling and Statistics Application (AMMSA 2017)

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Abstract-In order to improve the precision of quasi-dimensional model for predicting diesel engine performance, three kinds of air entrainment period in quasi-dimensional model for diesel engine working process is developed in this research. The software MATLAB/Simulink is utilized to build the quasi-dimensional model for diesel engine and different kinds of air entrainment period effect on the performance prediction of diesel engine are simulated. The simulation results show that the relative errors of diesel engine performance between three methods are obvious different at rated working condition. It can be concluded that the proper method to calculate air entrainment period must be selected to improve performance prediction precision of simulation model.

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Simulation of quasi-dimensional combustion model for predicting diesel engine performance

Cited by 37 publications

References 13 publications

Analytical Approach to the Exergy Destruction and the Simple Expansion Work Potential in the Constant Internal Energy and Volume Combustion Process

Analytical Approach to the Exergy Destruction and the Simple Expansion Work Potential in the Constant Internal Energy and Volume Combustion Process

A Zero-Dimensional Mixing Controlled Combustion Model for Real Time Performance Simulation of Marine Two-Stroke Diesel Engines

Modelling and Simulation of Air Entrainment Period Effect on Prediction of Quasi-dimensional Model for Diesel Engine

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