Optimization of methanol powered diesel engine: A CFD approach

This present work shows a study of the effect of thermal radiation in the simulation of a turbulent, non-premixed diesel-air, hydrogen-air, kerosene-air, n-butanol, pentane-air, propane-air and methane-air used in a 2D geometry cylindrical combustion chamber. The numerical simulation based on the solution of the mass, momentum, energy and the chemical species conservation equations was performed for steady state condition using Computation Fluid Dynamic (CFD), while the turbulence modeling was considered via standard k-ε model. The results indicate that highest mass fraction of NO emissions with hydrogen-air fuel compared to diesel fuel. The results showed a better performance of kerosene-air alternative based on the emissions characteristics in the present work. The CO 2 emission reduced with hydrogen-air compared to diesel fuel due to better combustion. A significant decrease of emissions characteristics (O 2 , H 2 O and NO) was observed. The present numerical investigated results of methane-air are compared to experimental results compared to Silva et al. (2007) and Garreton and Simonin (1994) for tool validation.

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“…The dependent wall function is used to determine temperature and velocity profile near about the wall using equation as follows [14].…”

Section: Wall Functionmentioning

confidence: 99%

A numerical investigation of the species transport approach for modeling of gaseous combustion

Rajak

Nashine

Chaurasiya

et al. 2021

Journal of Thermal Engineering

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“…This has made CFD a practical adjunct to experimentation allowing consequently a deep verification and exhaustive interpretation of experimental results (Amsden & Amsden, 1993). More recently, a growing number of publications (Atmaca et al, 2016;Guo et al, 2018;Jafari et al, 2016;Li et al, 2017;Maurya & Mishra, 2017;Pandal et al, 2018;Petranović et al, 2017;Sideri et al, 2017;Silva et al, 2017;Soni & Gupta, 2016) focusing on the use of CFD codes to extensively investigate the combustion behavior of ICE have been carried out. However, a key problem for these studies dealing with numerical simulation of engine's combustion is how to adjust more accurately the CFD code.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Combustion Behavior of DI Diesel Engine with Conjunction of AMR and Embedding Refinement Strategies

Naima

Liazid²,

Bousbaa³

2021

JSAEM

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Currently, computational fluid dynamics has become an effective supplement to experimentation in the analysis and development of various engineering systems including internal combustion engines. In fact, multi-dimensional modelling of IC engines is less extensive and less time consuming than experimentation. In this aim, CONVERGE code was used to study the combustion behavior in a DI engine with various mesh control techniques including embedding and Adaptive Mesh Refinement (AMR). The simulation covers the compression, spray, combustion and expansion. A single spray plume and 1/6th of the combustion cylinder (60 degrees) is simulated. In light of the simulation results it is extremely recommended to use AMR approach in conjunction with embedding around the nozzle for running engine simulations.

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“…Various gas flow models with different 70 calculation speeds and based on different concepts have been developed. The CFD simulation can calculate the local distribution of flow velocity and analyze turbulent flow field in detail [19][20][21]. However, the CFD simulation imposes a heavy computational load and is not necessarily useful for engine control.…”

Section: Introductionmentioning

confidence: 99%

Development of On-Board In-Cylinder Gas Flow Model for Heat Loss Estimation of Diesel Engines

Ichiyanagi

Kojima

Joji

et al. 2018

International Journal of Industrial Research and Applied Engineering

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Diesel engines have been demanded to further increase the thermal efficiency through precise engine control under transient driving conditions, especially, it is essential to optimize the fuel injection timing and quantity cycle-by-cycle. Conventionally, fuel injection have been controlled by control maps, which resulted in large numbers of experiments and increase in cost. In order to overcome these problems, the present study focused on the model-based control and developed the onboard gas flow model, because the heat loss is affected by the turbulent intensity. Firstly, a validation of the CFD simulation is evaluated. The CFD simulation was used to validate the developed models and to determine unknown parameters used in the model. Secondly, modeling of in-cylinder gas flow is presented. To estimate the injection timing within 0.5 deg. against the target value, the heat loss must be estimated within the error range of 7.6%. Finally, as results, the error of heat loss obtained from gas flow model was 1.6%, and gas flow model fully met the requirement of tolerance range. From the viewpoint of calculation time, the calculation time of the model was 50.6 s per cycle, and thus the model is capable of the use of on-board applications.

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Optimization of methanol powered diesel engine: A CFD approach

Cited by 26 publications

References 42 publications

A numerical investigation of the species transport approach for modeling of gaseous combustion

A numerical investigation of the species transport approach for modeling of gaseous combustion

Numerical Simulation of Combustion Behavior of DI Diesel Engine with Conjunction of AMR and Embedding Refinement Strategies

Development of On-Board In-Cylinder Gas Flow Model for Heat Loss Estimation of Diesel Engines

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