Heat transfer in HCCI multi-zone modeling: Validation of a new wall heat flux correlation under motoring conditions

Komninos, N.P.; Kosmadakis, George

doi:10.1016/j.apenergy.2010.11.039

Cited by 27 publications

(19 citation statements)

References 54 publications

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“…These and other global heat transfer correlations have been the subject of numerous studies investigating their applicability to different combustion modes [24,[31][32][33][34][35][36][37][38][39][40][41]. Multi-mode SACI combustion, however, has yet to be the subject of an in-depth heat transfer investigation.…”

Section: Heat Transfer Model For Multi-mode Combustionmentioning

confidence: 97%

“…Such is the case with the Chang et al [24] model, where a 1/6 reduction factor on the flame enhancement term and a different temperature coefficient were proposed based on experimental heat flux studies in an HCCI engine. Other modified correlations have also been developed for HCCI combustion [24,[31][32][33].…”

Section: Heat Transfer Model For Multi-mode Combustionmentioning

confidence: 98%

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Enhanced heat release analysis for advanced multi-mode combustion engine experiments

et al. 2014

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Section: Heat Transfer Model For Multi-mode Combustionmentioning

confidence: 97%

Section: Heat Transfer Model For Multi-mode Combustionmentioning

confidence: 98%

Enhanced heat release analysis for advanced multi-mode combustion engine experiments

et al. 2014

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“…However, it is also desirable to obtain an adequate approximation of the global heat flux. This can be achieved, provided a fine zone resolution at the vicinity of the combustion chamber walls is assigned to the outer zones [30]. The latter is also essential for the investigation of the wall temperature effect on thermal stratification.…”

Section: Geometrical Features and Adjustmentsmentioning

confidence: 99%

“…The heat transfer model used in this study has been thoroughly presented in previous publications [30,31]. In the multi-zone model, heat is transferred between zones with a mechanism similar to conduction, i.e.…”

Section: Heat Transfermentioning

confidence: 99%

The effect of thermal stratification on HCCI combustion: A numerical investigation

Komninos

2015

Applied Energy

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“…An important aspect in the optimization procedure of these engine technologies, such as the HCCI combustion mode, is the study of the heat transfer through the walls of the engine [1,2,3,4,5]. This has of course a direct influence on the power and efficiency of the engine, since more heat being lost means less power being transferred to the crankshaft.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of wall heat flux calculation methods for CFD simulations of an internal combustion engine under both motored and HCCI operation

et al. 2018

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In the present work, a study of different numerical heat transfer models is presented used for Homogeneous Charge Compression Ignition (HCCI) internal combustion engine simulations. Since the heat loss through the walls of an engine is an important parameter during engine optimization, as it influences power, efficiency and emissions, accurate modeling techniques need to be available. In this work, the predictive capability of different Computational Fluid Dynamics (CFD) models has been assessed, by using data obtained from experiments on a Cooperative Fuel Research (CFR) engine, a simple single cylinder pancake engine, which has been probed with local heat flux sensors into the combustion chamber walls. The open-source software OpenFOAM R was used to perform simulations of this engine, under both motored and HCCI operation, with a specific focus on the performance of different heat flux models. Due to the simple engine geometry, more numerically demanding heat flux modeling methods could be used, maintaining an acceptable computation time. This allowed a full comparison between the equilibrium wall models as in standard use, an improved empirical heat flux correlation and a numerically intensive low Reynolds formulation. The numerical results considering all aspects of the heat flux-both its progress in time as well as quantitative aspects such as the peak heat flux or the total heat loss-have then been compared to an extensive experimental database. This allowed a full analysis of the performance of the different methods. It was found that the low Reynolds formulation described the physical behavior near the wall the best, while predicting acceptable results concerning the heat flux through the engine walls. The best heat flux prediction was however obtained with an improved empirical model, which additionally has a much shorter computation time. This is crucial when moving on to heat flux simulations of more complex production-type engines. Lastly, the equilibrium models were never capable of accurately predicting the wall heat flux.

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Heat transfer in HCCI multi-zone modeling: Validation of a new wall heat flux correlation under motoring conditions

Cited by 27 publications

References 54 publications

Enhanced heat release analysis for advanced multi-mode combustion engine experiments

Enhanced heat release analysis for advanced multi-mode combustion engine experiments

The effect of thermal stratification on HCCI combustion: A numerical investigation

Evaluation of wall heat flux calculation methods for CFD simulations of an internal combustion engine under both motored and HCCI operation

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