Journal ArticleDOI
LES analysis for auto-ignition induced abnormal combustion based on a downsized SI engine
TLDR
In this paper, a large-eddy simulation framework coupled with a detailed chemistry solver was used to quantitatively investigate engine knock and super-knock using a Large Eddy Simulation framework.About:
This article is published in Applied Energy.The article was published on 2017-04-01. It has received 40 citations till now. The article focuses on the topics: Engine knocking & Octane rating.read more
Citations
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Journal ArticleDOI
Effect of dual-spark plug arrangements on ignition and combustion processes of a gasoline rotary engine with hydrogen direct-injection enrichment
TL;DR: In this paper, a three-dimensional dynamic simulation model coupling with the chemical kinetic mechanisms was established using CONVERGE software and validated by the experimental data, and the numerical model was implemented for evaluating the influences of varying duel-spark plug locations on flow field distributions, combustion processes and major emissions formation of a gasoline rotary engine with hydrogen direct injection enrichment.
Journal ArticleDOI
Numerical simulation on combustion process of a hydrogen direct-injection stratified gasoline Wankel engine by synchronous and asynchronous ignition modes
Cheng Shi,Changwei Ji,Changwei Ji,Shuofeng Wang,Shuofeng Wang,Jinxin Yang,Xueyi Li,Yunshan Ge +7 more
TL;DR: In this paper, a three-dimensional simulation model of a gasoline Wankel engine with hydrogen direct-injection enrichment was implemented for numerical simulation, and the influence of twin-spark timing was firstly analyzed by synchronous ignition.
Journal ArticleDOI
Numerical investigations on the effects of turbulence intensity on knocking combustion in a downsized gasoline engine
TL;DR: In this article, the influence of turbulence intensity on the effect of the initial swirl ratio on the combustion process was investigated and the results showed that the enhanced turbulence intensity with increasing initial swirl ratios accelerates the spark-ignited flame (main flame) propagation, resulting in a shortage of combustion phasing and a faster flame speed.
Journal ArticleDOI
Multi-dimensional CFD Simulations of Knocking Combustion in a CFR Engine
Journal ArticleDOI
Effect of rapid combustion on engine performance and knocking characteristics under different spark strategy conditions
TL;DR: In this paper, a double-spider system was used for investigating the influence of rapid combustion on engine performance and knocking characteristics, and the results showed that under synchronous double spark ignition condition, output power and effective thermal efficiency are improved because of shortened combustion duration.
References
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Journal ArticleDOI
A Statistically-Derived Subgrid-Scale Kinetic Energy Model for the Large-Eddy Simulation of Turbulent Flows
Akira Yoshizawa,Kiyosi Horiuti +1 more
TL;DR: In this paper, a subgrid-scale (SGS) kinetic energy model for the large-eddy simulation (LES) of turbulent flows is constructed with the aid of the statistical results obtained from the two-scale direct-interaction approximation.
Proceedings ArticleDOI
Multi-Dimensional Modeling of Direct-Injection Diesel Spray Liquid Length and Flame Lift-off Length using CFD and Parallel Detailed Chemistry
Peter Kelly Senecal,Eric Pomraning,Keith Richards,T. E. Briggs,Cathy Y. Choi,R. M. McDavid,M. A. Patterson +6 more
TL;DR: In this paper, the effects of various ambient and injection parameters on the flame "lift-off" length have been investigated under typical Diesel conditions in a constant-volume combustion vessel using a modified version of the KIVA-3V engine simulation code.
Journal ArticleDOI
Gasoline engine exhaust gas recirculation – A review
TL;DR: In this paper, the influence of exhaust gas recirculation on the performance and emission of a gasoline engine was reviewed and compared with the application of EGR on GDI engines and on PFI engines.
Journal ArticleDOI
Effect of subgrid models on the computed interscale energy transfer in isotropic turbulence
TL;DR: In this paper, a priori analysis showed that the subgrid stress and the sub-grid energy flux predicted by the scale similarity model, and subgrid kinetic energy model (with fixed coefficients) correlate reasonably well with exact data, while the Smagorinsky's eddy viscosity model showed relatively poor agreement.