Numerical Study of the combustion and engine performance in the DICI engine fueled with methanol
Title: Numerical Study of the combustion and engine performance in the DICI engine fueled with methanol
SNIC Project: SNIC 2020/13-106
Project Type: SNIC Small Compute
Principal Investigator: Leilei Xu <leilei.xu@energy.lth.se>
Affiliation: Lunds universitet
Duration: 2020-11-23 – 2021-12-01
Classification: 20304
Keywords:

Abstract

CO2 is a greenhouse gas that is believed to be one of the main contributors to global warming. Recent studies show that a combination of methanol as a renewable fuel and advanced combustion concepts could be a promising future solution to alleviate this problem. However, high unburned hydrocarbon (UHC) and carbon monoxide (CO) emissions can be stated as the main drawback in low load operations when using methanol under advanced combustion concepts. This issue can be mitigated by modifying the stratification of the local equivalence ratio to achieve a favorable level. The stratifications evolved, and the regimes that can simultaneously produce low emissions, and high combustion efficiency can be identified by sweeping the injection timing from homogeneous charge compression ignition (HCCI) to partially premixed combustion (PPC). Thus, the current simulation work has been carried out to investigate the influence of injection timing on the emissions and combustion efficiency of methanol. In this project, the open CFD source, OpenFoam will be used to gain a deeper insight into the mechanisms of pollutant emissions and engine performance during the transition from HCCI to PPC in a methanol DICI engine. The numerical simulation was conducted to provide detailed information about the multi-scale physical and chemical process during combustion regime transition. Systematic investigation of these is important for the development of control strategies to improve engine performance and decrease the CO2 and other emissions. In this project, the open CFD source, OpenFoam will be used to gain a deeper insight into the mechanisms of pollutant emissions and engine performance during the transition from HCCI to PPC in a methanol DICI engine. The numerical simulation was conducted to provide detailed information about the multi-scale physical and chemical process during combustion regime transition.