In this paper, the effect of pre-injection timing on combustion and emission performance methanol/diesel high premixed charge compression ignition (HPCCI) mode at low load was studied by three-dimensional numerical simulation. The simulation is carried out under conditions 1900 r/min 25% load, diesel mass remains constant changed 50% 60% methanol ratio respectively. results show that with delay...

Lean fuel/air mixtures with various fuel/fuel ratios between methane and n-butane were supplied to a premixed compression-ignition engine (i.e. homogeneous charge compression ignition engine, HCCI) with or without supplementary gaseous formaldehyde induction as an ignition controlling additive. In the no additive case the methane and butane function as the two fuels in the high/low-octane two-f...

Here, a large-eddy simulation and finite-rate chemistry solver (see Kahila et al. Combustion Flame, 2019) is utilized to investigate diesel spray assisted ignition of lean methane-air mixture. A compression heating model emulate the ambient temperature pressure increase in (CI) system. The key parameter start injection (SOI) relative virtual top dead center (TDC), where peak adiabatic pressure/...

Premixed or partially premixed compression ignition modes, such as homogeneous charge compression ignition (HCCI), have been a particular focus among researchers because of their potential to deliver enhanced fuel efficiency and meet exhaust emissions mandates without the addition of costly after-treatment technologies as currently required with traditional spark ignition (SI) and direct inject...

Focusing on community colleges in distressed rural areas of the United States, the Ford Foundation’s Rural Community College Initiative (RCCI) aims to help targeted community colleges expand their capacity to increase access to postsecondary education and to foster regional economic development. RCCI is geared to specific geographic regions where communities face out-migration and stagnant or d...

Many researchers believe multi-zone (MZ), chemical kinetics–based models are proven, essential toolchains for development of low-temperature combustion (LTC) engines. However, such specific to the research groups that developed them and not widely available on a commercial nor open-source basis. Consequently, their governing assumptions vary, resulting in differences autonomy, accuracy simulati...

Re-ignition and re-initiation mechanisms of quenched detonation waves passing over a backward facing step are investigated using a high-resolution discontinuous Galerkin method, in which the reaction chemistry is described using a detailed chemical model. A stoichiometric Hydrogen/Oxygen mixture with different diluents (Argon and Nitrogen) is considered to assess effects of the mixture composit...