Thermodynamic modeling of partially stratified charge engine characteristics for hydrogen-methane blends at ultra-lean conditions

Energy, Transportation and Global Warming

“…Apart from these experimental studies, there exist many simulation works focusing mainly on the engine performance parameters (Aliramezani, et al 2013) and to some extent to the nitric oxide (NO) emissions, using the thermal NO production path (Dimopoulos et al 2007), widely known as the "three-equation Zeldovich mechanism".…”

Thermodynamic modelling of a stratified charge spark ignition engine

“…[4][5][6][7][8][9] However, some research exists into quasidimensional stratified fuel models. [10][11][12][13] For example, the stratified model developed by Aghdam 10 used a radially varying equivalence ratio. The equivalence ratio distributions were modelled by either a linear or parabolic function.…”

“…Both the effect of mixing and burned gas expansion were neglected. Aliramezani et al 13 investigated a partially stratified charge of hydrogen and methane under lean conditions. It is not clearly stated how the distribution of fuel is calculated and the effect of burned gas expansion and turbulent mixing of the stratified charge is not mentioned.…”

“…No experimental validation was provided in the works by Aghdam 10 and Sjeric et al 12 The work by Aliramezani et al 13 was validated for the indicated mean effective pressure (IMEP) and brake-specific fuel consumption (BSFC). Neither metric is indicative of how stratification changes combustion over the course of a cycle.…”

Spark-Ignition Engine Fueled with Methane-Hydrogen Blends

“…Apart from these experimental studies, there exist many simulation works focusing mainly on the engine performance parameters (Aliramezani, et al 2013) and to some extent to the nitric oxide (NO) emissions, using the thermal NO production path (Dimopoulos et al 2007), widely known as the "three-equation Zeldovich mechanism".…”