RT info:eu-repo/semantics/article
T1 Prediction of the flame kernel growth rate in spark ignition engine fueled with natural gas, hydrogen and mixtures
A1 Giménez Olavarría, Blanca
A1 Melgar Bachiller, Andrés
A1 Horrillo Güemes, Alfonso Jesús
A1 Gabana Molina, Pedro
K1 Homogeneous combustion
K1 Combustión homogénea
K1 Natural gas-hydrogen
K1 Gas natural - hidrógeno
K1 Flame kernel growth
K1 Crecimiento del núcleo de llama
AB The knowledge of combustion duration is a key tool in the development of engines, specially nowadays for engines adapted to new fuels with low C/H ratio such as natural gas and hydrogen. This work is aimed to develop a correlation that predicts the duration of the first phase of combustion until the process becomes turbulent in a SI engine. The flame kernel radius when this transition occurs, , is the study variable.To determine this variable from the experimental pressure records, a flame kernel growth predictive model is used. The predictive model is adjusted to the experimental data, determining the most appropriate  value.The pressure records of 500 consecutive cycles of 48 test points have been processed. The averaged values of  of each test point have been correlated with the characteristic parameters of the process: turbulence and properties of the fuel–air mixtures. Finally,  and integral length scale ratio is correlated with Damköhler number.A wide range of operating conditions have been studied, reaching the novel conclusion that it is possible to analyze the kernel growth phenomenon from a spatial point of view rather than from a temporal point of view, as had been studied in many previous works.The developed correlation can be used in combustion predictive modeling to support SI engine design. Other practical conclusion from the work, that can be used in SI engine development, is that decreasing the integral length scale reduces the time of the first phase of combustion.
PB Elsevier
SN 0016-2361
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/57981
UL https://uvadoc.uva.es/handle/10324/57981
LA eng
NO Fuel, 2022, vol. 339, 126908
NO Producción Científica
DS UVaDOC
RD 12-jul-2024