Modeling spark-plug discharge in humid air
Source abstract
Abstract
Detailed knowledge of the species involved in the oxidation steps during combustion is of interest for technological applications. Using a formerly developed numerical model for a spark-plug discharge in dry air at atmospheric pressure, we studied here the influence of air humidity in the evolution of the densities of neutral and charged species and the gas temperature. The reduced electric field, electronic density, and temperature previously obtained from experimental measurements are parametrically introduced in the model. The effect of relative humidity with the values of 25%, 50%, 75%, and 100% is studied considering the water–air mixture formed by 63 species and coupled by 738 physical and chemical processes. The source term of the chemical reactions is calculated with the ZDPlaskin tool coupled to the numerical model. The analysis of the predominant pathways in the production and consumption of selected species is also carried out. Highly reactive species originated from the inclusion of water in the plasmochemical cycle reach relatively large density values and might play a significant role when considering an air–fuel mixture.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Plasma Applications and Diagnostics · Electrohydrodynamics and Fluid Dynamics · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Federal University of Juiz de Fora 1 , Juiz de Fora, Brazil
Civil Engineering Department, Federal University of Rio de Janeiro 2 , Rio de Janeiro, Brazil
Funding
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior · Conselho Nacional de Desenvolvimento Científico e Tecnológico
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