An Improved Soot Formation Model for 3D Diesel Engine Simulations

Abstract

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Towards a detailed soot model for internal combustion engines

“…We also found that while the dominant contribution to the CPU-time spent overall still stems from solving the chemical kinetic equations, solving the population balance can reach about the same computational cost. Experimental results of this study, as well as findings in the literature [14], suggest that aggregates recirculated in exhaust gases play an important role, as described in more detail below, which we substantiated by preliminary simulations. For this reason, we decided to conduct all our simulations over ten consecutive cycles, starting with trapped residuals with typical gas-phase composition, but not containing any soot.…”

“…More recently, the focus has still remained on phenomenology and on using descriptions based on only a small number of quantities, although improvements have been made [14][15][16]. In [17], three empirical soot models of varying complexity implemented in KIVA are reviewed and compared.…”

Nine-step phenomenological diesel soot model validated over a wide range of engine conditions

“…Moreover, the models are obviously advantageous because they include particle dynamics, being able to predict the sizes and the number density of soot particles formed in engines. Given the speculation that the forthcoming emissions regulation will soon impose a measure on the number and size of tailpipe PMs, the MSP modeling approach continues to receive renewed attention (e.g., [9]). …”

Numerical simulation of biodiesel fuel combustion and emission characteristics in a direct injection diesel engine

“…Furthermore, the numerical studies on the pollutants formation prediction have been performed in order to improve the predictive capability of models for engine simulations. Boulanger et al [29,30] have developed an improved phenomenological soot model for 3D multi-dimensional engine simulations. Guo et al [31] have analyzed the interaction between soot and NO x formation, and the results show that the influence of soot on NO formation is caused by not only the radiationinduced thermal effect, but also the reaction-induced chemical effect.…”