Numerical simulation of combustion progress on dual fuel engines with different turbulence models
Abstract
In order to get a more accurate turbulence model, three turbulence models had been adopted to simulate combustion progress on dual fuel (DF) engines. Compared with experimental data, the precision of each model to simulate combustion progress on DF engines was investigated. It is shown that the mean pressure in cylinder computed by each model is different. The peak pressure in cylinder is the largest by using PANS model and has better agreement with experimental data, only 0.93% smaller than the experimental data. NOx emission calculation is more accurate by using k-ε model. Compared with experimental data, the calculation deviation of O2 and CO2 emission by using three turbulence models does not exceed 2%. The k-ζ-f model at COemission calculation is better agreement with experimental data when the engine is in a low load. However, when the engine is in the high load, the PANS model at COemission calculation is better agreement with experimental data.References
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