Evaporating and non-evaporating diesel spray simulation: comparison between the ETAB and wave breakup model
by Gianmarco Pizza, Yuri Martin Wright, German Weisser, Konstantinos Boulouchos
International Journal of Vehicle Design (IJVD), Vol. 45, No. 1/2, 2007

Abstract: Evaporating and non-evaporating diesel sprays have been simulated using the Enhanced Taylor Analogy Breakup (ETAB) and the wave atomisation and breakup models implemented in STAR-CD and compared with experiments. The model validation was carried out by means of experimental data of sprays under controlled conditions in a constant-volume bomb. The model constants were calibrated for a specific test case – low injection pressure, non-evaporating conditions and a small nozzle diameter – and subsequently their robustness with respect to changes in boundary conditions was assessed for different injection pressures, evaporating conditions and larger nozzle diameters. The results suggest that, for suitable mesh resolutions with calibrated model constants, excellent agreement with experimental data can be achieved with both models. With these calibrated model parameters held constant, accurate predictions for spray penetrations, droplet diameters and spray angles could be obtained also for different injection configurations and air conditions by both models.

Online publication date: Fri, 11-May-2007

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