Abstract
Phenomenological models of the transient processes of diesel spray tip penetration
Highlights
Spray tip penetration (Stip) is one of the most important spray characteristics for diesel engines
Because of its simplicity and ability to clearly reflect the effects of various design parameters, the 0-D model has been widely used in model-based optimization of diesel spray combustion systems
Based on the relationship among sac pressure, needle lift and time after start of injection, the authors of this paper proposed a theoretical model for Stip at the acceleration stage and the transition stage 1 [8]
Summary
Spray tip penetration (Stip) is one of the most important spray characteristics for diesel engines. With the assumption that the diesel spray is approximated as a gas jet, Wakuri et al [1] developed a model for Stip based on the theory of momentum conservation. They found that Stip is proportion to the square root of time t 0.5. Naber and Siebers [6] modified the Wakuri model [1] by considering a turbulent two-phase jet According to their theoretical derivation, the dependence of Stip upon the time gradually transitions from t to t 0.5, which confirms the correctness of Hiroyasu's model [3]
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