Quantitative Analysis of Splashing Lubricating Oil by Impingement of Spray Droplets on Lubricating Oil Film in Diesel Engine

- Measurement of the Mass Fraction of Lubricating Oil Contained in the Secondary Droplet After Impingement -

Abstract

The purpose of this study is to estimate the amount of splashing lubricating oil by secondary droplets from a single oil crown. Therefore, the secondary droplet diameter and the number of secondary droplets were estimated from the model formulation. Moreover, the mass fraction of lubricating oil contained in the secondary droplets was measured by the laserinduced fluorescence method. As a result, it was found that the amount of splashing lubricating oil increased with the increase of K-factor, which is a non-dimensional number using Weber and Laplace numbers.