Wall Temperature Change and Behavior of Fuel Film after Fuel Spray Impingement on Aluminum and Quarts Glass Wall

Abstract

In this study, behavior of fuel film formed by impingement of iso-octane spray injected from a DISI injector and detailed wall temperature change of aluminum and ground quarts surface were investigated. Adhesion behavior of fuel spray and wall temperature change during and after impingement was measured under various initial wall temperature conditions (T₀ = 100°C, 130°C, and 200°C). Formation and evaporation of fuel film were observed by a high speed camera. As a result, fuel film evaporation on the aluminum surface was faster than that of the ground quarts glass surface. Wall temperature drop of the aluminum surface was higher than that of the ground quarts glass at T₀ = 200°C condition.