Behavior of Diesel Spray Impingement on an Extruded Column 18ICES/071
Authors
Yoshihiro Hayashi - Gunma University
Chihiro Wakabayashi - Denso Co.
Tomohiko Furuhata - Gunma University
Masataka Arai - Gunma University
Abstract
Behavior of diesel spray impinged on an extruded surface, which was a top of cylindrical column, was observed using a high-speed drum camera. A spray volume and a spray surface area were estimated from the photographs. Fuel mass in the spray was calculated from injected fuel and adhering fuel on the wall. Rapid growth of spray volume and surface were caused by the interaction between spray tip and surroundings when the spray tip overran from the edge of extruded column. Air-fuel ratio in spray was estimated from spray volume and fuel mass in the spray. From the measured results, it was clear that the optimum diameter of extruded column was 45mm, because the air-fuel ratio in spray was larger than these in the other columns.