Measurement of Droplet Size Distribution of Diesel Fuel Spray near Nozzle Orifice by Advanced Laser 2-Focus Velocimeter 18ICES/069
Authors
Hironobu Ueki - Nagasaki University
Masahiro Ishida - Nagasaki University
Daisaku Sakaguchi - Nagasaki University
Abstract
An advanced laser 2-focus velocimeter (L2F) was used for the local and instantaneous measurement of droplet size in diesel fuel spray near nozzle orifice. Diesel fuel was injected into the atmosphere intermittently from a single-hole nozzle with a hole diameter of 0.2 mm. Measurement was conducted at a position of 1.5 mm downstream from the nozzle exit. The droplet size increased with needle valve opening and varied a little after the needle valve was opened fully. It is shown that the droplet size distribution near nozzle orifice can be fitted to the Nukiyama-Tanasawa's distribution in most injection period.