May 16 2017 12:00 PM
May 16 2017 01:00 PM
Join us at 12:00 PM for the CCRC lunchtime seminar on "Spray characterization of a hollow cone injector used in gasoline direct injection (GDI) engine" by Jianguo Du.
The transient spray from a piezo-electric outwardly opening hollow cone injector was analyzed in a
constant pressure chamber via the 2D phase Doppler anemometry (PDA) technique. Measurements
were performed at non-reacting conditions at pressure and temperature suitable for gasoline direct
injection (GDI) engines. Injection duration time was set to 1.3 ms and two different fuels, namely
Haltermann straight run naphtha (HSRN) and J-24 light naphtha (LN), were used. Effects of gas
pressure and temperature on spray development were studied for HSRN fuel. Measurements were
performed for analysis of droplet velocity development at 25 points about the hollow cone spray
edge at three heights at various time delays. Selected measurement locations reveal the different
behaviors of droplets inside and outside the spray cone. Complementary liquid penetration length
and spray tip velocity measurements were performed at various delays after the start of injection
with the high-speed diffused back-illumination (DBI) imaging. Measurements from the two
different techniques are compared.
Jianguo Du is a Ph.D Student from the group of Prof. William Roberts.