A gasoline fuel injector was modified to allow the addition of electrostatic charging to the spray as an additional means of controlling fuel dispersion. An electrode with a sharp orifice was placed over the tip of the injector to inject charge into the low conductivity liquid. The spray was characterized with images obtained using a MIE scattering technique, droplet sizes were measured with Fraunhoffer diffraction, and velocity fields were obtained with Particle Imaging Velocimetry. Results showed that the charged sprays exhibited greater penetration and with and repeatability of droplet size. The velocity fields revealed increased vorticity and axial droplet velocity.
Characterization of an Electrostatically Charged GDI Spray
CARLUCCI, Antonio Paolo;DE RISI, Arturo;
2006-01-01
Abstract
A gasoline fuel injector was modified to allow the addition of electrostatic charging to the spray as an additional means of controlling fuel dispersion. An electrode with a sharp orifice was placed over the tip of the injector to inject charge into the low conductivity liquid. The spray was characterized with images obtained using a MIE scattering technique, droplet sizes were measured with Fraunhoffer diffraction, and velocity fields were obtained with Particle Imaging Velocimetry. Results showed that the charged sprays exhibited greater penetration and with and repeatability of droplet size. The velocity fields revealed increased vorticity and axial droplet velocity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
