Kinetic Energy and Dissipation Rate Spectra of High- and Low-Swirl Internal Combustion Engine Flows

Format:

Conference/Event

Author/Creator:

Fajardo, Claudia M., author.

Conference Name:

SAE World Congress & Exhibition (2009-04-20 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2009

Summary:

This paper presents total kinetic energy and dissipation rate spectra calculated from particle image velocimetry (PIV) measurements in a motored, spark-ignition direct-injection (SIDI) engine. Velocity fields were obtained at two engine speeds and swirl conditions in the second half of the compression stroke. Two magnifications were used to achieve a spatial dynamic range covering from the full cross-section of the flat piston window (45 mm) down to 350 μm. Sets of 300 instantaneous vector fields were filtered using a Gaussian filter to isolate flow structures over a range of length-scales.The kinetic energy and dissipation rate spectra have been normalized using mean kinetic energy and mean piston speed. Results indicate that if the mean piston speed is selected as the representative outer variable, the kinetic energy and dissipation rate spectra at 2000 RPM and 600 RPM become self-similar over a portion of the spectra regardless of swirl level

Notes:

Vendor supplied data

Publisher Number:

2009-01-0651

Access Restriction:

Restricted for use by site license