Journal of the Visualization Society of Japan
Online ISSN : 1884-037X
Print ISSN : 0916-4731
ISSN-L : 0916-4731
Concentration Measurements of a High-Speed Unsteady Gaseous Jet Using a Mie Scattering Method
Masatoshi YANAGISAWAMikiya ARAKISeiichi SHIGAHisao NAKAMURATomio OBOKATATakamasa UEDAMitsuhiro TSUEMichikata KONO
Author information
JOURNAL FREE ACCESS

2007 Volume 27 Issue Supplement1 Pages 89-92

Details
Abstract
Concentration measurements of a high-speed unsteady gaseous jet were carried out using a Mie scattering method. Helium is injected through an automotive gaseous fuel injector into a pressure vessel. The injection pressure is set at 4.0 and 9.0 MPa(g), and the ambient pressure is varied from 0.1 to 1.0 MPa(a). The pressure vessel is filled with 1.2 μm-diameter scattering particles, and a pulse laser sheet is projected along the jet axis. Due to the displacement of the scattering particles, the Mie scattered light intensity decreases with the increase in the helium concentration. It is observed that the helium concentration along the jet axis decreases gradually with the downstream distance, and that it decreases rapidly near the jet tip. With the increase in the ambient pressure, the helium concentration inside the jet decreases. It is observed that the helium concentration in the jet has a self-similarity in the radial direction, which indicates that the intermittent gaseous jet can be treated as a steady jet except for the jet tip region.
Content from these authors
© The Visualization Society of Japan
Previous article Next article
feedback
Top