METHOD AND DEVICE FOR DETERMINING CHARACTERISTICS OF FUEL JET Russian patent published in 2011 - IPC G01N33/22 G01N15/02 G01N21/17 

FIELD: physics.

SUBSTANCE: when implementing the method, a jet of atomised fuel which contains fluorescent additives is illuminated with a laser beam which is polarised perpendicular to the scattering plane. The colour image of the cross-section of the jet is then recorded. That image is then divided into characteristic colours from which fluorescence intensity of the fuel and Mi of light scattered by droplets at points in rows of the image of the cross-section of the jet. Intensity of light falling and passing through the jet of the atomised fuel on each row of the image of the cross-section of the jet is measured. The ratio of intensities of the scattered light from the slit and the sector is used to determine integral values of the average Sauter diameter of the droplet along the row of the image of the cross-section of the jet, as well as surface and volume concentration of droplets. The device for determining characteristics of a fuel jet has series-arranged laser source of monochromatic light and a colour digital video camera lying orthogonal to the optical axis of the light source and connected to a computer. The device if fitted with a spherical converging lens, a laser device for measuring dispersion with an integrating diaphragm, connected to electrical pulse converters whose outputs are connected to the computer through a crater system.

EFFECT: high information content and broader capabilities, as well as high accuracy and reliability of measurements when determining atomisation characteristics of a fuel jet in low-pressure chamber conditions.

3 cl, 1 dwg