The Rating Factors in of Jet Fuel Formation in Channel Spray Nozzles Diesel

Abstract

A two-stage approach to the selection of the parameters of hydraulic channels of the spray nozzles is proposed. On the first stage, the preliminary assessment of their quality is made according to the nature of the flow of the atomized medium using the inviscid incompressible fluid model. On the second stage, the detailed calculation of the Navier-Stokes equations, the thermal conductivity, and the vorticity of the nonisothermal viscous flow are performed, taking into account the phenomena of phase transitions of the real medium for the nozzle designs and their parameters selected at the first stage. The technique of high-quality, simplified, cost-effective computing costs by assessing the impact of the geometric parameters of the sprayer channels to form fuel jets. The calculation of the velocity field and flow lines and flow field transformation to parametric rectangle with an orthogonal grid calculated by numerical conformal mapping are demonstrated. The influence of the channel configuration on the formation of the jet is analyzed. The distribution of velocities in different zones of the channel is estimated from the point of view of the possibility of controlling the spraying characteristics of the injector.