This knowledge will help lead to improvements in diesel engine efficiencies while also reducing emissions - a formidable challenge. As the jet contacts the wall, the leading edge deforms to the shape of the surface, and the diffusion flame initially remains intact even though it is close to the wall. Within 70 microseconds of contacting the wall, the flame goes out along the entire front of the jet and remains active only along the sides. After the flame is extinguished, the soot-laden core of the jet impinges directly on the wall.
Researchers plan to Extend the study to include the rate of soot deposition on the cylinder walls.
Research Partners Sandia National Laboratories Cummins Engine Company Caterpillar Inc.