RT Journal Article ID 232fe15a0cb27f54 A1 Stratmann, Jochen A1 Martin, D. A1 Unterlechner, P. A1 Kneer, Reinhold T1 NEAR-WALL CHARACTERISTICS OF AN IMPINGING GASOLINE SPRAY AT INCREASED AMBIENT PRESSURE AND WALL TEMPERATURE JF Atomization and Sprays JO AAS YR 2009 FD 2009-12-01 VO 19 IS 11 SP 997 OP 1012 AB With a focus on the direct-injection gasoline (GDI) engine, this work provides near-wall spray details of the liquid phase of an impinging fuel spray at GDI engine conditions. The experiments are conducted in a constant volume pressure chamber at elevated gas pressure (pgas = 0.6 and 1.5 MPa), increased gas temperature (Tgas = 500 K), and variable wall temperature (Tw = 400 and 575 K). Using phase-Doppler anemometry, temporally and spatially resolved mean droplet sizes and velocity components are determined at distances from 0.2 to 1.0 mm above the surface. The transient behavior of the wall jet, which develops along the surface, is resolved by the measurements. The formation of a vortex at the front of this jet is observed. At its tip, large mean droplet diameters are observed that coincide with a rapid change of the wall-normal velocity. An increasing wall temperature causes the tip of the wall jet to propagate slower along the wall, which is apparently caused by a change in the local density of the gas above the surface. PB Begell House LK https://www.dl.begellhouse.com/journals/6a7c7e10642258cc,08fc39f53290f6f4,232fe15a0cb27f54.html