The spray/wall interaction in small direct-injection diesel engines employing swirl was simulated in a bench-type experiment by a steady cross-flow of air acting on a transient diesel spray impinging normally onto a heated and unheated flat plate under atmospheric conditions. The droplet size and velocity characteristics in the radial wall-jet formed on the plate after spray impingement were investigated by phase-Doppler anemometry and the spray/wall heat transfer during impingement was measured using fast-response thermocouples. The results showed that the mechanism of secondary atomisation of the impinging droplets was altered as droplets from the approaching spray were entrained by the cross-flow, while the spray/wall heat transfer was reduced due to the lower droplet flux reaching the wall. Based on the approaching droplet velocity and size characteristics and wall temperature, an empirical correlation has been derived between the flow and heat transfer parameters.
Flow and Heat Transfer Characteristics of Impinging Diesel Sprays Under Cross-Flow Conditions
Sae Technical Papers
International Congress & Exposition ; 1995
1995-02-01
Aufsatz (Konferenz)
Englisch
Flow and Hear Transfer Characteristics of Impinging Diesel Sprays under Cross-Flow Conditions
Kraftfahrwesen | 1995
|Flow and Heat Transfer Characteristics of Impinging Transient Diesel Sprays
SAE Technical Papers | 1994
|Flow and heat transfer characteristics of impinging transient diesel sprays
Kraftfahrwesen | 1994
|Heat transfer characteristics of impinging diesel sprays
Kraftfahrwesen | 1989
|Heat Transfer Characteristics of Impinging Diesel Sprays
SAE Technical Papers | 1989
|