Effect of Gas Density and Temperature on Air Entrainment in a Transient Diesel Spray

960862

02/01/1996

Event
International Congress & Exposition
Authors Abstract
Content
The air entrainment in a transient diesel spray was studied using laser Doppler anemometry to provide information on the effect of gas density and temperature. The spray was injected vertically into a confined quiescent atmosphere and the entrained mass flow rate was evaluated by measuring the air velocity component normal to a cylindrical geometric surface surrounding the spray, and extending to about 200 nozzle diameters (50 mm). The experimental results, relative to a density range from 0.84 to 7.02 kg/m3 and a temperature range from 293 to 473 K, indicate that the non dimensional entrainment rate, averaged in time over the main injection period, depends on the distance from the nozzle and both gas density and temperature. A first analysis, based on the available data, allowed to quantify the dependence and provided a correlation with such variables.
Meta TagsDetails
DOI
https://doi.org/10.4271/960862
Pages
13
Citation
Cossali, G., Gerla, A., Coghe, A., and Brunello, G., "Effect of Gas Density and Temperature on Air Entrainment in a Transient Diesel Spray," SAE Technical Paper 960862, 1996, https://doi.org/10.4271/960862.
Additional Details
Publisher
Published
Feb 1, 1996
Product Code
960862
Content Type
Technical Paper
Language
English