High-speed OH chemiluminescence imaging is used to measure the lift-off length of diesel sprays in an optical heavy-duty diesel engine of 2 L displacement operated at 1200 rpm and 5 bar IMEP. Stereoscopic images are acquired at two different wavelengths (310 and 330 nm). Subtraction of pairwise images helps reducing the background coming from natural soot incandescence in the OH chemiluminescence images. Intake air temperature (343 to 403 K), motored top dead center density (18 to 22 kg/m3), fuel injection pressure (150 to 250 MPa), intake oxygen concentration (17 to 21 %vol) and nozzle diameter (0.1 and 0.14 mm) are varied and a nonlinear regression model is derived from the experimental results to describe stabilized lift-off length as function of the experimental factors. The lift-off length follows the general trends that are known from spray vessel investigations, but the strength of the dependence on certain variables deviates strongly from those studies. The experimental correlation obtained for the lift-off length in the aforementioned ambient conditions has the following form:
Lift-Off Length in an Optical Heavy-Duty Diesel Engine
Sae Int. J. Engines
SAE 2015 World Congress & Exhibition ; 2015
Sae International Journal of Engines ; 8 , 2 ; 635-646
2015-04-14
12 pages
Aufsatz (Konferenz)
Englisch
Lift-Off Length in an Optical Heavy-Duty Diesel Engine
British Library Conference Proceedings | 2015
|Lift-off length on an optical heavy-duty diesel engine
Kraftfahrwesen | 2015
|Lift-Off Length in an Optical Heavy-Duty Diesel Engine: Effects of Swirl and Jet-Jet Interactions
SAE Technical Papers | 2015
|Lift-Off Length in an Optical Heavy-Duty Diesel Engine: Effects of Swirl and Jet-Jet Interactions
British Library Conference Proceedings | 2015
|Heavy Duty Diesel Engine Oil Filterability
SAE Technical Papers | 1984
|