This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Optical Characterization of the Effect of High-Pressure Hydrodynamic Cavitation on Diesel
Technical Paper
2016-01-0841
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Most modern high-pressure common rail diesel fuel injection systems employ an internal pressure equalization system in order to support needle lift, enabling precise control of the injected fuel mass. This results in the return of a fraction of the high-pressure diesel back to the fuel tank. The diesel fuel flow occurring in the injector spill passages is expected to be a cavitating flow, which is known to promote fuel ageing. The cavitation of diesel promotes nano-particle formation through induced pyrolysis and oxidation, which may result in deposits in the vehicle fuel system. A purpose-built high-pressure cavitation flow rig has been employed to investigate the stability of unadditised crude-oil derived diesel and paraffin-blend model diesel, which were subjected to continuous hydrodynamic cavitation flow across a single-hole research diesel nozzle. Continuous in-situ spectral optical extinction (405 nm) has been employed to identify and determine variations in fuel composition as a function of the cavitation duration. The results of two high-pressure diesel cavitation experiments are reported. The first dealt with the effect of injection pressure on the rate of induced variation in chemical composition of diesel, and concluded that faster degradation of the fuel occurred at higher pressure. The second experiment involved an investigation into the variation in composition occurring in diesel fuel and the paraffin-blend model diesel, subjected to cavitating flow over a longer duration. Observed differences suggest that the high-pressure cavitation resulted in hydrodynamic sono-chemical destruction of aromatics in the diesel, which is believed to lead to carbonaceous nano-particle formation.
Recommended Content
Authors
Citation
Lockett, R., Fatmi, Z., Kuti, O., and Price, R., "An Optical Characterization of the Effect of High-Pressure Hydrodynamic Cavitation on Diesel," SAE Technical Paper 2016-01-0841, 2016, https://doi.org/10.4271/2016-01-0841.Also In
References
- Price R. , Blazina D. , Smith G. , Davies T. Understanding the impact of cavitation on hydrocarbons in the middle distillate range Fuel 156 30 39 2012
- Suslick KS , Gawienowski JJ , Schubert PF and Wang HH Alkane Sonochemistry J Phys Chem 87 13 2299 2301 1983
- Price GJ and McCollom M. The effect of high intensity ultrasound on diesel fuels Ultrason Sonochem 2 2 S67 S70 1995
- Price GJ and McCollom M. Use of high-intensity ultrasound as a potential test method for diesel fuel stability Fuel 74 9 1394 1397 1995
- Ullmann , J. , Geduldig , M. , Stutzenberger , H. , Caprotti , R. et al. Investigation into the Formation and Prevention of Internal Diesel Injector Deposits SAE Technical Paper 2008-01-0926 2008 10.4271/2008-01-0926
- Pehan S , Jerman MS , Kegl M and Kegl B. Biodiesel influence on tribology characteristics of a diesel engine Fuel 88 6 970 979 2009
- Caprotti , R. , Breakspear , A. , Graupner , O. , Klaua , T. et al. Diesel Injector Deposits Potential in Future Fueling Systems SAE Technical Paper 2006-01-3359 2006 10.4271/2006-01-3359
- Lockett , R.D. and Jeshani , M. An experimental Investigation into the Effect of Hydrodynamic Cavitation on Diesel Int. J. of Eng. Res. 14 6 606 621 2013
- Erwin J. Assay of diesel fuel components properties and performance Sym. Proc. Prod. Sel. Synth. Fuels, Division of Fuel Chemistry, American Chemical Society Washington, USA 1915 1923 23 - 28 August 1992