The aim of this study was to investigate the spray characteristics of biodiesel and n-butanol/biodiesel blended fuel. The spray tip penetration and the spray cone angle were tested and analyzed. A constant volume chamber and high-speed camera were used to observe the spray evolution and a common-rail system was employed to change the injection pressure. The results show that the spray tip penetration and the spray cone angle of biodiesel are larger than those of blended fuel in most cases. n-Butanol additive changes the relationship between angle and density ratio to a certain degree. The experimental trend lines support the penetration model proposed by Hiroyasu and Arai in terms of similar proportional relation on time after start of injection, and the empirical equations provide reasonable agreement with the experimental data of the spray tip penetration.
RakopoulosCDAntonopoulosKARakopoulosDCet al.Comparative performance and emissions study of a direct injection diesel engine using blends of diesel fuel with vegetable oils or biodiesels of various origins. Energy Convers Manage2006; 47: 3272–3287.
2.
QinJLiuHYaoMet al.Experiment study on diesel engine fueled with biodiesel and diesel fuel. J Combust Sci Technol2007; 13: 335–340.
3.
MurugesanAUmaraniCSubramanianRet al.Bio-diesel as an alternative fuel for diesel engines: A review. Renew Sustain Energy Rev2009; 13: 653–662.
4.
QiDGengLChenHet al.Combustion and performance evaluation of a diesel engine fueled with biodiesel produced from soybean crude oil. Renew Energy2009; 34: 2706–2713.
5.
ChiuCWSchumacherLGSuppesGJ. Impact of cold flow improvers on soybean biodiesel blend. Biomass Bioenergy2004; 27: 485–491.
6.
Shudo T, Fujibe A, Kazahaya M, et al. The cold flow performance and the combustion characteristics with ethanol blended biodiesel fuel. SAE Technical Paper No. 2005-01-3707, 2005.
7.
ParkSHSuhHKLeeCS. Nozzle flow and atomization characteristics of ethanol blended biodiesel fuel. Renew Energy2010; 35: 144–150.
8.
YoonSHParkSHSuhHKet al.Effect of biodiesel-ethanol blended fuel spray characteristics on the reduction of exhaust emissions in a common-rail diesel engine. J Energy Resour Technol2008; 132: 463–470.
9.
SongLLinQXieYet al.Experimental study of the spray characteristics of diesohol fuel using a high pressure common rail injection system in a diesel engine. Energy Technol2015; 3: 896–905.
10.
AydinHİlkılıçC. Effect of ethanol blending with biodiesel on engine performance and exhaust emissions in a CI engine. Appl Therm Eng2010; 30: 1199–1204.
11.
LiuHLeeCHuoMet al.Comparison of ethanol and butanol as additives in soybean biodiesel using a constant volume combustion chamber. Energy Fuels2011; 25: 1837–1846.
12.
EzejiTCQureshiNBlaschekHP. Continuous butanol fermentation and feed starch retrogradation: Butanol fermentation sustainability using Clostridium beijerinckii BA101. J Biotechnol2005; 115: 179–187.
13.
ChotwichienALuengnaruemitchaiAJai-InS. Utilization of palm oil alkyl esters as an additive in ethanol-diesel and butanol-diesel blends. Fuel2009; 88: 1618–1624.
14.
LujajiFKristófLBereczkyAet al.Experimental investigation of fuel properties, engine performance, combustion and emissions of blends containing croton oil, butanol, and diesel on a CI engine. Fuel2011; 90: 505–510.
15.
JinCYaoMLiuHet al.Progress in the production and application of n-butanol as a biofuel. Renew Sustain Energy Rev2011; 15: 4080–4106.
16.
RakopoulosDC. Combustion and emissions of cottonseed oil and its bio-diesel in blends with either n-butanol or diethyl ether in HSDI diesel engine. Fuel2013; 105: 603–613.
17.
YilmazNVigilFMBenalilKet al.Effect of biodiesel–butanol fuel blends on emissions and performance characteristics of a diesel engine. Fuel2014; 135: 46–50.
18.
HuangYTianWWangJet al.Performance and emissions of a direct injection diesel engine operating on biodiesel-n-butanol blends. J Chang’an Univ2016; 36: 105–111.
19.
Hiroyasu H and Arai M. Structures of fuel sprays in diesel engines. SAE Technical Paper 900475, 1990.
20.
OhnesorgeW. Die Bildung von Tropfen an Düsen und die Auflösung flüssiger Strahlen. ZAMM - J Appl Math Mech1936; 16: 355–358.
21.
Reitz RD and Bracco FV. Mechanisms of breakup of round liquid jets. In: Cheremisnoff N (ed.) Encyclopedia of fluid mechanics. Houston, TX: Gulf Publishing, Vol. 3, 1986, pp.233–249.
LiYXuH. Experimental study of temporal evolution of initial stage diesel spray under varied conditions. Fuel2016; 171: 44–53.
24.
AleiferisPGRomundeZR. An analysis of spray development with iso-octane, n-pentane, gasoline, ethanol and n-butanol from a multi-hole injector under hot fuel conditions. Fuel2013; 105: 143–168.
25.
XieHLinQSongLet al.An experimental study on the macroscopic spray characteristics of biodiesel and diesel in a constant volume chamber. Energies2015; 8: 5952–5972.
26.
MoJTangCHuangZet al.Experimental investigation on the effect of n-butanol blending on spray characteristics of soybean biodiesel in a common-rail fuel injection system. Fuel2016; 182: 391–401.
27.
BougieBTulejMDreierTet al.Optical diagnostics of diesel spray injections and combustion in a high-pressure high-temperature cell. Appl Phys B2005; 80: 1039–1045.
28.
Naber J and Siebers D. Effects of gas density and vaporization on penetration and dispersion of diesel sprays. SAE Technical Paper 960034, 1996.
29.
EmbersonDRIhracskaBImranSet al.Optical characterization of Diesel and water emulsion fuel injection sprays using shadowgraphy. Fuel2016; 172: 253–262.
