International Scientific Journal


Modern tendencies in the development of diesel engines include the operation of the system for injecting diesel fuel at pressures higher than 100 MPa. Knowing the characteristics of liquid fuels such as speed of sound, bulk modulus and density depending on pressure, is important for predicting the behavior of fuel injection systems for diesel engines and optimization of the same. The paper presents an original method and apparatus (device) for determining the speed of sound and density of fluids depending on the pressures. With this method, values of these characteristics for rapeseed oil, biodiesel and conventional diesel fuel at pressures up to 160 MPa are determined. The method is non-destructive, it can also be applied to higher pressures than 160 MPa, as well as other liquid fluids that are used at high pressure - hydraulic oil, for example.
PAPER REVISED: 2012-07-06
PAPER ACCEPTED: 2012-07-19
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2012, VOLUME 16, ISSUE Supplement 2, PAGES [S505 - S514]
  1. Torres-Jimenez E., Dorado MP., Kegl B., Experimental investigation on injection characteristics of bioethanol¡Vdiesel fuel and bioethanol¡Vbiodiesel blends, Fuel (2011), 90(5), pp.1968-1979
  2. Caresana F., Impact of biodiesel bulk modulus on injection pressure and injection timing. The effect of residual pressure, Fuel (2011), 90, pp.477¡V485
  3. Yamane K., Ueta A., Shimamoto Y., Influence of physical and chemical properties of biodiesel fuels on injection, combustion and exhaust emission characteristics in a direct injection compression ignition engine, International Journal of Engine Research (2001), 2(4), pp.249¡V261
  4. Bannikov MG., et al., Investigation of the characteristics of the fuel injection pump of a diesel engine fuelled with viscous vegetable oil¡Vdiesel oil blends. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 2006;220(6), pp.787¡V792
  5. Zhang GD., et al., Study on the injection process of a direct-injection diesel engine fueled with dimethyl ether. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 2004;218(11), pp.1341¡V1347
  6. Nikolic, B., The study of physical characteristics of rapeseed oil and rape methylester as fuels in internal combustion engines, M.Sc. thesis, Mechanical Engineering Faculty University of Nis, Serbia, 2006
  7. Stefanovic, A., Diesel engines with fuel based on vegetable oils, Monograph, Mechanical Engineering Faculty University of Nis, Nis, Serbia, 1999
  8. Cernej A., Dobovisek Z., Fuel supply diesel and otto engines, Sarajevo, BIH, 1980
  9. Kegl B., Hribernik A., Experimental analysis of injection characteristics using biodiesel fuel, Energy Fuels (2006), 20, pp.2239¡V2248
  10. Winterbone DE., Pearson RJ., Theory of engine manifold design. Wave action methods for IC engines. Professional Engineering Publishing, London, UK, 2000
  11. Huber ML., et al., Model for the thermodynamic properties of a biodiesel fuel, Energy & Fuels (2009), 23, pp.3790¡V3797
  12. Tat ME., et al., The speed of sound and isentropic bulk modulus of biodiesel at 21¢XC from atmospheric pressure to 35 MPa. JAOCS (2000), 77(3), pp.285-289
  13. Tat ME., Van Gerpen JH., Effect of temperature and pressure on the speed of sound and isentropic bulk modulus of mixtures of biodiesel and diesel fuel. JAOCS (2003), 80(11), pp.1127-1130
  14. Ott LS., Huber ML., Bruno TJ., Density and speed of sound measurements on five fatty acid methyl esters at 83 kPa and temperatures from 278.15 to 338.15 K, Journal of Chemical ƒt Engineering Data (2008), 53, pp.2412¡V2416
  15. Dzida M., Prusakiewicz P., The effect of temperature and pressure on the physicochemical properties of petroleum diesel oil and biodiesel fuel. Fuel (2008), 87, pp.1941¡V1948
  16. Payri R., et al., The effect of temperature and pressure on thermodynamic properties of diesel and biodiesel fuels. Fuel (2011), 90, pp.1172¡V1180
  17. Tufeu, R., Measurement of thermophysical properties of fluids. Experimental Thermal and Fluid Science, (1990), 3(1), pp.108-123

© 2023 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence