Determining the speed of sound, density and bulk modulus of rapeseed oil, biodiesel and diesel fuel

• Main Authors: Nikolić Boban D., Kegl Breda, Marković Saša D., Mitrović Melanija S.
• Format: Article
• Language: English
• Published: VINCA Institute of Nuclear Sciences 2012-01-01
• Series: Thermal Science
• Subjects: biodiesel; rapeseed oil; diesel; speed of sound; bulk modulus; density; high pressure
• Online Access: http://www.doiserbia.nb.rs/img/doi/0354-9836/2012/0354-98361200187N.pdf

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.