Bulk modulus of vegetable oil-diesel fuel blends

Bulk moduli of fuel blends containing different concentrations of vegetable oil and diesel have been measured at three different fuel temperatures. Presence of vegetable oil in the mixture increases the bulk modulus over that for the straight diesel fuel. For a given fuel pressure and fuel temperature, bulk modulus of the blend increases as the concentration of the vegetable oil in the blend increases. Increase in fuel temperature lowers the values of bulk moduli at all fuel pressures.