Experimental speed-of-sound measurements of pure fatty acids methyl ester, mineral diesel and blends in a wide range of temperature and for pressures up to 300Â MPa

Accurate speed-of-sound results were obtained by means of a double reflector pulse-echo technique, in the temperature range from 273.15 K to 353.15 K and over a wide pressure range (from atmospheric pressure up to 300 MPa). The overall uncertainty for speed-of-sound values was estimated to be less than 0.3% over the whole investigated thermodynamical range.