An Investigation into the Effect of Hydrodynamic Cavitation on Diesel using Optical Extinction

9th International Symposium on Cavitation

Lockett, R.D.^1 ; Fatmi, Z.^1 ; Kuti, O.^1 ; Price, R.^2

Department of Mechanical Engineering and Aeronautics, City University, Northampton Square, London

EC1V 0HB, United Kingdom^1

Shell Global Solutions, Brabazon House, Concord Business Park, Threapwood Road, Manchester

M22 0RR, United Kingdom^2

关键词: Carbonaceous particles;    Hydrodynamic cavitations;    Optical arrangement;    Optical extinction;    Re-circulation flow;    Spectral absorbance;    Spectral extinctions;    Steady-state values;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012091/pdf
DOI  :  10.1088/1742-6596/656/1/012091

来源: IOP

【 摘 要 】

A conventional diesel and paraffinic-rich model diesel fuel were subjected to sustained cavitation in a custom-built high-pressure recirculation flow rig. Changes to the spectral extinction coefficient at 405 nm were measured using a simple optical arrangement. The spectral extinction coefficient at 405 nm for the conventional diesel sample was observed to increase to a maximum value and then asymptotically decrease to a steady-state value, while that for the paraffinic-rich model diesel was observed to progressively decrease. It is suggested that this is caused by the sonochemical pyrolysis of mono-aromatics to form primary soot-like carbonaceous particles, which then coagulate to form larger particles, which are then trapped by the filter, leading to a steady-state spectral absorbance.