LASER-INDUCED-FLUORESCENCE IMAGING OF NO IN AN ETA-HEPTANE-FUEL-DRIVEN AND DIESEL-FUEL-DRIVEN DIESEL-ENGINE

Continuous on-line imaging by 2D-LIF techniques of in-cylinder NO dist ributions in a running Diesel engine is explored using an ArF-excimer laser at 193 nm operating at low power. For the first time NO excitati on spectra could be measured as a result of high optical transparencie s during measurements over longer periods of time. The averaged distri butions show different combustion behaviour of both fuels proving the potential of the 2D-LIF technique in application to non-intrusive comb ustion diagnostics in a steady running Diesel engine.