Technical Paper
Development of an Infrared Method for Ignition Delay Measurements
1991-02-01
910847
The paper describes experimental validation of a laboratory flow apparatus used to measure the ignition delay times of diesel fuels at atmospheric pressure in near quiescent air. To validate the proposed method the experimental data were compared with the results from the studies performend on non-engine combustion chambers with continuous air flow at atmospheric pressure and various temperatures. The proposed flow apparatus, described in an earlier paper, has the means to provide air temperatures in the range between 650 and 730°C. An infrared radiation detector monitors the evolution of the temperature inside the combustion chamber. Ignition delay is measured as the time interval between the beginning of the needle lift and the beginning of increase in infrared radiation detected by the sensor. Six test fuels were used.