Instantaneous and 2-dimensional measurement of nitric oxide concentration in a diesel spray flame

Although the time-space mechanism of NO_x formation in diesel injection combustion at high temperature and pressure has conventionally been pursued by the sampling method, and so forth, the cause-effect relationship of its formation factors remains to be more accurately clarified. In our present study, concentrations of NO, OH and soot in diesel spray flames from a single injection nozzle at high temperature and pressure were measured by use of a motoring compressed injection test system with application of laser-induced fluorescence and laser-induced incandescence, both of which can provide unperturbed measurements necessary for clarifying formation characteristics of harmful exhaust substances in diesel fuel flames at high pressure.