A new multi-spectral detection strategy for temperature laser- induced- fluorescence (LIF) 2-D
imaging measurements is reported for high pressure flames in high-speed diesel engine. Schematic of the
experimental set-up is outlined and the experimental data on the diesel engine is summarized. Experiment injection
system is a third generation Bosch high-pressure common rail featuring a maximum pressure of 160MPa. The
injector is equipped with a six-hole nozzle, where each hole has a diameter of 0.124 mm. and slightly offset to the
center of the cylinder axis to allow a better cooling of the narrow bridge between the exhaust valves. The
measurement system includes a blower, which supplied the intake flow rate, and a prototype single-valve direct
injection diesel engine head modified to lay down the swirled-type injector. 14-bit digital CCD cameras are
employed to achieve a greater level of accuracy in comparison to the results of previous measurements. The
temperature field spatial distributions in the cylinder for different crank angle degrees are carried out in a single
direct-injection diesel engine.
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