1998-10-19

In-Cylinder Fuel/Air Mixture and Flame Front Visualization in a Transparent Engine Using PLIF: A Comparison Between Natural Gas and Gasoline Used as a Fuel 982524

This study was carried out in a transparent engine. In this work we have compared results obtained from a natural gas engine fueled with a standard continuous gas injection with results obtained from a gasoline engine fueled with electronic sequential injection. To compare performance between engines of both types, we have carried out quantitative measurements of fuel/air ratio before ignition and flame image recording. Laser induced fluorescence was used with an excimer KrF laser. As the natural gas and gasoline were not fluorescent at the laser wavelength (248nm), a tracer has been mixed to the fuel. Furthermore, as this tracer is also a fuel, the fresh charge in the cylinder was fluorescent, whereas the burnt gas was not, which enable detection of flame fronts. The images recorded at different crank-angles allowed determination of parameters such as inhomogeneity, overall flame width and spatial propagation speed of flame. Those parameters yielded a characterization of the cycle-to-cycle fluctuations of mixture preparation and flame position and propagation.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X