Prediction and Measurement of Combustion Limit of Gaseous Fuel Mixed with Air in Intake Pipe of Diesel Engines

The art of supplementary-fueling diesel engines by feeding certain gaseous fuel is well-known technique for improving the engine's smoke limited output. The thermal efficiency of these engines strongly depend on the combustion limit of the gaseous fuel around the gasoil spray.

In this paper the lean limit of the gaseous fuel around the gasoil sprays in the diesel engine is measured by OFT technique. The measured combustion limit agrees with the estimated value from the numerical model developed by the authors.