Numerical Analysis of Emissions and Operating Range of Acetone Fuel in a Homogenous Charge Compression Ignition at Different Engine Speeds

In this work an evaluation of operating range in a HCCI engine fueled with acetone using an onion skin multizone model has been developed. The effect from physical and chemical processes for engines can be obtained from this model with a lower computational demand. Several consecutive cycles can be simulated in minutes compared with others, such as CFD models, which requires either hours or days. A single cylinder HCCI engine fueled with PRF90 was simulated and compared with literature data. A good agreement with experimental data allowed to analyze the engine performance with acetone and iso-octane (50% by volume for each) as fuel at several engine speeds. The results show a comparison of pressure profiles and indicated mean pressure as a function of equivalence ratio and engine speeds. A mixture labelled as IAF50 (iso-octane 50% by volume and acetone 50% by volume) show a delayed start of combustion compared with IAF50 (iso-octane 100% by volume and acetone 0% by volume). This work is a start point to obtain operating region of HCCI engine fueled with of acetone-isooctane mixtures