A Numerical Study Of The Effect Of The Compression Ratio On The Biodiesel Fuel Spray Characteristics At Different Blending Ratios.

Document Type : Research articles

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Mechanical Power Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt.

Abstract

In this paper a Computational fluid dynamic study was done to investigate the effect of different compression ratios and different biodiesel blending ratios on the spray characteristics. A three dimensional numerical simulation was done using ANSYS-FLUENT by using internal combustion engine module. This simulation was done on a 4-stroke engine for a Ruggerini RD 270 engine. A cold flow simulation was carried for the engine with compression ratio 18 and it was validated against [1] that was validated experimentally against a compression test performed on the engine at the “Green Energy Lab” at Faculty of Engineering, Ain Shams University. Another two cold flow simulations for compression ratios 17 and 16 were done upon this validation. After that a diesel spray model was integrated to the cold flow engine with compression ratio 18 and it was validated against [1] by comparing the penetrating length for the two models. Upon that a spray models for Diesel and different Biodiesel blending ratios 20% , 60% and 100 % were integrated to the three compression ratio engines 18 , 17 , and 16 respectively to study the effect of different compression ratios and the different biodiesel blending ratios on spray penetrating length .

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