Abstract
The adoption of alternative fuel engines has been considered as one of the most important strategies to solve the problems of energy dependence and air quality. The use of LPG-Hydrogen blends in internal combustion engines is an effective alternative to pure fossil fuels because of its high efficiency and its superior properties. Small percentage of hydrogen addition can improve LPG engine performance. In this study, the effects of Hydrogen enrichment and compression ratio on engine piston are numerically evaluated on a gaseous engine. Piston made of Aluminum alloy, is a primordial part and behaves as heart of the internal combustion engine. Furthermore, the stress distribution is evaluated on the piston of engine fueled with LPG-H2 blend by using finite element analysis technique. In the present study, the piston model is developed using Solidworks software. The analysis part was carried out using Solidworks-Simulation for static analysis. The mechanical stresses distribution is calculated. Alpax-Aluminum alloy is used as piston material. The results showed that increasing Hydrogen volumetric fraction and compression ratio have similar effects on the engine in-cylinder pressure. The stress analysis results also showed that the piston resistance of the converted engine is verified. A comparison with literature work is performed to validate the numerical work.
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