Experimental and regression analysis of noise and vibration of a compression ignition engine fuelled with various biodiesels


ULUDAMAR E. , TOSUN E. , AYDIN K.

FUEL, cilt.177, ss.326-333, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

Noise and vibration of ignition compression engine is one of the most complicated field to cope with since every mechanism that compose of the engine affect them separately. In this study, effect of various biodiesel on engine noise and vibration has been studied on an unmodified compression ignition engine. Linear and non-linear based regression analysis based models were also developed to predict the relationship between fuel properties and noise-vibration of the engine with excellent agreement. The results revealed that noise and vibration of the engine decreased with increasing biodiesel ratio until pure biodiesel usage and in linear regression analysis, correlation coefficient (R) values were 0.784 and 0.741 for vibration and sound pressure level, correspondingly. In non-linear regression analysis, correlation coefficient (R) values were 0.814 and 0.777 for vibration and sound pressure level, correspondingly. In linear regression analysis, mean absolute percentage error (MAPE) values were 0.747% and 0.126% for vibration and sound pressure level, correspondingly. In non-linear regression analysis, mean absolute percentage error (MAPE) values were 0. 682% and 0.342% for vibration and sound pressure level, respectively. (C) 2016 Elsevier Ltd. All rights reserved.

Depletion thread of fossil fuels and emission regularities of countries enforce researchers to use alternative resources in diesel engines. Hydrogen and biodiesel are one of the most important alternative fuels. Therefore, all effect of them must be investigated on diesel engine. In this study, experimental investigation was conducted on an unmodified fourstroke four-cylinder compression ignition engine, in order to comprehend its noise and vibration characteristics when the engine was fuelled with sunflower, canola, and corn biodiesel blends with %20 and %40 volume ratio while H2 injected through inlet manifold with 3 l/min and 6 l/min flow rates. The results revealed that changes of sound pressure level with H2 addition depended on engine speed whereas vibration acceleration was decreased with addition of gas at all engine speeds. Furthermore, in this paper exhaust emission characteristic of the engine when it was fuelled with sunflower, canola, and corn biodiesel blends and H2 gas addition was presented.