@article{article_1651115, title={Noise and vibration behavior of a diesel engine operating with CNT-blended fuels and different EGR rates}, journal={International Journal of Automotive Engineering and Technologies}, volume={14}, pages={199–214}, year={2025}, DOI={10.18245/ijaet.1651115}, author={Çelebi, Samet and Demir, Üsame}, keywords={Dizel Motor, Karbon Nanotüp, Titreşim, Gürültü}, abstract={In this study, the effects of carbon nanotube (CNT)-blended fuels on engine noise and vibration levels were experimentally investigated in a single-cylinder, air-cooled, direct-injection diesel engine. CNTs were introduced as single-wall (SWCNT) and multi-wall (MWCNT) variants at concentrations of 25 ppm and 50 ppm. Tests were performed at engine loads of 0%, 25%, 50%, 75%, and 100%, and EGR (Exhaust Gas Recirculation) rates of 0%, 10%, and 20%. The results showed a clear trend of increasing noise and vibration levels with rising engine load. For instance, the noise level for D100 fuel rose from 94.84 dB (0% load) to 96.71 dB (100% load), while SW50 increased from 95.92 dB to 97.80 dB, and MW50 from 95.12 dB to 97.61 dB. Regarding vibration, D100 increased from 96.23 m/s² to 96.94 m/s², whereas SW25 showed a rise from 89.17 m/s² to 101.90 m/s², and MW50 maintained more stable values from 98.28 m/s² across the load range. Increasing the EGR rate generally reduced both acoustic parameters, especially under low-load conditions. Notably, MW50 fuel yielded the most consistent reduction in vibration, while SW50 tended to amplify noise at full load. These findings suggest that MWCNTs, particularly at higher concentrations, offer improved vibration mitigation, whereas SWCNTs may enhance noise under certain conditions. The combined use of CNT additives and EGR presents a promising strategy for tuning diesel engine acoustic behavior.}, number={3}, publisher={Murat CİNİVİZ}