Combustion and vibration characteristics of variable compression ratio direct injection diesel engine fuelled with diesel‐biodiesel and alcohol blends
| Autor: | S. Jaikumar, S. K. Bhatti, Lakkoju Santosh Kumar, Medidi Rajasekhar, V. Srinivas |
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| Rok vydání: | 2020 |
| Předmět: |
Biodiesel
Kusum seed oil biodiesel Variable compression ratio compression ratio Alcohol Transesterification Diesel engine Combustion lcsh:QA75.5-76.95 Automotive engineering transesterification Diesel fuel chemistry.chemical_compound chemistry lcsh:TA1-2040 Compression ratio Environmental science RMS velocity lcsh:Electronic computers. Computer science lcsh:Engineering (General). Civil engineering (General) combustion |
| Zdroj: | Engineering Reports, Vol 2, Iss 7, Pp n/a-n/a (2020) |
| ISSN: | 2577-8196 |
| Popis: | The objective of the present investigation is to explore the influence of ternary (diesel‐biodiesel‐alcohol) fuel blends on the combustion and vibration parameters of a variable compression ratio compression ignition engine. Kusum seed oil biodiesel and isobutyl alcohol were blended with conventional diesel to make a ternary fuel. The blend of biodiesel‐diesel (B20) was made in proportion of 20% and 80% by volume, respectively. Furthermore, isobutyl alcohol was added at diverse proportions (ie, 0.25%, 0.5%, 0.75%, and 1%). The investigation was carried at different compression ratios (CRs), namely, 16.5, 17.5, and 18.5. The study shows that, upon the addition of isobutyl alcohol, the combustion characteristics (ie, cylinder pressure [CP] and net heat release rate [NHRR]) are significantly enhanced, whereas the mechanical vibration level maintains stable. The CP and NHRR of B20+ 1% isobutyl alcohol are greatly improved for corresponding values of 4.55% and 8.39%, respectively, except for the conventional diesel at CR 18.5. Furthermore, the root mean square velocity (vibration) decreases when increasing the quantity of isobutyl alcohol and attained a minimum with B20+ 1% isobutyl alcohol. The experimental results show that the isobutyl alcohol up to 1% with diesel‐biodiesel blends can be used in the CI engine with no further adjustments. |
| Databáze: | OpenAIRE |
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