Effects of design and operating parameters on the performance of a quasi-realistic Diesel cycle engine

Although Diesel engines have begun to be abandoned in the automotive industrydue to the emission legislations of the world, they are still widely used ingenerators, work machines, agricultural machines, and heavy vehicles due to theirhigh power density and thermal efficiency. The classical Diesel cycle, which isthe thermodynamic cycle of Diesel engines, was developed by taking into accountirreversibilities, heat transfer losses, friction, and gas exchange process, and aquasi-realistic Diesel cycle was obtained. Also, the working fluid of the Dieselcycle has been accepted as an air-fuel-residual gas mixture instead of air. ThisDiesel cycle model is very useful to examine the effect of Diesel engines' designand operating parameters on engine performance. For this study, the effect ofvariation in equivalence ratio, stroke-bore ratio, and compression ratio on engineperformance was examined. Thermal efficiency, maximum temperature, exhausttemperature, fuel consumption, and specific fuel consumption are used as engineperformance parameters. The characteristics and operating conditions of a Dieselengine in a power generator were used for the numerical study. Engineperformance increased by increasing the equivalence ratio, which is the engineoperating parameter. When the compression ratio, which is the structuralparameter, increased, the engine performance increased, but the maximumtemperature also increased, although it was not desired. Therefore, it is necessaryto optimize the compression ratio and the maximum temperature. Again, when thestroke-bore ratio, which is a structural parameter, was increased, engineperformance decreased, but the maximum temperature decreased as desired. Foroptimization of the two structural parameters, compression ratio, and stroke-boreratio, it is necessary to decrease the stroke-bore ratio while increasing thecompression ratio. The results obtained with the numerical study using the createdmodel are guiding for engine designers.

PDF

___

1. IARC Working Group, “ Diesel and Gasoline Engine Exhausts and Some Nitroarenes”, IARC Monographs on the Evaluation of Carcinogenic Risks to Humans. IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, 105, 9, 2014.
2. Reif, K., “ Diesel engine management”, Springer Vieweg, 2014.
3. Arabacı, E., “Thermodynamic analysis of endoreversible six-stroke Otto cycle with respect to equivalence ratio, residual gas fraction and mean piston speed”, International Journal of Automotive Engineering and Technologies, 8-1, 1-10, DOI: 10.18245/ijaet.500789, 2019.
4. Kaushik, S.C., Tyagi, S.K., Kumar, P., “Finite time thermodynamics of power and refrigeration cycles”. Springer International Publishing, 2017.
5. Ebrahimi, R., “Effect of Volume Ratio of Heat Rejection Process on Performance of an Atkinson Cycle”, Acta Physica Polonica A, 133, 201-205, DOI:10.12693/APhysPolA.133.201, 2018.
6. You, J., Chen, L., Wu, Z., Sun, F., ”Thermodynamic performance of Dual-Miller cycle (DMC) with polytropic processes based on power output, thermal efficiency and ecological function”, Science China Technological Sciences, 61, 453-463, DOI:10.1007/s11431-017-9108-2, 2018.
7. Ge, Y.L., Chen, L., Sun, F.R., “Ecological Optimization of an Irreversible Otto Cycle With Variable Specific Heats of Working Fluid”, Proceedings of the Chinese Society of Engineering Thermophysics on Engineering Thermophysics and Energy Utility, Wuhan, China, 5-7, DOI: 10.1615/TFEC2017.fna.018308, 2011.
8. Ebrahimi, R., “Effects of mean piston speed, equivalence ratio and cylinder wall temperature on performance of an Atkinson engine” Mathematical and Computer Modelling, 53, 1289-1297, DOI:10.1016/j.mcm.2010.12.015, 2011.
9. Ebrahimi, R., “Thermodynamic Modeling of an Atkinson Cycle with respect to Relative Air-Fuel Ratio, Fuel Mass Flow Rate and Residual Gases”, Acta Physica Polonica, A., 124, 29-34, DOI:10.12693/APhysPolA.124.29, 2013.
10. Ge, Y., Chen, L., Sun, F., Wu, C., “Thermodynamic simulation of performance of an Otto cycle with heat transfer and variable specific heats of working fluid”, International Journal of Thermal Sciences, 44, 506-511, DOI:10.1016/j.ijthermalsci.2004.10.001, 2005.
11. Gonca, G., “Comparative performance analyses of irreversible OMCE (Otto Miller cycle engine)-DiMCE ( Diesel miller cycle engine)-DMCE (Dual Miller cycle engine)” Energy, 109, 152-159, DOI:10.1016/j.energy.2016.04.049, 2016.
12. Zhao, Y., and Chen, J., “An irreversible heat engine model including three typical thermodynamic cycles and their optimum performance analysis” International Journal of Thermal Sciences, 46, 605-613, DOI:10.1016/j.ijthermalsci.2006.04.005, 2007.
13. Dobrucali, E., “The effects of the engine design and running parameters on the performance of an Otto–Miller Cycle engine”. Energy, 103, 119-126, DOI:10.1016/j.energy.2016.02.160, 2016.
14. Gonca,G., Sahin, B., Ust, Y., “Performance maps for an air-standard irreversible Dual–Miller cycle (DMC) with late inlet valve closing (LIVC) version” Energy, 54, 285-290, DOI:10.1016/j.energy.2013.02.004, 2013.
15. Gonca, G., and Sahin, B., “The influences of the engine design and operating parameters on the performance of a turbocharged and steam injected Diesel engine running with the Miller cycle”, Applied Mathematical Modelling, 40, 3764-3782, DOI: 10.1016/j.apm.2015.10.044, 2016.
16. Gonca, G., and Dobrucali, E., “Theoretical and experimental study on the performance of a Diesel engine fueled with Diesel–bio Diesel blends”, Renewable Energy, 93, 658-666, DOI:10.1016/j.renene.2016.03.037, 2016.
17. Gonca, G., “Effects of engine design and operating parameters on the performance of a spark ignition (SI) engine with steam injection method (SIM)”, Applied Mathematical Modelling, 44, 655-675, DOI:10.1016/j.apm.2017.02.010, 2017.
18. Hernández, A.C., Roco, J.M.M., Medina, A., Velasco, S., “An irreversible and optimized four stroke cycle model for automotive engines”, European Journal of Physics, 17, 11, 1996.
19. Ferguson, C. R., Kirkpatrick, A. T. “Internal combustion engines: applied thermosciences”, John Wiley & Sons, 2015.
20. Pulkrabek, W. W. “Engineering fundamentals of the internal combustion engine”, Pearson, 2004.
21. Chase, M. W., Davies, C. A., Downey, J. R., Frurip, D. J., McDonald, R. A., Syverud, A. N. “NIST JANAF Thermochemical Tables ver. 1.0”. US Dept. of Commerce, 1985.
22. Boles, M., Cengel, Y. "Thermodynamics: an engineering approach”. New York: McGraw-Hil l Education, 2014.
23. Arabacı, E., “Simulation and performance analysis of a spark ignition engine using gasoline and LPG as fuel”, Journal of the Faculty of Engineering and Architecture of Gazi University, 36:1, 447-457, 2021.
24. Merker, G. P., Schwarz, C., Stiesch, G., Otto, F. “Simulating Combustion: Simulation of combustion and pollutant formation for enginedevelopment”. Springer Science & Business Media, 2005.
25. Özdalyan B., Orman R.Ç., “Experimental Investigation of the Use of Waste Mineral Oils as a Fuel with Organic-Based Mn Additive”. Energies. 11(6):1512, DOI: 10.3390/en11061512, 2018.

International Journal of Automotive Engineering and Technologies-Cover

Başlangıç: 2012
Yayıncı: Murat CİNİVİZ

Arşiv