A Simulation of Four Stroke Marine Diesel Engines to Predict Internal Cylinder Characteristics

Quang Vinh Nguyen1, , Van Vang Le2, Hong Duong Bui2
1 Naval Technical College, Ho Chi Minh City, Vietnam
2 Ho Chi Minh City University of Transport, Ho Chi Minh City, Vietnam

Main Article Content

Abstract

This paper introduces a simulation of four stroke marine diesel engines. The submodel of a particular cylinder was carried out, based on the first law of thermodynamics, programmed by Matlab/Simulink program, which describes the relations among internal characteristics, including: cylinder performance parameters, heat release, heat loss and pressure. The heat release is based on the Wiebe function and the heat loss is based on the Woschni function to build submodels. From the result of the model, the indicated pressure of a single cylinder was taken, the brake power of the engine could be estimated through this pressure. The object of the simulation is a new engine, hence the technical documents and test records provided by manufacturer are sufficient. The model got the input parameters from this and the key outputs of model (example the brake power, peak combustion pressure, specific fuel consumption) were compared with the test records to adjust and make it more accurate. These gaps were not over 5%, therefore, this model can be used to predict key complicated internal cylinder characteristics, for example the pressure, temperature, and thermal efficiency of engines.

Article Details

References

[1] Weibe, I., Semi-empirical expression for combustion rate in engines, in Proceedings of Conference on Piston Engines, USSR Academy of sciences, Moscow. 1956, USSR Academy of sciences, Moscow. p. 185-191.
[2] Woschni, Gerhard. A universally applicable equation for the instantaneous heat transfer coefficient in the internal combustion engine, No. 670931, SAE Technical Paper, 1967. https://doi.org/10.4271/670931
[3] Benson, R.S. and N.D. Whitehouse, Internal Combustion Engines. 1984: Elsevier Science & Technology Books.
[4] Heywood, John B., Internal combustion engine fundamentals, McGraw-Hill Education, 2018.
[5] Miyamoto, Noboru, et al., Description and analysis of diesel engine rate of combustion and performance using Wiebe's functions, SAE Transactions (1985): 622-633. https://doi.org/10.4271/850107
[6] Ferguson, C.R. and A.T. Kirkpatrick, Internal combustion engines: applied thermosciences. 2015: John Wiley & Sons.
[7] Eriksson, L. and L. Nielsen, Modeling and control of engines and drivelines. 2014: John Wiley & Sons. https://doi.org/10.1002/9781118536186
[8] Maftei, C., L. Moreira, and C.G. Soares, Simulation of the dynamics of a marine diesel engine. Journal of Marine Engineering & Technology, 2009. 8 (3), pp. 29-43. https://doi.org/10.1080/20464177.2009.11020225
[9] Hardenberg, H. O., and F. W. Hase., An empirical formula for computing the pressure rise delay of a fuel from its cetane number and from the relevant parameters of direct-injection diesel engines, SAE Transactions (1979), 1823-1834. https://doi.org/10.4271/790493