Estimation of combustion process in cylinders of diesel engine based on its working achievements

• Autorzy: Roslanowski J.
• Języki publikacji: EN

Abstrakty

EN

Elements of Modern ships' main combustion driven engines are subject to immense heat and mechanical loads. It is therefore advisable to supervise the regularity of heat generation in engine 's cylinder s. In order to diagnose the process of heat generation in engine's cylinder s, this article propagates the use of momentmetre. Described method allows estimating faulty combustion on the basis of autocorrelation of moment temporary values on the shaft after three successive rotations. The paper brings to attention how the work of diesel engine may be usedfor estimation of combustion process correctness in this engine cylinder. The work of diesel engine is connected with transfer of effective energy to ship propeller during its operation. Due to accidental naturę of combustion inside engine cylinder s it stochastic internally stationary process. To say more it is stochastic internally stationary process with ergodic feature. It makes possible to describe expected engine work by means of stochastic second order characteristics. They are autocorrelation functions and spectrum density of self power functions depending on time and frequency. Both above mentioned functions are uniquely connected with combustion in engine cylinders and it is possible to estimate the correctness of engine operation. It is also possible to estimate if the work of engine in given sail conditions is equal to reguirements of imposed tasks. If this reguirement is not met in the case of one propeller ship it can lead to the loss of ship stability and as a result can cause the ship sink.

Słowa kluczowe

EN

stochastic process of engine operation; energy transformation; periodogram of engine operation; diagnosis of heat generating process in engine cylinder

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 2
• Strony: 409--415
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Roslanowski J.

• Gdynia Maritime University, Faculty of Marine Engineering 81-87 Morska Street, 81-225 Gdynia, Poland,

Bibliografia

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• [2] Girtler, J., Conception of valuation of combustion engine operation, Journal of KONES Powertrain and Transport, Editorial Office Institute of Aeronautics BK, pp. 89-96, Warsaw 2008.
• [3] Girtler, J., Quantitative interpretation of energy-based systems and index of their reliability, Journal of Polish CIMAC, Vol. 3, No. 1, pp. 87-94, 2008.
• [4] Polanowski, S., Studium on methods and analysis of indicator diagrams in aspect of ship engine diagnosis, Scientific Journals, No.169A, Year XLVIII, Military Navy Academy, Gdynia 2007.
• [5] Roslanowski, J., The methodology of energetical process model construction in ship propulsion systems by means of dimensional analysis defining their dynamical features, International Conference Technical, Economic and Environmental Aspects of Combined Cycle Power Plants, pp. 59-66, Gdansk University of Technology 2004.
• [6] Roslanowski, J., Estimation of head generation in engines cylinders on the bases of autocorelation of rotatory moments temporary values, II International Scientifically Technical Conference Explo-Diesel & GasTurbine 2001, pp. 273-278, Gda􀄔sk-Miedzyzdroje-Kopenhaga 2001.
• [7] Roslanowski, J., An attempt to apply autocorrelation analysis into supervision of shipping combustion engine on the basis of changes in rotatory moment caused by the disturbances of fuel injection, Doctoral thesis, Posen Polytechnic 1982.
• [8] Weclawski, J., Dynamics of power-feed combustions engines, Publication of Gdansk Technical University, Gdansk 1995.
• [9] Collective work, Torsional Vibrations of ship propulsion units, Materials of Ship Technique Centre in Gdansk, Gdansk 1987.