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Wyświetlanie 1-15 z 93
Tytuł:
A method for evaluating theoretical and real operation of diesel engines in energy conversion formulation taking into account their operating indices
Autorzy:
Girtler, J.
Powiązania:
https://bibliotekanauki.pl/articles/260600.pdf
Data publikacji:
2011
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
operation
energy
diesel engine
ship’s main engine
Opis:
The article proposes valuating the operation of an arbitrary diesel engine, based on the sample case of a ship’s main engine in which energy conversion processes take place in a given time. The above operation is understood as the energy transfer to the screw propeller in the given time in which the energy conversion into work and/or heat and its further transmission take place. The here proposed method for evaluating the operation of the main engines installed in marine power plants consists in comparing the operation of these engines to a physical quantity the measuring unit of which is the joule-second (joule×second). A new term is introduced which bears the name of the theoretical engine operation and is the standard (ideal) operation which can be compared to the operation of real engines revealing different levels of wear. It was shown that the calculations of the theoretical operation defined in the above way cannot make direct use of commonly known theoretical Diesel and Sabathe cycles. Instead they should use the cycles modified by heat abstraction taking place in accordance with the isobaric, or isothermal process. Other new terms introduced in the article are: the degree of excellence of energy conversion to work, considered as the measure of excellence of engine operation, and the degree of engine operation dissipation, being the measure of its real operation. It is shown that if in time t of engine operation the case takes place that: Li = idem and Le = idem, then the engine operation dissipation is equal to its mechanical efficiency.
Źródło:
Polish Maritime Research; 2011, 3; 31-36
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A review of human error in marine engine maintenance
Autorzy:
Islam, R.
Anantharaman, M.
Khan, F.
Garaniya, V.
Powiązania:
https://bibliotekanauki.pl/articles/116425.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
engine room maintenance
human error
marine engine
marine engine maintenance
maritime safety
ship maintenance
maintenance activity
onboard maintenance
Opis:
Maritime safety involves minimizing error in all aspects of the marine system. Human error has received much importance, being responsible for about 80% of the maritime accident worldwide. Currently, more attention has been focused to reduce human error in marine engine maintenance. On-board marine engine maintenance activities are often complex, where seafarers conduct maintenance activities in various marine environmental (i.e. extreme weather, ship motions, noise, and vibration) and operational (i.e. work overload and stress) conditions. These environmental and operational conditions, in combination with generic human error tendencies, results in innumerable forms of error. There are numerous accidents that happened due to the human error during the maintenance activities of a marine engine. The most severe human error results in accidents due to is a loss of life. Moreover, there are other consequences too such as delaying the productivity of marine operations which results in the financial loss. This study reviews methods that are currently available for identifying, reporting and managing human error in marine engine maintenance. As a basis for this discussion, authors provide an overview of approaches for investigating human error, and a description of marine engine maintenance activities and environmental and operational characteristics.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 1; 43-47
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simulation model of energy distribution in ship combustion engine
Autorzy:
Nguyen, H.
Powiązania:
https://bibliotekanauki.pl/articles/259168.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
computer simulation
ship diesel engine
dynamic processes
energy balance and distribution
Opis:
In the paper a model of energy flow and distribution in ship diesel engine cylinder was presented. This is a model of discrete parameters, being a continuation of the author s research on simulation of energy processing within ship main propulsion engine [2,3]. The model in question makes it possible to calculate energy flow values delivered and transferred during every working cycle of the engine cylinder. Results of application of the model for 6ZA40S Sulzer engine installed on B672 ship were also attached. The results were compared with results of test-stand measurements of the engine, performed at different load levels.
Źródło:
Polish Maritime Research; 2005, 1; 22-26
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Step by Step Approach for Evaluating the Reliability of the Main Engine Lube Oil System for a Ships Propulsion System
Autorzy:
Anantharaman, M.
Khan, F.
Garaniya, V.
Lewarn, B.
Powiązania:
https://bibliotekanauki.pl/articles/116248.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Ship Propulsion
Main Engine
Main Propulsion
Lubricating Oil System
Markov Analysis
reliability
Propulsion System
Engine Lube Oil System
Opis:
Effective and efficient maintenance is essential to ensure reliability of a ship's main propulsion system, which in turn is interdependent on the reliability of a number of associated sub- systems. A primary step in evaluating the reliability of the ship's propulsion system will be to evaluate the reliability of each of the sub- system. This paper discusses the methodology adopted to quantify reliability of one of the vital sub-system viz. the lubricating oil system, and development of a model, based on Markov analysis thereof. Having developed the model, means to improve reliability of the system should be considered. The cost of the incremental reliability should be measured to evaluate cost benefits. A maintenance plan can then be devised to achieve the higher level of reliability. Similar approach could be considered to evaluate the reliability of all other sub-systems. This will finally lead to development of a model to evaluate and improve the reliability of the main propulsion system.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 367-371
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on applying the Catfish Biofuel in The Mekong Delta for The Marine Diesel Engine
Autorzy:
Quan, P. W.
Phuoc, H. T.
Powiązania:
https://bibliotekanauki.pl/articles/115953.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Ship Propulsion
marine diesel engine
Catfish Biofuel
Mekong Delta
diesel oil
Exhaust Gas
Petrol Oil Replacement
biofuel
Opis:
The manufacturing of Catfish products has been developed rapidly in the Mekong delta. Every year, about 1.2 million tons of Catfish and 150,000 tons of biofuel are produced. The biofuel B100 manufactures in Mekong delta satisfies the America standard ASTM D6751; EURO EN 14214 or Vietnamese standard TCVN 7717. Mekong delta, a lower land area, has a large inland water way system with around 100.000 river boats that operate with marine diesel engine. Using the biofuel for the marine diesel engine in area will reduce the HC, CO, SOx and NOx emission to the environment. Therefore, with a study on applying the catfish biofuel, it will reduce the climate change by the increasing of sea water level and save energy by using green energy to replace petrol oil.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 4; 523-529
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An attempt at applying machine learning in diagnosing marine ship engine turbochargers
Autorzy:
Adamkiewicz, Andrzej
Nikończuk, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2200936.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
machine learning
compressor diagnosis
marine ship engine
operational decision
neural
network
Opis:
The article presents a diagnosis of turbochargers in the supercharging systems of marine engines in terms of maintenance decisions. The efficiency of turbocharger rotating machines was defined. The operating parameters of turbocharging systems used to monitor the correct operation and diagnose turbochargers were identified. A parametric diagnostic test was performed. Relationships between parameters for use in machine learning were selected. Their credibility was confirmed by the results of the parametric test of the turbocharger system and the main engine, verified by the coefficient of determination. A particularly good fit of the describing functions was confirmed. As determinants of the technical condition of a turbocharger, the relationship between the rotational speed of the engine shaft, the turbocharger rotor assembly and the charging air pressure was assumed. In the process of machine learning, relationships were created between the rotational speed of the engine shaft and the boost pressure, and the indicator of the need for maintenance. The accuracy of the maintenance decisions was confirmed by trends in changes in the efficiency of compressors.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 4; 795--804
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of catalitic reactors usefulness to reduce pollution generated by piston combustion engines with regard to ship main engines
Autorzy:
Zielińska, E.
Girtler, J.
Lejda, K.
Powiązania:
https://bibliotekanauki.pl/articles/260376.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship engine
catalytic reactor
catalytic reactor efficiency
harmful compounds
Opis:
The article presents results which indicate that the use of catalytic reactors to reduce emissions of harmful compunds contained in the exhaust gas is important in the operation of vehicle motors operation. Efforts of the shipbuilding industry to reduce the toxicity of exhaust gas emitted by the main engines have been indicated and pointed to the desirability of the use of these catalysts in maritime transport. It has been pointed out that studies of the harmful substances in exhaust gases performer at vehicle inspection stations have an impact on increasing the safety of drivers and other road users and contribute to preserving the natural environment by reducing the danger coming from cars operating on Polish roads. An opinion has been expressed that the most serious threats to the environment are emitted by car transport exhaust fumes, which are characterized by significant emission of toxic compounds excreted into the atmosphere from tailpipe emissions. It has been demonstrated that a fully functioning catalytic reactor, operating in a steady state at appropriate temperatures and the composition of the mixture close to stoichiometric ratio, can reduce emissions of carbon monoxide, hydrocarbons and nitrogen oxides by more than 90%. Also, an assessment has been presented reporting the efficiency of catalytic reactors of spark ignition engines operating in a test vehicle inspection station. The results of research in the evaluation of their performance were correlated with their operation waveforms. Such an approach is justified by the fact that during the operation of each vehicle the wear of its assemblies and components is different – including the catalytic reactor. The catalytic layer undergoes aging so that there are changes in the structure and chemical composition of the catalyst bed, while the overlapping of layers of different chemical compounds that block access to the active layer of the reactor. An opinion has also been expressed that it would be advisable to take steps to use research results presented in this article for research of catalytic reactors similar use in diagnostic systems of marine combustion engines, especially the main ones, which exhaust emissions are incomparably greater than in the case of car engines.
Źródło:
Polish Maritime Research; 2017, 1; 81-87
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assesment of operation of ship main diesel engine using the theory of semi-Markovian and Markov processes
Autorzy:
Rudnicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/245616.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
operations
ship power plant
diesel engine
semi-Markov processes
Opis:
Operation of ship propulsion system is associated with realization of definite operational goals. If to elements of the system the operational reliability strategy could be applied, the situation would be very simple as existing conditions would unambiguously determine application of means being on hand. However decision to reject application of the strategy (even if hypothetical) becomes obvious with a view of necessity of ensuring an acceptable level of safety to ship and environment as well as presence of associated formal and legal limitations. Therefore complexity of operational reality makes that means intended for operation may be used in various ways. Objectivity and rationality in making decision, assumed optimal in given conditions, forces to apply an evaluating (quantitative) approach to the problem, hence to search for such their parameters (indices) which, in a given decision situation, can be deemed most adequate. To precisely determine the task it is necessary to specify also its duration time, apart from conditions in which it will be realized. When considering propulsion engine, i.e. the main element of ship propulsion system, especially important becomes not only the problem which amount of energy could be at one's disposal but also within which time interval it could be delivered. Therefore apart from applying the commonly used reliability indices, it seems sensible to consider the operation in such evaluating approach as it could be determined by energy and time simultaneously.
Źródło:
Journal of KONES; 2009, 16, 3; 325-333
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of ship steering gear load based on an analysis of rudder angle signal
Ocena obciążenia maszyny sterowej statku na podstawie analizy sygnału wychylenia steru
Autorzy:
Stefanowski, A.
Zwierzewicz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/359688.pdf
Data publikacji:
2012
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
automatyczne sterowanie statkiem
maszyna sterowa statku
bezpieczeństwo statku
automatic control of ship
steering engine of the ship
safety of the ship
Opis:
This paper presents observations and remarks on the work of ship's steering gear controlled by the autopilot in high seas. Attention is drawn to the insufficient power of steering gear operated by the autopilot in high waves and the consequent possibility of overloading and damage to the gear, creating a threat to the ship. Standard safeguards against damage are discussed. It is suggested that the alarm system should be extended to indicate the load of steering gears. The authors propose a method for assessment of the steering gear load by using a signal that is a nonlinear function of the actual rudder angle, based on the solution used in TS-type autopilot adaptation blocks. The results of computer simulations to obtain such signals for autopilot-controlled ship movement in irregular waves (sea state ranging from 3 to 6) are presented. The conclusion reached is that the signal can be used to assess the steering gear load, which may contribute to increasing ship’s safety in high sea states.
W artykule przedstawiono uwagi o pracy maszyn sterowych statków w wysokich stanach morza sterowanych autopilotem. Zwrócono uwagę na niewystarczającą moc maszyn sterowych dla pracy z autopilotem w tych stanach i możliwość ich przeciążania, uszkodzenia i wprowadzenia zagrożenia dla statku. Omówiono standardowe zabezpieczenia przed uszkodzeniem, wskazując na potrzebę rozszerzenia sygnalizacji alarmowej o układ wskazujący obciążenie maszyn sterowych. Przedstawiono propozycję wykorzystania do oceny obciążenia maszyn sterowych signal będącego nieliniową funkcją rzeczywistego kąta wychylenia steru bazującego na rozwiązaniu stosowanym w blokach adaptacji autopilota TS. Przedstawiono wyniki symulacji komputerowych uzyskiwania takiego signal dla realizacji prowadzenia statku autopilotem na nieregularnej fali przy stanie morza 3, 4, 5, 6. We wnioskach stwierdzono, że signal taki może służyć do oceny obciążenia maszyn sterowych, co może przyczynić się do zwiększenia bezpieczeństwa eksploatacji statku w wysokich stanach morza.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 30 (102); 126-131
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania wpływu struktury elektrowni gazowo-parowych na charakterystyki sprawności
The Influence of the Structure of a Gas-And-Steam Power Station on the Characteristics of Efficiency
Autorzy:
Kotowicz, J.
Chmielniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/359427.pdf
Data publikacji:
2006
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
turbina gazowa
układy gazowo-parowe
EXPLO-SHIP 2006
gas turbine engine
combined cycle
Opis:
W artykule przedstawiono dwie metodologie określania sprawności elektrowni gazowo-parowych. Dla każdej metodologii przedstawiono przykłady obliczeniowe. Opracowane metodologie pozwalają wyznaczyć sprawność badanych układów w funkcji temperatury na wlocie do turbiny gazowej i stopnia sprężania przy optymalnej części parowej układu. Obliczenia wykonano dla różnych struktur elektrowni: z kotłem jednociśnieniowym, dwuciśnieniowym z przegrzewem i bez przegrzewu międzystopniowego oraz trójciśnieniowym z przegrzewem międzystopniowym.
The paper deals with two methods of determining the efficiency of combined gas-and-steam power stations. For each of them examples of calculations have been quoted. These two methods permit to determine the efficiency of investigated systems as a function of temperature at the inlet to the gas turbine and the compression ratio for the optimal steam part of the system. Calculations have been carried out concerning various structures of power stations with a single-pressure waste-heat boiler, a double-pressure waste-heat boiler with and without reheat and a triple-pressure waste-heat boiler and reheat.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 273-286
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Causality in models of thermal processes in ship engine rooms with the use of Bond Graph (BG) method
Autorzy:
Cichy, M.
Kneba, Z.
Kropiwnicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/258502.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Bond Graph (BG) method
causality
ship engine room
energy system modeling
Opis:
With a single approach to modeling elements of different physical nature, the method of Bond Graph (BG) is particularly well suited for modeling energy systems consisting of mechanical, thermal, electrical and hydraulic elements that operate in the power system engine room. The paper refers to the earlier presented [2] new concept of thermal process modeling using the BG method. The authors own suggestions for determining causality in models of thermal processes created by the said concept were given. The analysis of causality makes it possible to demonstrate the model conflicts that prevent the placement of state equations which allows for the direct conduct of simulation experiments. Attention has been drawn to the link between the energy systems models of thermal processes with models of elements of different physical nature. Two examples of determining causality in models of complex energy systems of thermal elements have been presented. The firs relates to the electrical system associated with the process of heat exchange. The second is a model of the mechanical system associated with the thermodynamic process.
Źródło:
Polish Maritime Research; 2017, S 1; 32-37
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charging station location optimization of electric ship based on backup coverage model
Autorzy:
Zhang, W.
Yan, X.
Zhang, D.
Powiązania:
https://bibliotekanauki.pl/articles/117632.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
main engine
ship propulsion
charging station
electric ship
backup coverage model
electric ship energy
electric energy supply
ship charging station
Opis:
In terms of electric ship energy requirement in navigation, the ship charging station location is especially important. In this paper, a multi-period ship charging station location optimization model is pro-posed to make location decision in overall, from initial possible station sites chosen to the capacity determination for the final location sites. In the first phase, from the perspective of external environment, find out all possible ship charging station candidate sites through the feasible analyze. In the second phase, taking the ship charging demands into consideration, the final ship charging station sites can be selected among the candidate sites based on backup coverage model. In the last phase, regarding the cost of construction and service capability for different grade as the main factor in capacity determination, the optimal capacity of each final ship charging station are determined by means of optimization method. Finally, an example of Yanqi lake in China is used to verify the validity of the proposed methodology. The reasonable location of charging station could ensure the electric energy supply and avoid congestion caused by ship charging gathering. The model can be easily generalized to other problems regarding facility allocation based on user demand.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 2; 323-327
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of properties of marine Diesel engines run on two kinds of fuel using performance indicators
Porównanie właściwości silników okrętowych zasilanych dwoma rodzajami paliwa z wykorzystaniem wskaźników efektywności
Autorzy:
Adamkiewicz, A.
Deska, P.
Powiązania:
https://bibliotekanauki.pl/articles/360771.pdf
Data publikacji:
2011
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
wskaźniki efektywności
właściwości
morski silnik Diesla
układ napędowy
gazowiec
key performance indicators
properties
marine diesel engine
ship propulsion system
gas carrier
Opis:
Basing on the evolution of application of different kinds of fuel supplying main engines of gas carriers, this article justifies the need to compare the qualities of these engines. Mass-size, energy and energy-ecological effectiveness indicators have been defined. Properties of self-ignition engines run on one or two kinds of fuel have been considered. Values of key performance indicators have been estimated. On the basis of the identified sets of indicators, comparative analysis of a dual fuel engine with single fuel ones has been carried out.
Posługując się ewolucją zastosowania różnych rodzajów paliw zasilających silniki główne gazowców, w artykule uzasadniono potrzebę konfrontacji cech tych silników. Zdefiniowano wskaźniki efektywności masowo-gabarytowe, energetyczne i energetyczno-ekologiczne. Rozpatrzono cechy silników o zapłonie samoczynnym zasilanych jednym i dwoma rodzajami paliw. Oszacowano wartości kluczowych wskaźników efektywności. W oparciu o zidentyfikowane zbiory wskaźników przeprowadzono analizę porównawczą cech silnika dwupaliwowego z jednopaliwowymi.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2011, 28 (100) z. 1; 5-13
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Construction of the Ship’s Technical Failure Model to Assess its Navigational Safety
Autorzy:
Gucma, L.
Gralak, R.
Powiązania:
https://bibliotekanauki.pl/articles/116693.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Navigational Safety
Ship's Technical Failure
Marine Accidents
Human Factor
Safety Analysis
Steering Gear
Main Engine
Marine Simulator
Opis:
The ship technical failures contribution in overall number of navigational accidents are significantly smaller than those caused by human factor but in safety analysis they cannot be neglected. The paper presents methodology of modeling the technical failures of ships with respect of most important ship systems such as main engine, power generators and steering gear. The repair time is also taken into account. The data for simulation was obtained from analysis of ships statistical data of polish owners. The model could be used mostly in assessment with projecting phase of ship appliances, simulating owner’s economical analysis or generating random events in marine simulators.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2008, 2, 2; 173-176
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of location of Top Dead Centre and compression ratio value on the basis of ship engine indicator diagram
Autorzy:
Polanowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/258924.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Top Dead Centre
compression ratio
ship engine indicator diagram
Opis:
In the polytropic model of compression process, exponent of polytropic compression curve was replaced with a power polynomial in which the piston travel was used as its argument. It was shown that 3rd order polynomial is optimum one. In the model were taken into account the following: design parameters of cylinder, influence of cylinder wear and gas blow-by on compression process, error in determining the piston’s Top Dead Centre (TDC) location, measurement error due to indicator diagram’s truncation. The presented solution of the non-linear model is based on its partial linearization, use of the least squares method as well as on application of the optimum determination methods known in the theory of experiment. The model makes it possible to determine TDC location on indicator diagram dealing with combustion, determination of total compresion ratio, pressure value of indicator diagram truncation, as well as determination of maximum values of compression pressure on the diagrams in which self-ignition occurs before reaching the TDC.
Źródło:
Polish Maritime Research; 2008, 2; 59-64
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
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