Wszystkie pola: Rosłanowski, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Identification of ship propeller torsional vibrations
Autorzy:: Rosłanowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/242958.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transformation of energy
operation of engine
dimensional space
dimensional functions
Opis:: The article presents identification methods of ship propeller torsional vibrations in dimensional space and ways for their dumping. Propeller torsional vibrations are caused by static, dynamic and hydrodynamic unbalance of propeller itself and its operation in non-uniform velocity field of ship hull. The propeller working in uneven velocity field of the hull creates cyclic thrust forces, peripheral vibrations of shaft as well as flexural and torsional load of propeller shaft. Vibrations cause additional thrust load on shaft bearings and shaft bending moment. Vibrations of ship hull, particularly its stern section cause variation of pressure field created by propeller. Amplitude of particular parts of the hull comes from the action of cyclic forces created by working ship propeller. They can be very large. Therefore, the ways to reduce vibrations caused by running propeller are very important. Given in the article methods of vibration dumping calculations conduct to determination of vibration dumping coefficients. Calculation results are comparable to measuring results in spite of fact they were determined under assumption of different velocity fields of water flowing through propeller circle. Amplitudes of vibrations depend on number of propeller blades and pulsate with the basic frequency equal to product of the rotational speed and number of blades. Causes of such vibrations and additional load of vessel stern are described in the article. An attention was paid to assure the greatest possible uniformity of velocity field by adequate design of stern shape and accessories. The ways to reduce torsional vibrations of propeller by the appropriate selection of blades number and their accurately machining are also given in the article.
Źródło:: Journal of KONES; 2015, 22, 2; 177-184
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Parametric functions of ship propulsion engine operation
Autorzy:: Roslanowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/247696.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transformation of energy
operation of engine
dimensional space
dimensional functions
Opis:: The following article presents the method of determining the ship 's propulsion engine operation basing on the engines work parameters by means of dimensional analysis. The operation of engine is considered as effective energy transfer to ship propeller in the form of work during its operation. According to Girtler engine operation can be considered as, a new physical quantity of dimension Joul multiplied by second [2, 3J. A random type of combustion in engine cylinders makes possible to deal with engine operation as a random variable vectors in the Hilbert space isomorphic with dimension space. The analysis of stochastic engine workprocess is alternatively used as a set of determinist time functions by means dimension analysis. Parametric functions of engine work were determined on the basis of algebraic analysis scheme designed by S. Drobot. This scheme makes possible to control the correctness of conclusion rules regarding mathematics in digital functions describing operation of ship propulsion engine. Additionally the parametric form of function makes possible to investigate the influence of function parameters on correctness of engine operation. It makes possible to forecast the engine operation i given sailing conditions and to estimate steerability of ship during the voyage. It improves the safety of ship operation propelled by single engine propulsion plant.
Źródło:: Journal of KONES; 2010, 17, 4; 407-413
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Możliwości diagnozowania pomp wirowych za pomocą funkcji wymiarowych
The Possibility of Diagnosing an Impeller Pump by Means of Dimensional Functions
Autorzy:: Rosłanowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/360475.pdf
Data publikacji:: 2005
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: pompy wirowe
analiza wymiarowa
parametry diagnostyczne
OMiUO 2005
impeller pumps
dimensional analysis
diagnostic parameters
Opis:: W artykule przedstawiono możliwości diagnozowania pracy pomp wirowych za pomocą pomiarów: energii podnoszenia cieczy, wydajności i strat hydraulicznych. Wybrane parametry dają się wyrazić funkcjami wymiarowymi przekształconymi w funkcje liczbowe. Do przekształceń wykorzystano metody analizy wymiarowej. Otrzymane funkcje nadają się do dozorowania pracy pomp wirowych w instalacjach okrętowych.
This article presents possibilities of diagnosing an impeller pump by means of the measurement of liquid elevation energy, delivery of a pump and hydraulic losses. The selected parameters can be expressed by dimensional functions, which are transformable to algebraic functions. The method of dimensional analysis was used in the transformations. The obtained functions can be used for monitoring the work of an impeller pump in ship installations.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2005, 5 (77); 439-447
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Estimation of combustion process in cylinders of diesel engine based on its working achievements
Autorzy:: Roslanowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/246394.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: stochastic process of engine operation
energy transformation
periodogram of engine operation
diagnosis of heat generating process in engine cylinder
Opis:: 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.
Źródło:: Journal of KONES; 2010, 17, 2; 409-415
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Określenie zużycia paliwa przez silnik napędowy statku za pomocą analizy wymiarowej
Determination of Ship Main Engine Fuel Consumption by Means of Dimensional Analysis
Autorzy:: Rosłanowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/359435.pdf
Data publikacji:: 2006
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: zużycie paliwa przez silnik
EXPLO-SHIP 2006
parametry ruchu statku
analiza wymiarowa
engine fuel consumption
ship running parameters
dimensional analysis
Opis:: W artykule przedstawiono sposób określenia zużycia paliwa przez silnik spalinowy w oparciu o pomiary wykonane na statku. Wykorzystano przy tym schemat algebraiczny analizy wymiarowej zaproponowany przez Drobota. Wybrano optymalną bazę wymiarową funkcji zużycia paliwa przez silnik spalinowy w oparciu o kryterium najmniejszych kwadratów. Porównano metodę określenia funkcji zużycia paliwa z metodami tradycyjnie dotąd stosowanymi. Wskazano na zalety proponowanej metody.
This article presents a method of determination of the fuel consumption by a main propulsion diesel engine on the basis of sea trials measurements. An algebraic scheme of dimensional analysis proposed by Drabat was used for the purpose. The least squares method was chosen for the selection of optimum dimension data base. The proposed method of the determination of fuel consumption function is compared with traditional methods. Besides, advantages of proposed method are pointed out.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 345-354
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Operation of diesel engine in direct ship propulsion
Autorzy:: Rosłanowski, J.
Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/247108.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transformation of energy
engine performance
space-dimensional
dimensional feature
Opis:: In the paper an identification of low speed diesel engine operation in direct propulsion plant equipped with fixed pitch propeller during ship manoeuvring. It was starting of engine and gathering speed of ship. Analysis of engine operation was based on changes of engine torque and time of ship bring up to speed. Operation of reciprocating internal combustion engine consists in converting the supplied fuel energy and delivering it to ship propeller. This condition implicates converting different amounts of energy in different time. The main attention was given to operation of engine caused by crank pin forces in wide range of revolutions and their influence on mechanical load of ship propulsion plant. The torque is the major component determining the engine load. As a matter of fact its mean value is low, but a passing torque can be four times higher than the rated torque. The second important component of propulsion engine operation is the time of ship acceleration from one speed to another. It determines dynamic properties of the ship describing its reductional feature. This time is determined in dependence on other parameters characterizing operation of ship propulsion plant and ship motion by means of dimensional analysis. These parameters were regarded as dimension quantities of three-dimensional space. Thus the three independent in dimension parameters can be noted in digital form in dimensional functions. The knowledge of operation parameters of ship propulsion plant and the knowledge of ship motion dynamics makes possible rational manoeuvring. It increases safety of ship motion and failure-free operation of ship propulsion engine. The proper operation of engine requires delivery to the propeller such amount of energy, which ensure the motion of ship with required speed in given sailing conditions.
Źródło:: Journal of KONES; 2011, 18, 4; 413-420
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Load analysis of propulsion engine during ships speed acceleratio
Autorzy:: Rosłanowski, J.
Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/246664.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: load propulsion engine
ship's speed acceleration
control engine operation
running non-overload engine
Opis:: The following paper presents load analysis of propulsion engine during ship's speed acceleration. This process is carried out after manoeuvring in order to receive, as fast as possible, exploitation speeds of the ship, achieved during the voyage. The analysis concerns direct propulsion power system of low-speed engine of constant pitch propeller. Wrong steering process of engine load changes in temporary states, can cause engine overloading, as the result of its operation on the external limiting characteristic and can end up in engine seizure. Control of engine operation is carried on through selecting of adequate setting of rotational speed governor, which for specified external conditions can result in adequate position of fuel link and the choice of adequate fuel index arm dose. Equalization of the power delivered by the engine in given conditions of work with power required by the ship’s propeller cooperating with the hull, will establish adequate rotational speed of the engine and finally the speed of the vessel. In order to speed up the sip's motion, there must occur an overflow of propeller thrust over the required thrust (resistance) and this, in turn, is connected with the necessity to ensure the engine power surplus over the power required for a given range of operation or in other words sailing speed. This article presents the working model of ship propelling system during speed acceleration and concerns mainly nonoverload running of the engine. The model described above has been verified during tests in real conditions at sea.
Źródło:: Journal of KONES; 2012, 19, 2; 443-448
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Determination of nondimensional arguments in dimensional functions of ship propulsion engine operation
Autorzy:: Rosłanowski, J.
Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/246528.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ship propulsion engine operation dimensional analysis
dimensionless arguments in dimensional functions
Opis:: The following article describes different ways for determining dimensionless arguments in dimensional functions of ship propulsion engine operation. Dimensional space has also been characterized in relation to properties it possesses. An attention has been paid to the fact that it creates Abelian group, where involution fulfils multiplication axiom by scalar, and positive numbers that belong to dimensional space create dimensionless subspace. The conception of dimensional dependence has also been explained. There are also described conditions, which should be fulfilled by dimensional quantities to be dimensionally independent. Fundamental theorems of dimensional analysis have also been characterized. There is also given the definition of dimensional function of ship propulsion engine operation concerning values and dimensional arguments. It has been explained what requirements are to be fulfilled. One can also learn what limitations are imposed on dimensional function of ship propulsion engine operation concerning dimensional homogeneity and invariance. The ways of dimensional function transformation into a numerical one have been described. In addition, some conditions have been given which must be applied at given method of dimensional function transformation. An attention has been paid to the fact that dimensionless arguments are similarity invariant as a result of transformation by the similarity method of mathematical model of ship propulsion engine operation. In this study, the ship propulsion engine performance is expressed by product of Joule and second interpreted as transfer of energy in the form of work. Identification of ship propulsion engine operation by dimensional analysis performed in terms of its usefulness for diagnosis of ship propulsion engines. The basic problem of marine diesel exploitation is the monitoring of its technical condition. Diagnosis of marine diesel propulsion increases the safety of the ship and thus protects the marine environment against pollution.
Źródło:: Journal of KONES; 2015, 22, 2; 185-190
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Material consumption criteria of piston – con – rod elements system of combustion engine
Autorzy:: Rosłanowski, J.
Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/246321.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: criteria of mechanical and thermal load of the engine
tribological criteria of piston-crank combustion
engine system
Opis:: The following article includes the analysis of mechanical and thermal load criteria of combustion engine. Those criteria have been divided into tribological, technical in detail and technical in general. The above criteria have been related to piston-con-rod system, in which, two tribological centres were specified. One centre included, piston-piston rings and cylinder, in which, piston rings serve as labyrinth seal and the cylinder constitutes piston guides. Crank bearings and main bearings of engine crankshaft constitute the second centre. From the point of tribological view, piston-piston rings and cylinder constitute slide and thrust bearing lubricated hydrodynamically, while crankshaft bearings a-c-t as slide and journal bearings also lubricated hydrodynamically. In the description of thermal load of the above-mentioned tribological centres, special attention was paid to criteria that ensure their motion reliability and durability of engine operation. Whereas in the description of mechanical load of elements constituting investigated centres, some criteria were determined resulting from their functionality and fatigue strength of the material they were made of. Criteria of thermal loads were based on mean density flux of heat conducted through the walls of engine elements, paying attention to their low precision of evaluation. It has been emphasized that synthetic criteria indicators are the most precise. They are determined on the basis of engine load measurements during its operation. Those criteria allow us to describe the operating process of con-rod-piston diesel engines and at the same time it is possible to expose their technical condition which is of essential practical meaning. The wear process of tribological centres that takes place during operating in piston-con-rod system, affects the course of engine working process and its techno-economic indicators.
Źródło:: Journal of KONES; 2013, 20, 4; 397-403
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Symptoms of states included in the performance of con-rod-piston combustion engines systems
Autorzy:: Rosłanowski, J.
Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/243195.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: energetic operation of piston crank system
frequency of momentary values of the torque on the crankshaft
Opis:: The following article describes energetic states symptoms, included in correct and incorrect performance of crankpiston combustion engines systems. Special attention has been paid to accompanying processes of such performance, with regard to, heat generation effect in combustion chamber and friction in joined frictional movements. Combustion chamber is a moving space formed by connection of the piston through piston rings with the cylinder liner and the engine head. Heat generation process takes place above the piston, generated by burning of fuel. It causes an increase of gas pressure in the combustion space, which results in the movement of the piston tightened by the rings, followed by an increase of the space volume. In this way energy is emitted from fuel burning, influencing the elements of piston-conrod system in the form of heat and work. The ability of such thermodynamical system to convert energy into an effective one is limited. Internal energy of exhaust gases can be divided into the part which cannot be converted into work. The process of heat generation in engine cylinder is of irreversible character which results in the loss of energy. In piston combustion engines, work is performed by heat generated in cylinders. Energetic performance in piston-crank system results from internal exchange of exhaust gases in combustion chamber with the engine surroundings. Analysis of such energetic performances allows us to isolate symptoms of correct operation of piston con-rod combustion engine systems. Such symptoms include: exhaust gases temperature, temperature of piston surface, momentary values of torque and the speed of pressure increase during combustion. Piston-con-rod system is a component part of the engine. Evaluation of its performance allows to identify the present technical condition of the engine. Diagnostic advantages of some, above mentioned symptoms of piston-con-rod combustion engine operation, have been verified by means of adequate laboratory testing and during engine operation on the ship.
Źródło:: Journal of KONES; 2013, 20, 1; 279-286
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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