Wszystkie pola: Jankowska, M. A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of thermodynamical parameters of combustion engine working cycle
Autorzy:: Siemińska - Jankowska, B.
Ambrozik, A.
Jankowski, A.
Ślęzak, M.
Powiązania:: https://bibliotekanauki.pl/articles/246372.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engine
engine thermodynamics
engine working cycle
Opis:: Thermodynamics systems may be classified as isolated, closed, or open based on the possible transfer of mass and energy across the system boundaries. An isolated system is one that is not influenced in any way by the surroundings. This means that no energy in the form of heat or work may cross the boundary of the system. In addition, no mass may cross the boundary of the system. A thermodynamic system is defined as a quantity of matter of fixed mass and identity upon which attention is focused for study. A closed system has no transfer of mass with its surroundings, but may have a transfer of energy (either heat or work) with its surroundings. An open system is one that may have a transfer of both mass and energy with its surroundings. Described system being an object of the paper is an open system for some phenomena. An object the paper is the thermodynamical analysis of the filling process of the cylinder which occurs in calculated period from the percussion cap of the position the piston at TDC to it position at BDC, at constant average value of the pressure in the cylinder. During durations of the filling process of the cylinder, dirt of the working charge combustion products are not taken into account. One accepts that the quantity of the working charge in the established point placed on the compression line by piston BDC is equal quantity of the working charge in the end point of the filling process, answering to the start point of the real compression process. The state of the working charge in cylinder described is four parameters: a pressure, a temperature, quantity moles of the working charge and its volume. For appointment those parameters, earlier worked out dependences are put-upon.
Źródło:: Journal of KONES; 2007, 14, 3; 563-572
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis and research of piston working conditions of combustion engine in high thermal load conditions
Autorzy:: Jankowska-Sieminska, B.
Jankowski, A.
Slezak, M.
Powiązania:: https://bibliotekanauki.pl/articles/243400.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engine
piston
thermal load
thermal expansion
thermal shock
Opis:: Explanation of phenomena occurring in pistons of combustion engines which appear during heating and cooling processes in reference to standard materials and composite materials of high material proprieties is aim of the paper. Bring over researches were mostly directed on measurements of difference dimensions which appear during the piston work in the combustion engine. The paper concentrates on phenomenon of different proprieties of materials. The thermal stresses and shocks differ. In the thermal shock, thermal stresses are caused by instantaneous temperature gradients which appear at high engine speed. These stresses are determined thro temperature distribution and they do not differ from stresses in steady-state conditions. Researches concerning thermal expansions were performed by means of sensitive dilatometer which can work in simple and differential system. Changes of dimensions versus temperature function were measured with inductive sensor and the sensitive Pt-ptrh thermocouple, and results were referred to reference material-Platinum. Research results are illustrated on diagrams of different courses of changes of the of thermal expansion coefficient during heating and cooling of standard and composite materials. Values of the thermal expansion coefficient a for the heating and cooling are smaller for composite alloys. The course of the coefficient â during cooling can be higher or lower from the coefficient a during heating. Similar values were also received. Maximum differences were of 10%. Smaller values of the coefficient a for composite alloys cause that for such the same thermal loads temperature gradients will be smaller for composite alloys. Courses of changes of the coefficient â have a different characteristics suited from chemical composition of alloy, granularity of the composite component and thermal treatment.
Źródło:: Journal of KONES; 2007, 14, 3; 233-243
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Novel method appointing of the effective heat release coefficient during combustion process based on real indicator diagram
Autorzy:: Jankowski, A.
Ambrozik, A.
Jankowska-Sieminska, B.
Ślęzak, M.
Powiązania:: https://bibliotekanauki.pl/articles/244287.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engine
working cycle
thermodynamics
indicator diagram
heat release
Opis:: An object of the paper is a novel method of effective heat release coefficient appointing during combustion process of the based on the real indicator diagram. The process quality of the heat release during process of combustion is evaluated by value of the effective heat release coefficient. Accepted assumptions at appointing effective coefficient of heat release refer to acceptable that thermodynamical parameters of the working charge according to points of the real indicator diagram and the computational diagram are such the same, the maximum pressure of real working cycle of the engine is equal to the pressure of the computational cycle, work of the working charge performed in period from point of closing of the inlet valve to point of the beginning of the exhaust process are for both considered working cycles equal, heat values of the carried to the real and computational cycle are such the same. The method of appointing of the self-ignition delay period is presented in the paper, using to this end intersection point of two graphs of temperature course of the working charge prepared for the first phase of combustion process. Other methods appointing characteristics is suggested in paper basing on the real indicator diagram. The graphic illustration of the preparing method of characteristics of the relative quantity of the heat release during combustion process is illustrated in paper.
Źródło:: Journal of KONES; 2007, 14, 4; 133-142
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Driving school students' training with the use of module close to - as a method contributing to change in young drivers' attitude and reducing the number of road accident with their participation in Europe
Autorzy:: Wacowska-Ślęzak, J.
Wnuk, A.
Jankowska, D. M.
Powiązania:: https://bibliotekanauki.pl/articles/244015.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: road traffic safety
driving school courses
driving school students
drivers training
road accidents offenders
Opis:: The aim of the paper is to present the European Project "MODULE CLOSE TO". The project is executed in eleven European Union countries. The paper describes main objectives and guidelines of the project. The project's main result in the final stage should be the development of conditions for unification of drivers''training system across Europe by introducing into drivers' training new educational module. The module consists in realization of educational method called "peer-to-peer" during drivers' training, which is taken from addiction treatment prevention in which a peer reports on a problem to another peer. In drivers' training, the course participants are confronted with road accident offenders (course participants' peers) and their stories, which should lead to positive changes in attitudes and behaviours of young, beginning drivers and therefore to permanent reduction in number of both road accidents and their victims. The preliminary research confirmed that classes with road accident offenders have a positive influence on developing proper attitudes of young drivers. A discussion concentrated on offender, his/her susceptibility to risky behaviours, accident's circumstances, confrontation with its consequences and on serving an adjudged sentence makes an impression on young course participants. The project anticipates introduction of pilot classes in driving schools, high schools, etc. within the framework of drivers' training with participation of road accident offenders and also evaluation of its influence on course participants. The final effect of the project will be the development of conditions for introducing a new educational module into existing drivers' training system as well as developing conditions for recruiting accident offenders and actions motivating them to join the project realization.
Źródło:: Journal of KONES; 2008, 15, 2; 531-536
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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