Temat: opening pressure - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Evaluation of the influence of the opening pressure of a marine diesel engine injector on the results of numerical simulation of the working cycle and their comparison with the results of the laboratory experiment
Autorzy:: Puzdrowska, Patrycja
Powiązania:: https://bibliotekanauki.pl/articles/24202456.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: marine diesel engine
numerical simulation
diagnostic parameters
injector opening pressure
okrętowy silnik spalinowy
symulacje numeryczne
parametry diagnostyczne
ciśnienie otwarcia wtryskiwacza
Opis:: The article presents the results of a numerical simulation of the working process carried out in a diesel engine. In the applied utility program DIESEL-RK, the laboratory engine Farymann Diesel type D10 was implemented. A selected inoperability of its functional fuel supply system - reduced opening pressure of the injector pinj - was introduced. The values of adequate diagnostic parameters were determined: working gas temperature in the cylinder Tcyl, exhaust gas temperature Texh, combustion (flame) temperature Tcomb and concentration of nitrogen oxides in the exhaust gas NOx. Experimental tests were carried out on the experimental engine with the inoperative condition actually introduced, analogous to the numerical simulation, and the diagnostic parameters Texh and NOx were recorded. The results obtained by numerical simulation of the processes and during the active experiment on the experimental engine were compared.
Źródło:: Combustion Engines; 2023, 62, 2; 9--14
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of the macrostructure of the fuel spray atomized with marine engine injector
Autorzy:: Grochowalska, Joanna
Powiązania:: https://bibliotekanauki.pl/articles/133817.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: marine diesel engine
marine fuel injector
spray tip penetration
spray cone angle
opening pressure
back pressure
okrętowy silnik tłokowy
wtryskiwacz silnika okrętowego
penetracja strugi paliwa
kąt stożka strugi
ciśnienie otwarcia
ciśnienie wsteczne
Opis:: One of the main problem influencing the combustion process in the cylinder of the marine engine is an fuel spray phenomena. The parameters describing the shape of the fuel spray are named macro parameters. This article presents the research results of the macrostructure parameters of the fuel spray atomized with the marine engine injector. The research were carried out by optical visualization measurement method of Mie scattering. The diameter of nozzle injector was 0.375 mm and L/D coefficient 8.3. In these research were considered different parameters of injection opening pressures and backpressures in the constant volume chamber. Generally conlusions are: the opening pressure influence on maximum spray tip penetration, spray cone angle and influence on speed of the injected fuel. The increase of backpressure into the constant volume chamber causes the reduction of spray tip penetration and the increase of the spray cone angle.
Źródło:: Combustion Engines; 2019, 58, 4; 80-85
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The effect of fuel injection parameters on the combustion process in a self-ignition engine
Autorzy:: Imiołek, M.
Piętak, A.
Wierzbicki, S.
Powiązania:: https://bibliotekanauki.pl/articles/243984.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: injection pressure
injector opening time
fuel injection advance angle
Opis:: This paper presents the effect of the main parameters of fuel injection, such as injection angle and injector opening time, on the combustion process in a self-ignition engine. The study continues the research aimed at optimising the bi-fuel feeding of self-ignition engines with a main fuel dose of methane (CNG). The results described in the paper apply to a HATZ 1B40 one-cylinder engine, which was adapted for being powered with methane. Examinations of the engine powered with a pilot dose of mechanically-injected diesel oil revealed the necessity to adjust the fuel injection advance angle. To this end, the mechanical system offuel supply was replaced with a Common Rail, with controllable fuel injection pressure, fuel injection advance angle and injector opening time. The results presented in the paper show the characteristics of the injector output depending on the fuel pressure in the Common Rail and on the duration of the electric impulse which opens the injector. Moreover, the article presents examples of pressure courses in the combustion chamber at a constant fuel dose and with a different fuel injection advance angle. An example of the combustion pressure course at a constant fuel dose and variable injection pressure and injector opening time is given.
Źródło:: Journal of KONES; 2010, 17, 3; 143-148
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: CFD analysis of the impact of a cone opening angle parameter on the hydrodynamic lubrication of the conical slide bearing
Autorzy:: Czaban, A.
Powiązania:: https://bibliotekanauki.pl/articles/242697.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: hydrodynamic lubrication
slide bearing
conical bearing
cone opening angle
CFD
pressure distribution
Opis:: The height of the oil lubrication gap is the primary quantity that determines in simulations the operating parameters of a hydrodynamic slide bearing. It is influenced by multiple effects, such as vibrations during operation, varying load, misalignment between the shaft axis and the axis of the bearing sleeve, the roughness of the journal and sleeve surfaces, change in the viscosity value of lubricating oil caused by changes in temperature, pressure, shear rate or by oil ageing, wear of journal and sleeve surfaces etc. It is important to take into account such effects considering hydrodynamic lubrication simulations and design of the slide bearings. The one of the factors influencing the height of the oil lubrication gap of the conical slide bearing is the difference between the opening angle of the cone of bearing shaft and opening angle of the cone of bearing sleeve. The aim of this work is to investigate the impact of the difference between the values of these angles on the hydrodynamic lubrication of the conical slide bearing. The commercial CFD software Ansys Fluent, from the Ansys Workbench 2 platform, was used to determine the hydrodynamic pressure distributions, load carrying capacities and friction torques of the simulated bearings. It was assumed, that the bearings operate in a steady state conditions, the flow in the bearing lubrication gap is laminar and non-isothermal, there is no misalignment between the axis of bearing journal and axis of bearing sleeve, the surfaces of the journal and sleeve are smooth and lubricating oil acts as a liquid described by the Ostwald-de Waele power law model.
Źródło:: Journal of KONES; 2016, 23, 3; 71-77
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Effect of the parameters of pilot dose injection in a dual fuel diesel engine on the combustion process
Autorzy:: Wierzbicki, S.
Powiązania:: https://bibliotekanauki.pl/articles/246181.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diesel engine
injection pressure
injector opening time
fuel injection advance angle
course of combustion
Opis:: The paper presents the effect of the main parameters of pilot dose ignition: injection pressure, injection advance angle and injector opening time on the combustion process in a dual fuel diesel engine. The study continues the research conducted at the Department of Mechatronics of the University of Warmia and Mazury, Olsztyn, on optimisation of dual fuel self-ignition engines with CNG as the main fuel dose. The results presented in the paper were obtained with a single-cylinder engine HATZ 1B40, adapted to methane combustion. The results presented in the paper show the recorded changes of pressure in the combustion chamber with a constant fuel pilot dose and different ignition advance angles. Scheme of fuelling and measurement systems, view of engine indicating system, average changes of pressure in the combustion chamber, average changes of pressure in the combustion chamber and average changes of pressure in the combustion chamber at dual fuel engine supply with diesel oil at varied pilot dose injection angle, effects of advance angle of the pilot dose injection on the maximum pressure of combustion, at various proportions of diesel oil and CNG, average changes of pressure in the combustion chamber at double-fuel engine fuelled with diesel oil and various shares of methane in the dose powering the engine, CNG consumption as a function of the advance angle of the pilot dose injection for various shares of the pilot dose are presented in the paper.
Źródło:: Journal of KONES; 2011, 18, 3; 499-506
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Mechanical response of notched marble beams under bending versus acoustic emissions and electric activity
Autorzy:: Kourkoulis, S. K.
Pasiou, E. D.
Dakanali, I.
Stavrakas, I.
Triantis, D.
Powiązania:: https://bibliotekanauki.pl/articles/281055.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: marble
monuments
notch mouth opening displacement
three-point bending
pressure stimulated currents
acoustic emissions
3D-digital image correlation
Opis:: An experimental protocol, including the combined application of both innovative and traditional sensing techniques, is described aiming to explore the mechanical response of marble and also to check the possibilities of detecting precursor phenomena designating upcoming catastrophic fracture. The protocol consisted of three-point bending tests with notched prismatic beams made of Dionysos marble, the material extensively used for restoration of the Acropolis of Athens monuments. The sensing system improvised included techniques relying on completely different physical foundations, which permit simultaneous detection and recording of the Pressure Stimulated Currents, Acoustic Emissions, three dimensional displacement fields and Notch Mouth Opening Displacements. Analysis of the results revealed interesting features of the mechanical response of Dionysos marble and indicated, also, that classical Continuum Fracture Mechanics fails to describe accurately the response of marble, at least in the presence of notches. In addition, strong correlations between the Pressure Stimulated Currents, the rate of acoustic hits and the rate of change of the opening of the pre-existing notch have been enlightened. Moreover, the onset of catastrophic crack propagation appears following distinguishable changes of the Pressure Stimulated Currents recorded. Therefore (and taking into account the very small size of the respective sensors as well as the simple complementary equipment needed), it is concluded that the specific technique could be considered as a simple and reliable tool for an alternative approach to the in-situ Structural Health Monitoring of classical stone monuments.
Źródło:: Journal of Theoretical and Applied Mechanics; 2018, 56, 2; 523-547
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Przedłużenie eksploatacji elektrowni jądrowej Pickering w Kanadzie
Ontario, Canada: Pickering NGS extended operations
Autorzy:: Kulczyński, D. W.
Powiązania:: https://bibliotekanauki.pl/articles/214070.pdf
Data publikacji:: 2018
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: system CANDU
PHWR
rury ciśnieniowe
wiązki paliwowe
Calandria
basen składowania wypalonego paliwa
wycofanie z eksploatacji
stan bezpiecznego składowania
reorganizacja
optymalizacja obiektów jądrowych
NAOP
otwarcie rynku elektryczności
wypadnięcie z synchronizmu
Big Blackout
zielona energetyka
wzrost cen
CANDU system
Pressure Tubes
Fuel Bundles
Spent Fuel Bay
decommissioning
safe storage
reorganization
Nuclear Asset Optimization Plan
Electricity Market Opening
loss of synchronism
green energy
electricity rate increase
Opis:: W artykule omówiono przyszłość elektrowni jądrowej Pickering, najstarszej elektrowni jądrowej w Kanadzie, której w sierpniu 2018 r. Kanadyjski Urząd Dozoru Jądrowego (CNSC) udzielił zezwolenia na eksploatację do końca 2024 r. Przedstawiono także skróconą historię energetyki jądrowej w prowincji Ontario i wnioski, które mogą być przydatne dla Polski.
The article discusses the future of Pickering NGS, the oldest nuclear power plant in Canada. In August, 2018, the Canadian Nuclear Safety Commission – CNSC issued a new operating licence for Pickering Nuclear to run until 2024. The article includes condensed history of nuclear power in Ontario and presents conclusions that may be useful for Poland.
Źródło:: Postępy Techniki Jądrowej; 2018, 4; 25-29
0551-6846
Pojawia się w:: Postępy Techniki Jądrowej
Dostawca treści:: Biblioteka Nauki

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