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    Wyświetlanie 1-4 z 4
    Tytuł:
    Pressure measurement in the cylinder of four-stroke marine engine - simulation analysis
    Autorzy:
    Cuper-Przybylska, Dominika
    Powiązania:
    https://bibliotekanauki.pl/articles/133664.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    marine engine
    combustion pressure
    indicator channel
    silnik wysokoprężny
    silnik okrętowy
    ciśnienie spalania
    Opis:
    The measurement of combustion pressure relies on connecting a pressure sensor to a four-stroke marine engine cylinder by a channel led out from the engine cylinder. The geometry of the channel distorts the results of combustion pressure measurements. The purpose of the work is to create a model of combustion processes in engine cylinders. The model uses a mathematical description of the indicator channel on one of the engine cylinders. The input data to the model and the data necessary for its verification came from the direct measurements on the research facility. The test object was a four-stroke Sulzer 3AL25/30 engine loaded by an electric power generator. During calculations, different diameters and lengths of measurement channel were simulated. The obtained results allowed to formulate the conclusion that the geometry of the measurement channel has a significant impact on the measurement results. The increase of the length of the measuring channel as well as the diameter of the channel causes disturbances in the measurement of the maximum pressure.
    Źródło:
    Combustion Engines; 2019, 58, 2; 36-39
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Marine diesels working cycle monitoring on the base of IMES GmbH pressure sensors data
    Autorzy:
    Neumann, Stefan
    Varbanets, Roman
    Kyrylash, Olena
    Maulevych, Vladyslav
    Yeryganov, Oleksiy
    Powiązania:
    https://bibliotekanauki.pl/articles/327592.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    diesel engine
    cylinder pressure monitoring
    top dead center
    gas pressure sensor
    Butterworth low-pass filter
    mean indicated pressure
    indicator valve channel
    silnik spalinowy
    czujnik ciśnienia
    monitorowanie
    wydajność
    Opis:
    The paper presents algorithms for marine diesel engines’ working process monitoring designed by analyzing data obtained with IMES pressure sensors. Main features and properties of IMES sensors, used for 2- and 4-stroke modern marine diesel engines, are presented here. The pressure-time diagrams were taken as a basis for creating algorithms for marine diesel engines’ working process monitoring. The task of preliminary calculation of top dead center position (TDC) of a cylinder was solved using polytropic compression equation. TDC position was calculated using the equation P' = 0. Then algorithm for calculating the average indicator pressure and the indicator power of the cylinder has been determined. The CFD methods show how indicator valve channel influences the results of marine diesel engines’ working process monitoring. With the example of compression curves in a cylinder, it’s shown amplitude and phase distortions introduced into pressure measurements by the indicator valve channel. Such research work is important and actual in time due to the use of marine diesel portable performance analysis systems.
    Źródło:
    Diagnostyka; 2019, 20, 2; 21-26
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected chemical indicators of water quality in the near bottom layer of the Pomeranian Bay close to the mouth of the Channel Swina between 1991-1994
    Autorzy:
    Poleszczuk, G.
    Sitek, S.
    Wolnomiejski, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/85173.pdf
    Data publikacji:
    2001
    Wydawca:
    Akademia Pomorska w Słupsku
    Tematy:
    chemical indicator
    water quality
    quality indicator
    bottom layer
    Pomeranian Bay
    Swina mouth
    Swina channel
    1991-1994 period
    water composition
    Baltic Sea
    Źródło:
    Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2001, 05
    1643-0115
    Pojawia się w:
    Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Formation of the Surface Runoff of the Rivers of the Carpathian Region during the Urbanization of Slope Areas
    Autorzy:
    Hnativ, Roman
    Yakhno, Oleh
    Hnativ, Ihor
    Powiązania:
    https://bibliotekanauki.pl/articles/24201783.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    anthropogenic load
    water object
    pollution of riverbed
    erosion process
    bottom sediment
    ecological indicator
    channel process
    Opis:
    Anthropogenic factors cause an increase in the impact on the natural system as a whole and its components. An increase in the intensity of this influence is predicted in the 21st century, and its forms are very diverse and unevenly distributed across the globe. This is most noticeable in industrialized countries, but at the same time this influence largely depends not only on the industrial potential and the level of technology, but also on the population density and urbanization of territories. Currently, much attention is being paid to the ecological problems of river catchments, which are significantly transformed as a result of technogenic influence on the natural environment. Surface runoff of water and sediments is usually formed in the river basin as slope runoff entering the river network. The river basin regulates the surface runoff formed as a result of atmospheric precipitation, which discretely falls on its surface, transferring a significant part of it into the underground runoff. The state of forest landscapes plays an important role in the formation of floods in the Dniester basin. The forest performs important ecological functions, including water protection and soil protection. Forests stabilize soils, preventing their erosion. The presence of a sufficient area of forests contributes to the regulation of surface runoff and the hydrological regime, the prevention of soil erosion and the stabilization of riverbeds. The use of water and mineral resources, construction on the banks of rivers and the laying of engineering communications through them are always different forms of artificial influence on the natural course of channel processes, which change it to varying degrees. Measures that change the channel-forming activity of the river, disrupt the flow of sediments, or radically change the hydraulic characteristics and structure of the flow have a particularly negative impact. The generalization of the dynamics of the channel process and ecological indicators within the territories of the Carpathian region will allow us to assess their impact on the state of the river network, the change in the quality of natural waters, and predict floods.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 5; 249--255
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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