Wszystkie pola: low-current discharge - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Doskonalenie modelu matematycznego niskoprądowego wyładowania elektrycznego
Improvement of a mathematical model of low-current discharge
Autorzy:: Didenko, V. P.
Powiązania:: https://bibliotekanauki.pl/articles/185875.pdf
Data publikacji:: 2014
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG
Tematy:: niskoprądowe wyładowania elektryczne
wyładowania elektryczne
model matematyczny
low-current discharge
discharge
mathematical model
Opis:: W artykule przedstawiono wyniki badań zależności długości wyładowania od czasu, a także określono i doprecyzowano współczynniki matematycznego modelu wyładowania łukowego.
The article presents the results of research concerning the dependence of the discharge duration on time. The coefficients of a mathematical model of arc discharge were identified and specified.
Źródło:: Mechanizacja i Automatyzacja Górnictwa; 2014, R. 52, nr 2, 2; 14-19
0208-7448
Pojawia się w:: Mechanizacja i Automatyzacja Górnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Discharge measurement and performance tests of hydraulic units in low-head small hydropower installations
Autorzy:: Steller, J.
Adamkowski, A.
Henke, A.
Janicki, W.
Kaniecki, M.
Krzemianowski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/175552.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hydropower
hydraulic unit
performance test
discharge measurement
current meter method
pressure-time method
Opis:: In course of over half a century the test teams of the Szewalski Institute of Fluid-Flow Machinery (IMP PAN) have conducted numerous performance tests of small hydropower (SHP) installations on various occasions and motivations, including updating or establishing performance characteristics of old machines, acceptance of new units, checking or optimising the cam correlation of new or refurbished double-regulated turbines, checking performance of prototype turbines under field conditions. The discharge measurement techniques have included currentmeter, pressure-time and acoustic methods. Index tests, using the Winter-Kennedy and other differential pressure methods, as well as current-meter and acoustic techniques, have been employed quite frequently to optimise the cam curves of double-regulated machines. In one case a simplified technique based solely on the power/wicket gate opening relationship was checked. This paper discusses some techniques applied when determining the absolute efficiency and optimizing cam correlations by means of absolute and index test methods. Cubic spline formulae as applied to integrate the flow velocity field in a hydrometric section are derived. Results of a discharge measurement by means of the current-meter and pressure-time method are compared as a special case study. Finally, practical recommendations addressed both to the power plant owners and the test team members are formulated.
Źródło:: Transactions of the Institute of Fluid-Flow Machinery; 2015, 130; 3-29
0079-3205
Pojawia się w:: Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Selected plasma nitriding methods usable for the thermo-chemical treatment of aircraft parts
Autorzy:: Grzesiak, G.
Zahorski, T.
Stypniak, M.
Walkowicz, J.
Jurczyszyn, R.
Powiązania:: https://bibliotekanauki.pl/articles/244738.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: plasma nitriding
aircraft part
Direct Current Plasma Nitriding
Low Pressure Nitriding in AEGD plasma
Low Pressure Nitriding in Arc Enhanced Glow Discharge plasma
active screen plasma nitriding
Opis:: The aim of the work was to review selected methods of plasma nitriding, which according to the authors might he used in the thermo-chemical treatment of aircraft parts. The introduction explains the nitriding process and presents the requirements on the thermo-chemical treatment of aircraft parts. Three methods of plasma nitriding have been described: Direct Current Plasma Nitriding (DCPN), Active Screen Plasma Nitriding (ASPN) and Low Pressure Nitriding in AEGD (Arc Enhanced Glow Discharge) plasma. While describing DCPN plasma nitriding method, authors drew attention to known problems, which occur in this process such as edge effect or hollow cathode effect. The Keller's model, the Marchand's model and the Walkowicz's model of nitriding process, which can be found in the literature, were also presented in this work. Another purpose of this work was to present hypotheses about the transportation of nitrogen during Active Screen Plasma Nitriding process and to show that in this nitriding method, defects typical for Direct Current Plasma Nitriding do not occur. While describing Low Pressure Nitriding in AEGD plasma, authors also presented the model of nitriding mechanism in this process, which shows four nitrogen diffusion paths (physisorption, chemisorption, adsorption ofNj, ion implantation). Examples of layers obtained by applying described nitriding methods were presented. The measurement ofnitrided layers confirmed that it is possible to obtain a layer without E film on the surface.
Źródło:: Journal of KONES; 2014, 21, 4; 145-152
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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