Temat: Labyrinth - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Calculations of labyrinth seals with and without diagnostic extraction in fluid-flow machines
Autorzy:: Kaszowski, P.
Dzida, M.
Krzyślak, P.
Powiązania:: https://bibliotekanauki.pl/articles/259462.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: labyrinth seals
Fanno curve
diagnostic extraction
Opis:: Labyrinth seals are essential components of steam turbine unit constructions. Two types of labyrinth seals can be named, the first of which is the seal without diagnostic steam extraction, and the second – with extraction. The distribution of flow parameters along the packing is affected remarkably by the average seal clearance. The presence of diagnostic extraction leads to the equation system which is determinable and can be inversed to calculate the average seal clearance Si. Analysing the obtained results leads to the conclusion that the information about this parameter provides opportunities to monitor the current state of the packing in real time. The applied calculation procedure bases on the de Saint - Venant equation. The article also includes a brief description of both types of seals.
Źródło:: Polish Maritime Research; 2013, 4; 34-38
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: CFD analysis of fluid flow through the labyrinth seal
Autorzy:: Kaszowski, P.
Dzida, M.
Powiązania:: https://bibliotekanauki.pl/articles/175521.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: labyrinth seals
k-ǫ model
CFD calculations
fliud-flow machines
modeling
Opis:: Steam and gas turbines are essential to produce electricity. Since the launch of the first turbine in the world, there become a tendency to constantly achieve higher efficiency. There are many solutions to overcome losses in the working steam turbine. One of such methods is the use of seals. To determine thermodynamic parameters of steam, which prevail in the seal, we could use experimental methods or numerical calculations. Experimental researchs are too expensive and time consuming. Therefore, computational fluid dynamics (CFD) is increasingly used in the analysis of fluid flow through the labyrinth seal. The paper describes the results using CFD simulation software with the help of contained a computational k-ε model.
Źródło:: Transactions of the Institute of Fluid-Flow Machinery; 2015, 130; 57-69
0079-3205
Pojawia się w:: Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Analysis of the impact of mass flow extraction on the change of parameters in a labytinth seal using the Stodola method
Autorzy:: Kaszowski, P.
Dzida, M.
Powiązania:: https://bibliotekanauki.pl/articles/2073619.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: labyrinth seals
Fanno curve
diagnostic extraction
Stodola
uszczelnienie labiryntowe
krzywa Fanno
ekstrakcja diagnostyczna
Opis:: Labyrinth seals are an important element of a steam turbine set design. The use of diagnostic extraction makes it possible to control the operation of a seal by providing information on the thermodynamic parameters along the length of the seal. Diagnostic extraction has a considerable impact on the change of the parameters, the amount of the extracted mass. This article describes the dependence of pressure in the clearance downstream of the extraction and in the chamber in which the extraction point is located, on the amount of the extracted steam. Relation between pressure and nominal seal clearance is discussed, which enables the control of the seal operation. The calculations of the seal operation parameters were performed using a method proposed by Stodola.
Źródło:: Journal of Polish CIMEEAC; 2016, 11, 1; 55--67
1231-3998
Pojawia się w:: Journal of Polish CIMEEAC
Dostawca treści:: Biblioteka Nauki

Artykuł

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