Calculations of labyrinth seals with and without diagnostic extraction in ﬂuid-ﬂow machines

Paweł Bogumił Kaszowski; Marek Dzida; Piotr Krzyślak

Calculations of labyrinth seals with and without diagnostic extraction in ﬂuid-ﬂow machines

Abstract

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.

Authors (3)

Paweł Bogumił Kaszowski mgr inż.
Marek Dzida dr hab. inż.
Piotr Krzyślak dr hab. inż.
- Politechnika Poznańska, Wydział Maszyn Roboczych i Transportu Katedra Techniki Cieplnej

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: Polish Maritime Research no. 20, pages 34 - 38,
ISSN: 1233-2585
Language:: English
Publication year:: 2013
Bibliographic description:: Kaszowski P. B., Dzida M., Krzyślak P.: Calculations of labyrinth seals with and without diagnostic extraction in ﬂuid-ﬂow machines// Polish Maritime Research. -Vol. 20, iss. 4(80) (2013), s.34-38
Verified by:: Gdańsk University of Technology

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