The analysis of the calculation process related to labyrinth sealing with extraction

• Autorzy: Joachimiak D. , Joachimiak M. , Krzyślak P.

Identyfikatory

DOI

10.2478/ijame-2013-0066

• Języki publikacji: EN

Abstrakty

EN

The work presents a calculation process enabling one-dimensional numerical calculations of labyrinth sealing. A DSV program determines the thermodynamic parameters of gas in the sealing chambers with extraction. The influence of the sealing length upon the stability of a matrix solution of the system of equations with the use of Cond(C) parameter is analysed. Next, the operation of the software extended with a module that enables determination of the initial pressure p0, to which the assumed mass flow for a set geometry and sealing length would correspond is discussed. The work analyzes Cond(C) and initial pressure values for various sealing lengths with an assumed leak value. The work also compares the values of static pressures on the extraction plane, as obtained from the measurements, to theoretically calculated values. The calculations and comparisons were made for various heights of incomplete sealing fissures.

Słowa kluczowe

EN

labyrinth seals; turbomachines; fluid-flow machines; method of calculation labyrinth seals

PL

maszyna wirnikowa; maszyna przepływowa; uszczelnienie

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2013
• Tom: Vol. 18, no. 4
• Strony: 1057--1066
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr.

Twórcy

autor

Joachimiak D.

• Poznan University of Technology, Chair of Thermal Engineering ul. Piotrowo 3, 60-965 Poznań, POLAND

autor

Joachimiak M.

• Poznan University of Technology, Chair of Thermal Engineering ul. Piotrowo 3, 60-965 Poznań, POLAND

autor

Krzyślak P.

• Poznan University of Technology, Chair of Thermal Engineering ul. Piotrowo 3, 60-965 Poznań, POLAND

Bibliografia

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• Gamal Eldin A.M. (2007): Leakage and rotordynamic effects of pocket damper seals and see-through labyrinth seals - Dissertation, Texas A&M University, USA, December.
• Joachimiak D. (2013a): The Labyrinth Seals Research With Extraction (in Polish). - Dissertation, Poznan University of Technology.
• Joachimiak D. and Krzyślak P. (2011): Calculation of labyrinth seals with extraction. - International Journal of Applied Mechanics and Engineering, vol.16, No.1, pp.5-14.
• Joachimiak D., Joachimiak M. and Krzyślak P.(2013b): Description program Dlawnica used for calculations labyrinth seals (in Polish). - Journal of Mechanical and Transport Engineering, No.65, pp.25-35.
• Kosma Z. (2008): Numerical Methods in Engineering Applications (in Polish). - Radom: University Press.
• Krzyślak P. and Winowiecki M. (2008): A method of diagnosing labyrinth seals in fluid-flow machines. - Polish Maritime Research, No.3 (57), vol.15, pp.38-41, 10.2478/v10012-007-0081-2.
• Krzyślak P. and Winowiecki M. (2006): RP Patent Office: P-379431 - Acknowledgement of patent submission. Flow seal in a fluid-flow machine and method of its diagnostics (in Polish), Warsaw.
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• Tipton D.L., Scott T.E. and Vogel T.E. (1985): Analytical and Experimental Development of a Design Model for Labyrinth Seals. - Air Force Wright Aeronautical Laboratories, Allison Gas Turbine-Division of General Motors Corporation.
• Trütnovsky K. (1964): Berührungsfreie Dichtungen, Grundlagen und Anwendungen der Strömung durch Spalte und Labyrinthe. - VDI-Verlag bh Düsseldorf, Verlag des Vereins Deutscher Ingenieure.
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