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

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

REFERENCES (13)

Anker J.E., Mayer J.F. and Casey M.V. (2012): Impact of rotor labyrinth seal leakage flow on the loss generation in an axial turbine engineering. - International Journal of Power and Energy Systems. - Procedings of the Institution of Mechanical Engineers, vol.219, Part A, pp.481-490.

Google Scholar

Bjorck A. and Dahlquist G. (1987): Numerical Methods (in Polish). - Warsaw: PWN.

Google Scholar

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.

Google Scholar

Joachimiak D. (2013a): The Labyrinth Seals Research With Extraction (in Polish). - Dissertation, Poznan University of Technology.

Google Scholar

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.

Google Scholar

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.

Google Scholar

Kosma Z. (2008): Numerical Methods in Engineering Applications (in Polish). - Radom: University Press.

Google Scholar

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.

Google Scholar

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.

Google Scholar

10.

Maćkiewicz A. (2002): Linear Algebra Algorithms, Direct Methods (in Polish). - Poznan University of Technology Press.

Google Scholar

11.

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.

Google Scholar

12.

Trütnovsky K. (1964): Berührungsfreie Dichtungen, Grundlagen und Anwendungen der Strömung durch Spalte und Labyrinthe. - VDI-Verlag bh Düsseldorf, Verlag des Vereins Deutscher Ingenieure.

Google Scholar

13.

Winowiecki M. (2009): The Method of Diagnosing Labyrinth Seals On Machines (in Polish). - Dissertation, Poznan: University of Technology.

Google Scholar

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