Title of article :
Performance evaluation of trapezoidal teeth labyrinth seal
Author/Authors :
Abdous, Razie Aerospace Department - Semnan University, Semnan , Zirak, Saadat Mechanical Engineering Department - Semnan University, Semnan
Pages :
9
From page :
265
To page :
273
Abstract :
The present paper investigates the effects of the trapezoidal teeth labyrinth seal on the leakage amount in gas turbines. The influences of increasing the number of teeth from 1 to 6 with step 1 and the tip clearance s=0.5 to 7.5 mm on the leakage flow at different pressure ratios of PR=1.5, 2 and 2.5 are examined, comprehensively. The analysis is performed numerically using a Finite-Volume software with the k-ε turbulent model. The obtained results show a good agreement in comparison with the other research results. The results show that an increase in the number of teeth causes a decrease in the leakage flow. An increase in the tip clearance (s) from 0.5 mm to around 7.5 mm leads to a decrease in the leakage flow, like the step labyrinth behavior, while an increase beyond 7.5 mm results into a leakage increase, the behavior of the straight labyrinth.
Keywords :
Labyrinth , Seal , Trapezoidal , Number of Teeth , Tip Clearance , Leakage Flow , CFD
Journal title :
Astroparticle Physics
Serial Year :
2017
Record number :
2466491
Link To Document :
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