@article { author = {Abdous, Razie and Zirak, Saadat}, title = {Performance evaluation of trapezoidal teeth labyrinth seal}, journal = {Energy Equipment and Systems}, volume = {5}, number = {3}, pages = {265-273}, year = {2017}, publisher = {University of Tehran}, issn = {2383-1111}, eissn = {2345-251X}, doi = {10.22059/ees.2017.27567}, 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}, url = {https://www.energyequipsys.com/article_27567.html}, eprint = {https://www.energyequipsys.com/article_27567_fa3a31c22c518c8887b2aec0181efe6a.pdf} }