Performance evaluation of trapezoidal teeth labyrinth seal
عنوان مقاله: Performance evaluation of trapezoidal teeth labyrinth seal
شناسه ملی مقاله: JR_EES-5-3_005
منتشر شده در شماره 3 دوره 5 فصل September در سال 1396
شناسه ملی مقاله: JR_EES-5-3_005
منتشر شده در شماره 3 دوره 5 فصل September در سال 1396
مشخصات نویسندگان مقاله:
Razie Abdous - Aerospace Department, Semnan University, Semnan, Iran
Saadat Zirak - Mechanical Engineering Department, Semnan University, Semnan, Iran
خلاصه مقاله:
Razie Abdous - Aerospace Department, Semnan University, Semnan, Iran
Saadat Zirak - Mechanical Engineering Department, Semnan University, Semnan, Iran
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.
کلمات کلیدی: Labyrinth, Seal, Trapezoidal, Number of Teeth, Tip Clearance, Leakage Flow, CFD
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/707320/