TY - GEN
T1 - Effects of clearance on leakage flow characteristics of labyrinth brush seal
AU - Wei, Yuan
AU - Chen, Zhaobo
AU - Jiao, Yinghou
AU - Du, Xin
AU - Zhang, Zhouqiang
N1 - Publisher Copyright:
© Springer International Publishing Switzerland 2015.
PY - 2015
Y1 - 2015
N2 - To analysis the effects of clearance on labyrinth brush seal in a gas turbine, the leakage flow characteristics and distribution on rotor surface, bristle pack free height and fence height were numerically analyzed using Reynoldsaveraged Navier-Stokes (RANS) solutions coupling with a non-Darcian porous medium model. The reliability of the present numerical method was proved, which were in agreement with the experimental and numerical results from literatures. Five sizes of bristle pack tip clearances (0, 0.1, 0.2, 0.3, and 0.4 mm) under different pressure ratios, and other operating conditions were utilized to investigate the clearance modification on the labyrinth brush seal dynamic behaviors which were compared with the corresponding labyrinth seal. The results indicate that at the same pressure ratio the increase of clearance size between the bristle pack and rotor surface will lead to leakage rate rise. More over, at the same clearance and pressure ratio the flow fields in labyrinth brush seal are more complex than labyrinth seal, and the leakage rate of labyrinth brush seal is significantly less than labyrinth seal. The leakage flow pattern, static pressure, and velocity in the labyrinth brush seal and labyrinth seal was also illustrated.
AB - To analysis the effects of clearance on labyrinth brush seal in a gas turbine, the leakage flow characteristics and distribution on rotor surface, bristle pack free height and fence height were numerically analyzed using Reynoldsaveraged Navier-Stokes (RANS) solutions coupling with a non-Darcian porous medium model. The reliability of the present numerical method was proved, which were in agreement with the experimental and numerical results from literatures. Five sizes of bristle pack tip clearances (0, 0.1, 0.2, 0.3, and 0.4 mm) under different pressure ratios, and other operating conditions were utilized to investigate the clearance modification on the labyrinth brush seal dynamic behaviors which were compared with the corresponding labyrinth seal. The results indicate that at the same pressure ratio the increase of clearance size between the bristle pack and rotor surface will lead to leakage rate rise. More over, at the same clearance and pressure ratio the flow fields in labyrinth brush seal are more complex than labyrinth seal, and the leakage rate of labyrinth brush seal is significantly less than labyrinth seal. The leakage flow pattern, static pressure, and velocity in the labyrinth brush seal and labyrinth seal was also illustrated.
KW - Clearance
KW - Labyrinth brush seal
KW - Leakage flow characteristics
KW - Non-Darcian porous medium model
KW - Sealing performance
UR - https://www.scopus.com/pages/publications/84937391406
U2 - 10.1007/978-3-319-06590-8_167
DO - 10.1007/978-3-319-06590-8_167
M3 - 会议稿件
AN - SCOPUS:84937391406
T3 - Mechanisms and Machine Science
SP - 2019
EP - 2029
BT - Proceedings of the 9th IFToMM International Conference on Rotor Dynamics
A2 - Pennacchi, Paolo
PB - Kluwer Academic Publishers
T2 - 9th IFToMM International Conference on Rotor Dynamics, 2014
Y2 - 22 September 2014 through 25 September 2014
ER -