Honeycomb stepped labyrinth seals in turbomachinery enhance aerodynamic efficiency by reducing leakage flow losses through the clearance between rotating and stationary components. The influence of pressure ratio and sealing clearance on the leakage flow characteristics in the honeycomb stepped labyrinth seal is numerically determined. The geometries investigated represent designs of the honeycomb labyrinth seal typical for modern turbomachinery. The leakage flow fields in the honeycomb and smooth stepped labyrinth seals are obtained by the Reynolds-Averaged Navier-Stokes solution using the commercial software FLUENT. Numerical simulations covered a range of pressure ratio and three sizes of sealing clearance for the honeycomb and smooth stepped labyrinth seals. The numerical discharge coefficients of the non-rotating honeycomb and smooth stepped labyrinth seals are in good agreement with previous experimental data. In addition rotational effects are also taken into account in numerical computations. The numerical results show that the leakage flow rate increases with the increasing pressure ratio at the fixed sealing clearance for the rotating and non-rotating honeycomb labyrinth seal. The influence of the sealing clearance on the leakage flow pattern for the rotating and non-rotating honeycomb labyrinth seal are observed. Moreover, the similar leakage flow rates are obtained at the same flow condition between the rotating and non-rotating honeycomb labyrinth seal due to the honeycomb acts to kill swirl velocity development for the rotating honeycomb labyrinth seal.
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ASME Turbo Expo 2007: Power for Land, Sea, and Air
May 14–17, 2007
Montreal, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-4793-4
PROCEEDINGS PAPER
Effects of Pressure Ratio and Sealing Clearance on Leakage Flow Characteristics in the Rotating Honeycomb Labyrinth Seal
Jun Li,
Jun Li
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Xin Yan,
Xin Yan
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Guojun Li,
Guojun Li
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Zhenping Feng
Zhenping Feng
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Jun Li
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Xin Yan
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Guojun Li
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Zhenping Feng
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Paper No:
GT2007-27740, pp. 1199-1206; 8 pages
Published Online:
March 10, 2009
Citation
Li, J, Yan, X, Li, G, & Feng, Z. "Effects of Pressure Ratio and Sealing Clearance on Leakage Flow Characteristics in the Rotating Honeycomb Labyrinth Seal." Proceedings of the ASME Turbo Expo 2007: Power for Land, Sea, and Air. Volume 4: Turbo Expo 2007, Parts A and B. Montreal, Canada. May 14–17, 2007. pp. 1199-1206. ASME. https://doi.org/10.1115/GT2007-27740
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