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Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A021, June 7–11, 2021
Paper No: GT2021-60106
... displacement of the stator to the rotor Keywords: labyrinth seal, tooth clearance, oil-air mixtures, in Y direction [L] multiphase pump, rotordynamic coefficients, leakage µ Viscosity or effective viscosity [FT/L2] density or effective density [M/L3] NOMENCLATURE excitation frequency [1/T] C direct damping...
Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A022, June 7–11, 2021
Paper No: GT2021-60108
... different flow Subscripts X, and Y directions of the coordinate system conditions. X, Y gas component g liquid component Keywords: smooth seal, multiphase pump, flow regime, l rotordynamic coefficients, leakage Acronyms gas volume fraction NOMENCLATURE GVF C direct damping [FT/L] c cross-coupled damping [FT...
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A001, September 21–25, 2020
Paper No: GT2020-14118
... coefficients. Keywords: Smooth Seal, Two-Phase Flow, Mainly Gas, Rotordynamic Coefficients, Leakage. NOMENCLATURE c Cross-coupled damping coefficient [FT/L] C Direct damping coefficient [FT/L] Ceff Effective damping [FT/L] Cij Damping coefficients [FT/L] Cr Seal s radial clearance [L] D Seal s inner diameter...
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A007, September 21–25, 2020
Paper No: GT2020-14267
...Abstract Abstract The labyrinth seal is one of the most popular non-contact annular seals used in centrifugal compressors to improve machine efficiency by reducing the secondary flow leakage. Reducing the radial clearance C r can effectively decrease the seal’s leakage and therefore increase...
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A008, September 21–25, 2020
Paper No: GT2020-14268
...-liquid to pure-gas conditions. Zhang et al. (2019) conducted a comprehensive experimental study on the performance (leakage and rotordynamic coefficients) of a see-through labyrinth seal under mainly-gas conditions. This paper continues Zhang et al.’s (2019) research and studies the performance...
Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 657-667, June 8–12, 2009
Paper No: GT2009-59173
... 23 02 2010 The study deals with optimization of leakage and rotordynamic characteristics of liquid annular seals. A nonlinear constrained multi-objective optimization problem is considered. An objective function is a weighted sum of leakage and whirl-frequency ratio of the seal. Side...
Proc. ASME. GT2007, Volume 4: Turbo Expo 2007, Parts A and B, 1169-1177, May 14–17, 2007
Paper No: GT2007-27469
... expansion, misalignment, and application, to allow correct fitment of the strip seals. Any increase in leakage raises the cost due to an increase in the cooling air use, which is linked to specific fuel consumption, and it can also alter gas flow paths and performance. The narrow path within the seal...
Proc. ASME. GT2003, Volume 4: Turbo Expo 2003, 661-667, June 16–19, 2003
Paper No: GT2003-38984
... 05 02 2009 Labyrinth seals are used in various kinds of turbo machines to reduce internal leakage flow. The working fluid or, the gas passing through the rotor shaft labyrinth seals, often generates driving force components that may increase the unstable vibration of the rotor...
Proc. ASME. GT2004, Volume 4: Turbo Expo 2004, 441-451, June 14–17, 2004
Paper No: GT2004-53935
... 25 11 2008 Advanced brush and finger seal technologies offer reduced leakage rates over conventional labyrinth seals used in gas turbine engines. To address engine manufactures’ concerns about the heat generation and power loss from these contacting seals, brush, finger, and labyrinth...
Proc. ASME. GT2005, Volume 3: Turbo Expo 2005, Parts A and B, 345-357, June 6–9, 2005
Paper No: GT2005-68340
... to the turbine stage and reducing the strength of secondary flows within the passage. Reduction in secondary flows leads to less mixing in the endwall region. This allows improved cooling of the endwall and airfoil surfaces with injected and leakage flows. The present paper documents component misalignment...
Proc. ASME. GT2006, Volume 5: Marine; Microturbines and Small Turbomachinery; Oil and Gas Applications; Structures and Dynamics, Parts A and B, 1303-1312, May 8–11, 2006
Paper No: GT2006-90858
... 23 09 2008 The turbomachinery component of interest in this paper, the pocket damper seal, has the dual purpose of limiting leakage and providing an additional source of damping at the seal location. The rotordynamic coefficients of these seals (primarily the direct stiffness...
Proc. ASME. GT2006, Volume 3: Heat Transfer, Parts A and B, 1321-1331, May 8–11, 2006
Paper No: GT2006-90185
... have been proposed for overcoming strip seal problems such as misalignment of the grooves due to manufacturing and assembly constraints. In this paper various methods, with a particular focus on patents, for minimising the amount of leakage caused by such problems for strip seals between nozzle guide...
Proc. ASME. GT2006, Volume 3: Heat Transfer, Parts A and B, 1483-1493, May 8–11, 2006
Paper No: GT2006-90690
... in CFX. The challenges involved in modeling worn seals and an approach for quality meshing of the same was discussed. Comparisons were made with the test data from seals with unworn honeycomb lands. The leakages for the worn seals were also analyzed. Labyrinth Seal Unworn and Worn Honeycomb Lands...