... of rotor speed, supply pressure and wear on brush seals performance. In the second part of this work, the results obtained for air are compared to data from the literature, using the equivalent effective clearance. Then, another approach is used for estimating the leakage rate of brush seals by considering...

.... hole-pattern seal oil/air mixtures wet-gas compression rotordynamic coefficients leakage Proceedings of ASME Turbo Expo 2022 Turbomachinery Technical Conference and Exposition GT2022 June 13-17, 2022, Rotterdam, The Netherlands GT2022-83504 NEGATIVE CENTERING FORCES OF WET-GAS HOLE-PATTERN SEALS...

... Abstract Understanding the leakage and rotordynamic performance of a hole-pattern annular seal is critical to the design of a centrifugal pump regarding vibration characteristics and stability. The growing interest in 2-phase pumping, handling gas components in the oil stream directly, brings...

... leakage is roughly up to 26% larger than the HCS leakage, while the 20-blade LS leaks in between both. The comparison of results shows the LS has insignificant forces compared to those from the HCS and FPDS, both producing a comparable C eff and similar crossover frequencies ( C eff > 0). The HCS...

...% but barely changes the test seal’s rotordynamic coefficients; i.e., the increased tooth clearance would not change the pump vibration performance. labyrinth seal tooth clearance oil-air mixtures multiphase pump rotordynamic coefficients leakage Proceedings of ASME Turbo Expo 2021...

... to compare with test results under different flow conditions. smooth seal multiphase pump flow regime rotordynamic coefficients leakage Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-60108 PERFORMANCE...

... mainly gas rotordynamic coefficients leakage TEST RESULTS FOR THE STATIC AND ROTORDYNAMIC CHARACTERISTICS OF A LONG (L/D=0.75) SMOOTH SEAL IN TWO-PHASE (MAINLY GAS) CONDITIONS WITH A 62-BAR INLET PRESSURE Dung L. Tran1, Dara W. Childs2, Hari Shrestha3, Min Zhang4 1 Energy Recovery Inc., San Leandro...

... 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...

... 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 of the see...

... 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 constraints...

..., 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 assembly, especially...

... 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. It is important to know...

... 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 seals were tested...

... 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 and leakage flow effects...

... 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 and damping) are highly...

... 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 vanes are reviewed...

... 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. 11 09 2008 Labyrinth Seal Unworn and Worn Honeycomb Lands...