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Relevant bibliographies by topics / Radial segmented seals

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Journal articles
Dissertations / Theses
Conference papers

Academic literature on the topic 'Radial segmented seals'

Author: Grafiati

Published: 28 April 2023

Last updated: 28 July 2025

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Journal articles on the topic "Radial segmented seals"

1

Andasmas, Mohamed, Henri Gajan, Lassad Amami, et al. "Impact of Material on the Sealing Behaviour of Radial Segmented Seals." Tribology Online 19, no. 4 (2024): 287–97. http://dx.doi.org/10.2474/trol.19.287.

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Birch, Philip, and Jamie Haynes. "The Pierce Field, Blocks 23/22a, 23/27, UK North Sea." Geological Society, London, Memoirs 20, no. 1 (2003): 647–59. http://dx.doi.org/10.1144/gsl.mem.2003.020.01.51.

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AbstractThe Pierce Field contains oil and gas in Palaeocene Forties Sand and fractured Chalk, draped around the flanks of a pair of Central Graben salt diapirs. Whilst the two diapirs constitute a single field containing over 387 MMSTB AND 125 BCF, it took almost 25 years, and several advances in seismic, drilling and production technology, for the field to be brought into production. Many appraisal wells were drilled on the field. Data from these wells were interpreted to suggest the field was highly segmented both in terms of petroleum distribution and pressure variance. On the basis of this

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3

Li, Chuantian, Yingfeng Sun, Shiyue Wu, and Xiaoyuan Sun. "Investigation on the Gas Drainage Effectiveness from Coal Seams by Parallel Boreholes." Sustainability 15, no. 2 (2023): 942. http://dx.doi.org/10.3390/su15020942.

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Gas drainage is an important technology to prevent coal and gas outburst, and the drained gas is a kind of clean energy. The gas pressure can characterize gas drainage effectiveness. In this paper, we investigated the effectiveness of gas drainage by gas pressure. Determined by the space shape of the gas flow field, the gas flow state surrounding the drainage boreholes is radial flow. According to the basic equations of radial flow, discrete equations were achieved by the implicit difference scheme, and then we obtained the gas pressure surrounding the drainage boreholes. Results showed that t

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4

Fourt, Erwan, Mihai Arghir, Pascal Jolly, and Mohamed Andasmas. "Experimental Analysis of the Leakage Characteristics of Three Types of Annular Segmented Seals." Journal of Engineering for Gas Turbines and Power 145, no. 9 (2023). http://dx.doi.org/10.1115/1.4062692.

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Abstract The present paper presents an experimental analysis of the leakage characteristics of three kinds of segmented seals. The segments of the first seal have smooth pads while the second seal has pads with pockets. The pads of the third seal are smooth but the rotor is textured with inclined grooves. The pockets or the textures lift the segments from the rotor and create a radial clearance. This is reflected by the leakage flow rate, the friction torque, and the seal's temperature. These characteristics are hereby measured on a dedicated test rig. The presented results are dimensionless,

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5

Jolly, Pascal, Mihai Arghir, Hidetoshi Kasahara, and Wataru Kimura. "Experimental Investigations on Carbon Segmented Seals With Smooth and Pocketed Pads." Journal of Engineering for Gas Turbines and Power, October 4, 2024, 1–22. http://dx.doi.org/10.1115/1.4066788.

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Abstract The present paper introduces experimental results for radial segmented seals operating at high rotating speed. These seals are made of three or more interlocking, carbon-graphite segments, in permanent contact with the rotor while also accommodating its dynamic displacements. Currently, many efforts are made to model these behaviors and for obtaining accurate leakage flow rate and friction torque predictions. A novel test rig fitted with a casing for measuring leakage and friction torque produced by two carbon segmented seals was developed. The tested seals were composed of three segm

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6

Pugachev, Alexander O., Manuel Gaszner, Christos Georgakis, and Paul Cooper. "Segmentation Effects on Brush Seal Leakage and Rotordynamic Coefficients." Journal of Engineering for Gas Turbines and Power 138, no. 3 (2015). http://dx.doi.org/10.1115/1.4031386.

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This paper studies the effect of brush seal segmentation on the seal performance characteristics. A brush–labyrinth sealing configuration arranged of one brush seal downstream and two labyrinth fins upstream is studied experimentally and theoretically. The studied brush seal is of welded design installed with zero cold radial clearance. The brush seal front and back rings as well as the bristle pack are segmented radially in a single plane using the electrical discharge machining (EDM) technique. The segmentation procedure results in loss of bristles at the site of the cuts altering the leakag

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Dissertations / Theses on the topic "Radial segmented seals"

1

Fourt, Erwan. "Étude de joints radiaux en carbone graphite avec application aéronautique." Electronic Thesis or Diss., Poitiers, 2021. http://www.theses.fr/2021POIT2292.

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Cette thèse a pour but d’étudier expérimentalement plusieurs technologies de joints radiaux segmentés. L’introduction permet de situer le contexte du travail tout en évoquant plusieurs technologies d’étanchéités couramment employées dans les moteurs aéronautiques. Au cours de ce chapitre, les contraintes auxquelles les joints radiaux segmentés doivent faire face sont également détaillées. La première étude menée a pour but d’étudier trois technologies différentes de joints radiaux segmentés : sans poche, avec poche sur les patins et enfin une technologie de joint sans poche en vis-à-vis de rai

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Conference papers on the topic "Radial segmented seals"

1

Fourt, Erwan, Mihai Arghir, Pascal Jolly, and Mohamed Andasmas. "Experimental Analysis of the Leakage Characteristics of Three Types of Annular Segmented Seals." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-80195.

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Abstract This paper presents an experimental analysis of the leakage characteristics of three kind of segmented seals. The segments of the first seal has smooth pads while the second seal has pads with pockets. The pads of the third seal are smooth but the rotor is textured with inclined grooves. The pockets or the textures lift the segments from the rotor and create a radial clearance. This is reflected by the leakage flow rate, the friction torque and the seal’s temperature. These characteristics are hereby measured on a dedicated test rig. The presented results are dimensionless, the measur

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2

Arghir, Mihai, and Samia Dahite. "Numerical Analysis of Lift Generation in a Radial Segmented Gas Seal." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-90492.

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Abstract A radial segmented seal is composed of three or six carbon segments that are assembled by a circumferential (garter) spring that presses them against the rotor. Assembled, they take the form of an annular ring. Each segment has several pads that generate a radial lift force depending on the rotor speed. There are many ways of creating effective lift forces. For example, a pocket on the pad creates a lift force because each pad will act as a Rayleigh step bearing. A groove on the rotating shaft will also create a radial lift force on the pad. However, this latter lift force will be uns

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3

Jolly, Pascal, Mihai Arghir, Hidetoshi Kasahara, and Wataru Kimura. "Experimental Investigations on Carbon Segmented Seals With Smooth and Pocketed Pads." In ASME Turbo Expo 2024: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/gt2024-124822.

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Abstract The present paper introduces experimental results for radial segmented seals operating at high rotating speed. These seals are made of three or more interlocking, carbon-graphite segments, in permanent contact with the rotor while also accommodating its dynamic displacements. Currently, many efforts are made to model these behaviors and for obtaining accurate leakage flow rate and friction torque predictions. A novel test rig fitted with a casing for measuring leakage and friction torque produced by two carbon segmented seals was developed. The tested seals were composed of three segm

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4

Pugachev, Alexander O., Manuel Gaszner, Christos Georgakis, and Paul Cooper. "Segmentation Effects on Brush Seal Leakage and Rotordynamic Coefficients." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-42332.

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This paper studies the effect of brush seal segmentation on the seal performance characteristics. A brush-labyrinth sealing configuration arranged of one brush seal downstream and two labyrinth fins upstream is studied experimentally and theoretically. The studied brush seal is of welded design installed with zero cold radial clearance. The brush seal front and back rings as well as the bristle pack are segmented radially in a single plane using the electrical discharge machining technique. The segmentation procedure results in loss of bristles at the site of the cuts altering the leakage flow

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5

Grondahl, Clayton M., and James C. Dudley. "Film Riding Leaf Seals for Improved Shaft Sealing." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-23629.

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Turbine shaft seals are vulnerable to rubs caused by thermal distortion, mis-alignment and rotor dynamic vibration that are often not well understood. When seals rub as a machine is brought up to operating conditions performance is compromised due to increased seal leakage. Much effort has been extended in recent years to develop seals that mitigate those losses. This paper presents a seal design with segmented film riding runners capable of non-contacting seal operation during rotor transients. Operating differential seal pressure displaces seal leaves and attached runners toward the rotor su

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6

Herrmann, N., K. Dullenkopf, and H. J. Bauer. "Flexible Seal Strip Design for Advanced Labyrinth Seals in Turbines." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95424.

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The paper discusses the potential benefit of flexible seal strips in labyrinth seals for turbines. By reducing the radial stiffness compared to a standard straight and stiff knife, seal clearance could be reduced without significantly reducing the seal durability and long-term performance. As contact between the seal strips and the rotor can occur especially during transient operating phases, a more flexible design of the seal strips can prevent damage and wear, keeping the discharge rates constantly low. However, the pressure difference across the fin will cause a deflection of the seal strip

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7

Arghir, Mihai, and Antoine Mariot. "Theoretical Analysis of the Static Characteristics of the Carbon Segmented Seal." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56643.

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The segmented carbon seal is regularly used for sealing bearing chambers of aeronautical turboengines or as part of a buffer seal in space turbopumps. The seal operates with contaminated air or with an inert gas and is made of many identic carbon segments (generally three or six) with reciprocally overlapping ends. The segments are serrated against the rotor by the pressure difference between the upstream and the downstream chambers and by a circumferential (garter) spring. The pressure difference and an axial spring press the segments also against the stator. The inner cylindrical surface of

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8

Xue, Qichao, Xueying Li, and Jing Ren. "Numerical Investigations of Flow Structures in Radial Rim Seal and a Modification of the Orifice Model." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-83536.

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Abstract Under the increasing turbine temperature of gas turbine, the thermal bearing capacity of rotor and stator of turbine is increasingly limited, which poses a more severe challenge to the protection means such as rim seal, and requires more detailed estimation of flow and heat transfer of rim seal. One of the most important parameters in the estimation is the sealing efficiency. The Orifice Model is widely used to simplify the prediction of sealing efficiency of various sealing structures. Its advantage is that different structures can be described by the same model. However, further wor

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9

Kong, Xiaozhi, Gaowen Liu, Yuxin Liu, and Qing Feng. "Investigation on the Leakage Flow, Windage Heating and Swirl Development of Rotating Labyrinth Seal in a Compressor Stator Well." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56740.

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What make the labyrinth seal in a compressor stator well different from the normal labyrinth seal are the inlet and outlet rotor-stator disc cavities. Due to the presence of rotating disc cavities, the windage heating and the swirl development are remarkable, which can have a great influence on the leakage characteristic. Besides, when compressor operates at different speeds, the rotor and stator grow differently owing to centrifugal expansion and thermal expansion. Hence the tip clearance which determines the leakage mass flow changes with the varying of rotational speed and temperature in th

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10

Johannesson, Tomas. "Partial Meshing of Synchronous Belt Teeth." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34548.

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Synchronous belts have been used in power transmissions where synchronization is also needed since the 1940’s. In the 1960’s overhead camshaft engines were introduced and synchronous belts were used as cam belts. This made way for a new standard for belts: improvements were made in materials and profile geometry. These new belts had lower noise emissions and, at the same time, greater durability. Often, both wear and noise are generated when a belt tooth seats or unseats a pulley. A tooth is considered to be fully meshed when the whole belt pitch forms a circular arc. This is not the case for

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