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Relevant bibliographies by topics / Labyrinth packing

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Academic literature on the topic 'Labyrinth packing'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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Journal articles on the topic "Labyrinth packing"

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Schwartz, Ilsa, Patrick J. Antonelli, Kenneth R. Bouchard, and Jack M. Kartush. "Carbon Dioxide Laser Occlusion of the Guinea Pig Posterior Semicircular Canal." Otolaryngology–Head and Neck Surgery 113, no. 4 (1995): 453–58. http://dx.doi.org/10.1016/s0194-59989570084-6.

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Preservation of hearing is possible with selective ablation of the vestibular system and mechanical occlusion of the semicircular canals. Complete ablation of all three canals would improve exposure of the internal auditory canal fundus (e.g., for acoustic tumor exposure), but mechanical packing of the vestibule would disrupt normal sound transduction. This study was designed to assess the feasibility of preserving hearing with CO2 laser occlusion, without mechanical packing of the posterior semicircular canal membranous labyrinth. Twenty adult Hartley guinea pigs underwent occlusion of the ri

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Antonelli, Patrick J., Kenneth R. Bouchard, Jack M. Kartush, and Paul S. Kubilis. "Triple Semicircular Canal Occlusion in the Guinea Pig." Otolaryngology–Head and Neck Surgery 117, no. 5 (1997): 509–15. http://dx.doi.org/10.1016/s0194-59989770023-8.

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Hearing preservation is possible with translabyrinthine procedures, but the optimal means of sealing the remaining labyrinth has not been determined. The purpose of this study was to compare the effects of mechanical and nonmechanical (CO2 laser-assisted) triple semicircular canal occlusion on hearing in the guinea pig. All three semicircular canals of 19 guinea pigs were treated with one of four techniques: fenestration without packing (control), fenestration with packing, CO2 laser coagulation of the membranous canal without packing, or laser coagulation with packing. Six weeks postoperative

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Kaszowski, Paweł, Marek Dzida, and Piotr Krzyślak. "Calculations of labyrinth seals with and without diagnostic extraction in fluid-flow machines." Polish Maritime Research 20, no. 4 (2013): 34–38. http://dx.doi.org/10.2478/pomr-2013-0038.

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ABSTRACT Labyrinth seals are essential components of steam turbine unit constructions. Two types of labyrinth seals can be named, the first of which is the seal without diagnostic steam extraction, and the second - with extraction. The distribution of flow parameters along the packing is affected remarkably by the average seal clearance. The presence of diagnostic extraction leads to the equation system which is determinable and can be inversed to calculate the average seal clearance Si. Analysing the obtained results leads to the conclusion that the information about this parameter provides o

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Mammar, Lahouari, Yahiaoui Tayeb, Omar Ladjedel, and Ondřej Šikula. "Fluid Thermal Effect on Non-contacting Labyrinth Seal of 20 MW Steam Turbine." Periodica Polytechnica Mechanical Engineering 64, no. 1 (2019): 31–42. http://dx.doi.org/10.3311/ppme.14176.

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This paper is divided into two parts; the first describes a CFD analysis of a gland packing labyrinth seals in 20 MW steam turbine in LNG plant using ANSYS CFX code as an isothermal simulation in fluid domain. The results of two turbulence models k-ε and k-ω SST are compared and validated against experimental data. It is shown that the labyrinth seal leakage is proportional to the clearance cube so any variation in clearance can have a significant impact on the steam leakage. This clearance between the shaft and the labyrinth seal vary as a function of operating temperature due to the differen

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Kirk, R. Gordon. "A Method for Calculating Labyrinth Seal Inlet Swirl Velocity." Journal of Vibration and Acoustics 112, no. 3 (1990): 380–83. http://dx.doi.org/10.1115/1.2930519.

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The results of numerous investigators have shown the importance of inlet swirl on the calculated dynamic stiffness and stability of labyrinth seals. These results have not included any calculation of inlet leakage of swirl as a function of complex disk geometry including the sealing conditions of the given seal. This paper outlines a method of calculating the inlet swirl at the entrance of the labyrinth seal by introducing a radial chamber which when added to the axial flow solution allows the prediction of the gas swirl as it flows radially from the stage tip along the disk face inward to the

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Ridwan, Mohamad, Rosna Yuherlina, and Dimas Andhika Putra. "Analisa dan Penanganan Terjadinya Penurunan Kevakuman pada Kondensor Utama Terhadap Kinerja Turbin Uap Di Kapal LNG." Prosiding Seminar Pelayaran dan Teknologi Terapan 2, no. 1 (2020): 130–39. http://dx.doi.org/10.36101/pcsa.v2i1.134.

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Penggunaan turbin uap sangat diperlukan dalam penggerak utama kapal LNG. Tujuan penelitian ini adalah untuk mengetahui faktor-faktor apa yang mempengaruhi terjadinya penurunan kevakuman pada kondensor utama, dampak yang terjadi dengan adanya penurunan kevakuman pada kondensor utama dan upaya yang dapat dilakukan untuk mengatasi turunnya kevakuman di kondensor utama tersebut. Penelitian ini menggunakan metode kualitatif deskriptif yang bersifat eksplorasi untuk menggambarkan atas suatu fenomena. Fenomena yang diambil adalah tentang penurunan kevakuman pada main condenser yang berpengaruh besar

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Sherstyuk, A. N., and V. S. Orbis-Diyas. "Effect of leakages through labyrinth packings of cover plate on the stage characteristics of a centrifugal compressor." Chemical and Petroleum Engineering 25, no. 4 (1989): 173–75. http://dx.doi.org/10.1007/bf01218800.

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Lalvani, Haresh. "Non-periodic Space Structures." International Journal of Space Structures 2, no. 2 (1987): 93–108. http://dx.doi.org/10.1177/026635118700200204.

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An interesting class of two- and three-dimensional space structures can be derived from projections of higher-dimensional structures. Regular polygons and regular-faced polyhedra provide the geometry of families of n-stars from which two- and three-dimensional projections of n-dimensional grids can be derived. These projections are rhombic space grids composed of all-space filling rhombi and rhombohedra with edges parallel to n directions. An infinite class of single-, double- and multi-layered grids can be derived from n-sided polygons and prisms, and a finite class of multi-directional grids

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Tang, Xufeng, Xue Sun, Fangwei Zhang, Zhidan Liu, and Shuhong Wang. "Method for Zoning Operation of Roundabout Warehouse for Packaging Dangerous Goods under Safety Red Line." Maritime Technology and Research 2, no. 4 (2020): Manuscript. http://dx.doi.org/10.33175/mtr.2020.237444.

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In order to comprehensively consider the safety, efficiency and other factors in the in-and-out operation of dangerous goods, this studytakes the setting of forklift rounding rules as the research background and uses optimization theory and the newly proposed cost formula to study the partitioning question of the warehouse. The practical innovation of this study is to propose the concept of the safety red line as well as obtain the safety formula under this circumstances. The theoretical innovation of this paper is to combine the labyrinth path finding algorithm and the utility theory together

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"Packing acts like a labyrinth seal." Sealing Technology 1996, no. 28 (1996): 3–4. http://dx.doi.org/10.1016/s1350-4789(96)80036-5.

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Dissertations / Theses on the topic "Labyrinth packing"

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Бондаренко, Герман Андрійович, Герман Андреевич Бондаренко, Herman Andriiovych Bondarenko, Вадим Миколайович Бага, Вадим Николаевич Бага та Vadym Mykolaiovych Baha. "Влияние физических свойств газов на характеристики лабиринтного уплотнения". Thesis, Сумский государственный университет, 2015. http://essuir.sumdu.edu.ua/handle/123456789/39428.

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Schroeder, Gerd Elmar. "Skeletons in the labyrinth : medial representations and packing properties of bicontinuous space partitions." Phd thesis, 2005. http://hdl.handle.net/1885/149917.

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Book chapters on the topic "Labyrinth packing"

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Gupta, Dr Ravikant, Vaibhav Rajoriya, Dr Sudha Vengurlekar, and Dr Sachin Kumar Jain. "CURRENT TRENDS AND CHALLENGES IN THE PHARMACEUTICAL AND COSMETIC PACKAGING INDUSTRIES." In Efficient Cost Reduction Strategies in Pharmaceutical and Cosmetic Packaging Solutions. Iterative International Publishers (IIP), Selfypage Developers Pvt Ltd., 2025. https://doi.org/10.58532/nbennurecrs2.

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This chapter presents a comprehensive examination of the current trends and challenges permeating the pharmaceutical and cosmetic packaging industries. In an era characterized by rapid technological advancements, heightened environmental awareness, and evolving consumer expectations, packaging practices are undergoing a transformative journey. The exploration begins by unraveling the surging wave of sustainable packaging solutions, reflecting the industries' commitment to environmental stewardship. Technological innovations, ranging from smart packaging to the integration of IoT devices, emerg

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Conference papers on the topic "Labyrinth packing"

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Bianchini, Cosimo, Riccardo Da Soghe, Davide Bertini, Lorenzo Mazzei, Lorenzo Arcangeli, and Lorenzo Cosi. "CFD Analysis of the Forces on a Steam Turbine Balance Seal Packing Ring." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82896.

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Abstract In high-pressure single flow Steam Turbines, sealing of the radial gap between rotating and stationary parts in the front end of the turbine is a known design challenge. A traditional solution to control and reduce the leakages between the stationary and rotating parts in that area is to implement spring-backed labyrinth packings. The operating position of such packings, which affects the effective clearance and in turn the leakage flow, is determined by the equilibrium of the forces exerted by the steam and the spring load applied on the back. In order to select the adequate spring a

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Roy, Binayak, Hrishikesh V. Deo, and Xiaoqing Zheng. "Progressive Clearance Labyrinth Seal for Turbo-Machinery Applications." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64870.

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Turbomachinery sealing is a challenging problem due to the varying clearances caused by thermal transients, vibrations, bearing lift-off etc. Leakage reduction has significant benefits in improving engine efficiency and reducing emissions. Conventional labyrinth seals have to be assembled with large clearances to avoid rubbing during large rotor transients. This results in large leakage and lower efficiency. In this paper, we propose a novel Progressive Clearance Labyrinth Seal that is capable of providing passive fluidic feedback forces that balance at a small tip-clearance. A modified packin

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Vakili, Ahmad D., Abraham J. Meganathan, Sricharan Ayyalasomayajula, Stephen Hesler, and Lewis Shuster. "Advanced Labyrinth Seals for Steam Turbine Generators." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-91263.

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A new class of knives (C-Shaped) for reduced labyrinth seal discharge has been designed and assessed through two dimensional numerical modeling of the seal’s internal flow passages. Modeling procedures used for the analysis have been previously validated by comparison with static labyrinth seal experiments. The objectives of the new seal are to: 1) reduce flow leakage through the seal and 2) introduce structural flexibility in the knives so that design clearances could be maintained even after rub events during startup. The baseline chosen for comparative evaluation is an N2 packing used in GE

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Tsukuda, Tomohiko, Yoshifumi Iwasaki, Shogo Iwai, and Tsuguhisa Tashima. "Experimental and Analytical Investigation of Labyrinth Seal Packing Ring Behavior in Contact With a Whirling Rotor." In ASME Turbo Expo 2024: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/gt2024-122313.

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Abstract Labyrinth seal packing ring behavior in case of contact with a whirling rotor which simulates the expected rotor vibration in an actual steam turbine was investigated experimentally and analytically. The labyrinth seal packing ring used in this study was designed to be supported to a casing with weak coil springs. The force of the coil springs is set to be slightly larger than the packing ring weight so that it escapes away from the rotor in case of contact with a rotor and the temperature rise of the rotor could be prevented. Experimental investigation with a seal test rig was conduc

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Childs, Dara W., James E. Mclean, Min Zhang, and Stephen P. Arthur. "Rotordynamic Performance of a Negative-Swirl Brake for a Tooth-on-Stator Labyrinth Seal." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25577.

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In the late 1970’s, Benckert and Wachter (Technical University Stuttgart) tested labyrinth seals using air as the test media and measured direct and cross-coupled stiffness coefficients. They reported the following results: (1) Fluid pre-swirl in the direction of shaft rotation creates destabilizing cross-coupled stiffness coefficients, and (2) Effective swirl brakes at the inlet to the seal can markedly reduce the cross-coupled stiffness coefficients, in many cases reducing them to zero. In recent years, “negative-swirl” swirl brakes have been employed that attempt to reverse the circumferent

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Hildebrandt, Manuel, Corina Schwitzke, and Hans-Jörg Bauer. "Experimental Investigation on the Influence of Geometrical Parameters on the Frictional Heat Input and Leakage Performance of Brush Seals." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63423.

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Because of the superior sealing characteristics compared to labyrinth seals, brush seals found an increased spread in turbomachinery in recent years. Their outstanding sealing performance results mainly from their flexibility. Thus, a very small gap between the rotor and bristle package can be obtained without running the risk of severe detrimental deterioration in case of rubbing. Rubbing between rotor and seal during operation might occur as a result of e.g. an unequal thermal expansion of the rotor and stator or a rotor elongation due to centrifugal forces or manoeuvre forces. Thanks to the

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Atlason, Reynir S., Almar Gunnarsson, and Runar Unnthorsson. "Necessity is the Mother of Invention: The Dawn of Domestic Geothermal Turbine Repairs in Iceland." In ASME 2014 Power Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/power2014-32304.

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Even though the Icelandic public relies greatly on geothermal power, to date, intensive maintenance procedures on the geothermal turbines have been conducted by foreign contractors. Such repairs are very time consuming, risky, expensive and leak capital out of the country. This has been discussed greatly within the industry and plans have been made on how the power companies, along with domestic machine shops can address this problem. However, in spring 2013 a turbine failure was observed in a routine quadrennial check at the Nesjavellir geothermal power plant. Corrosion products where found o

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Ingistov, Steve. "Upgrades of Steam Turbine Generator Units in Watson Cogeneration Combined Cycle Plant." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30251.

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This paper describes efforts that were implemented in modifying two Steam Turbine Generators (STG) that are presently operating in Watson Cogeneration Company (WCC) Plant. WCC Plant is comprised of four identical GE made Gas Turbine Generators (GTG) and four Heat Recovery Steam Generators (HRSG) designed and fabricated by Vogt. Portion of high pressure steam is expanded inside two Dresser-Rand-made Steam Turbine Generators (STG). The modifications presented in this paper include replacement of six original stages of expansion, introduction of shaft retractable labyrinths/packing and installati

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