Relevant bibliographies by topics / Steam-gas cavity

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Steam-gas cavity'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Steam-gas cavity"

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Jowkar, Amin, Farhang Sereshki, and Mehdi Najafi. "Numerical simulation of UCG process with the aim of increasing calorific value of syngas." International Journal of Coal Science & Technology 7, no. 1 (2019): 196–207. http://dx.doi.org/10.1007/s40789-019-00288-x.

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AbstractThe determination of operational parameters in the underground coal gasification (UCG) process should be considered in two aspects: first, the total coal in each UCG panel must be gasified and second, the calorific value of the produced gas should be acceptable. The main aim of this study is to present a model that meets these aspects and increasing the calorific value of syngas during this process. In order to achieve those aims, eight different increasing scenarios were devised for total gasification of coal per panel. These scenarios included: increasing oxygen injection rate (scena
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Borschev, N. O. "Methods for controlling temperature of the instrumentation equipment using the contour heat pipe." Proceedings of Higher Educational Institutions. Маchine Building, no. 3 (756) (March 2023): 110–19. http://dx.doi.org/10.18698/0536-1044-2023-3-110-119.

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The paper considers two ways of maintaining temperature of the instrumentation equipment: using the heat pipes equipped with thermoelectric cooling plate on the compensation cavity and the control valve installed at the outlet of the evaporating radiator. Since the temperature of the contour heat pipe is mainly controlled by the temperature of the compensation cavity positioned behind the evaporator, maintaining the high-precision temperature mode of this device is an urgent task for the entire spacecraft thermal regime. In the first method, the evaporating radiator is heated or cooled dependi
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Mallett, CW. "Environmental controls for underground coal gasification." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 1 (2017): 47–55. http://dx.doi.org/10.1177/0957650917723733.

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Effective environmental management of an underground coal gasification pilot has been demonstrated at Kogan in Queensland, Australia. It commenced with selection of a suitable site with a coal seam surrounded by impervious rocks that provided a gas seal for the gasifier and sufficient groundwater pressure to constrain lateral loss of gas and chemicals through coal fractures. Project infrastructure was specified to withstand the temperatures and pressures experienced during gasification and gas processing. During syngas production in the second gasifier, Panel 2, it was shown that all pyrolysis
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Nur Farhana Hayazi, Ku Adri Azhan Ku Mohamad, Junaidi Che Halim, and Shaiful Rizam Shamsudin. "Incoloy 800HT Weldolet Integrity in Hot Collector: Replica Testing Insights." International Journal of Nanoelectronics and Materials (IJNeaM) 17, December (2024): 205–17. https://doi.org/10.58915/ijneam.v17idecember.1627.

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In this paper, the integrity assessment of Primary Reformer’s hot collector weldolet in the fertilizer plant was conducted. It aims to discuss the findings of the relevant weldolet weldments which include dye penetrant test ultrasonic test, in-situ field metallography (replication), hardness measurements and rectification measures. The first step of the steam reforming process takes place in the Primary Reformer, where preheated hydrocarbon and steam mixture is passed downwards through vertical tubes containing catalyst. The hot gas that exited from the catalyst tubes is termed reformed gas an
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Ma, Xiao Xuan, Zeng He Li, Tij Je Cai, and Ya Zhen Liu. "Thermal Decomposition Dew Point Method for Determining the Trace Moisture in Ultra-Purity Ammonia." Advanced Materials Research 718-720 (July 2013): 571–75. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.571.

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This article introduced a fast and stable method on measuring the batches of trace moisture in ultra-purity ammonia gas .This method is based on ammonia decomposited reaction ,which occurs completely and irreversibly when ammonia is passed over nickel catalyst at high temperatures. While the trace water wapor passes though the catalyst unchanged. And the moisture of ammonia may be determined by measuring the dew point of the steam of hydrogen and nitrogen produced by decomposition of ammonia,combined with the trace oxygen content measured by GC,the content of trace moisture in ultra-purity amm
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KIM, BUMJOON, and BYEONGSOO LIM. "EVALUATION OF CREEP-FATIGUE LIFE BY FRACTION OF CAVITY AREA." International Journal of Modern Physics B 20, no. 25n27 (2006): 4237–42. http://dx.doi.org/10.1142/s021797920604115x.

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The components of power plant such as main steam pipe and gas turbines are operated under static and cyclic load conditions. As the period of static load increases, the service life of these components decreases. Generally, the increase of cyclic load results in fatigue damage and the increase of static load period results in the metallurgical degradation by the effect of creep. Under the creep-fatigue interaction, cavities cause rapid degradation of material and decreases the creep-fatigue life of high temperature components. In this paper, creep-fatigue tests were performed to investigate th
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Bayley, F. J., C. A. Long, and A. B. Turner. "Discs and Drums: The Thermo-Fluid Dynamics of Rotating Surfaces." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 207, no. 2 (1993): 73–81. http://dx.doi.org/10.1243/pime_proc_1993_207_103_02.

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This paper reviews long-term experimental and theoretical research programmes concerned with flow and heat transfer over the large rotating surfaces, commonly discs, often drums but sometimes conical, used to support the blades in turbomachinery. The account begins with a geometry found in turbomachinery from the oldest steam plant to the most modern gas turbine, in which a disc rotates near to a stationary, usually coaxial, member. The flow in the intervening ‘wheel-space’ is well understood, but external conditions can affect the extent and nature of ingress from the surrounding fluid. In th
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Reshetnikov, I.F., S.V. Shikhalev, and S.L. Tikhonov. "Influence of Non - Condensable Gases on the Processes of Heat and Mass Transfer during Film Condensation of Steam in Heat Exchangers." Problemele Energeticii Regionale 3(38) (December 15, 2018): 102–11. https://doi.org/10.5281/zenodo.2222362.

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The aim of the article is a quantitative assessment of the influence of non-condensable gases on the intensity of heat and mass transfer processes during film condensation of steam in the specific conditions for heat exchanger. The task is achieved by conducting experimental research of heat and mass transfer processes in film condensation of steam in the presence of non-condensable gases.The study was carried out by the method of stationary heat flow on an experimental kettle with a jacket (0,02 m3 capacity), industrial cooking boilers (0,04 m3 and 0,06 m3 capacity). Cylindrical kettles with
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Shen, Wenjie, Suofang Wang, Mengyuan Wang, Weilin Dong, and Kai Zhang. "Transient response and volume model of steam cooling in a rotor–stator disk cavity of gas turbines." Thermal Science and Engineering Progress 53 (August 2024): 102701. http://dx.doi.org/10.1016/j.tsep.2024.102701.

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Eden, T. J., T. F. Miller, and H. R. Jacobs. "The Centerline Pressure and Cavity Shape of Horizontal Plane Choked Vapor Jets With Low Condensation Potential." Journal of Heat Transfer 120, no. 4 (1998): 999–1007. http://dx.doi.org/10.1115/1.2825921.

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A study of plane, underexpanded, condensing vapor jets was undertaken using flash photography and a ventilated pressure probe. This study examined horizontal jets with much lower condensation driving potentials than have been previously studied. Photographic measurements of jet expansion angles, spread angles, cavity lengths, and cavity shapes were recorded and compared with numerical predictions using a parabolic, locally homogeneous flow model that had been modified to incorporate entrainment and condensation effects. When rendered dimensionless by the nozzle width rather than diameter, the
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Dissertations / Theses on the topic "Steam-gas cavity"

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Вінніков, Денис Вікторович. "Електрофізичний вплив потужного підводного іскрового розряду на процеси обробки речовин". Thesis, Національний науковий центр "Харківський фізико-технічний інститут", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/33188.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.09.13 – техніка сильних електричних та магнітних полів. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. Дисертація присвячена вдосконаленню електророзрядного обладнання, що використовується для обробки речовин сильно струмовим підводним іскровим розрядом. Проведено аналіз здобутих властивостей матеріалів та рідин в залежності від електричних параметрів розрядного кола, розмірів міжелектродного проміжку, конструкцій електрогідравлічних реакторів і тиску у реакторі. За
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Вінніков, Денис Вікторович. "Електрофізичний вплив потужного підводного іскрового розряду на процеси обробки речовин". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/33183.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.09.13 – техніка сильних електричних та магнітних полів. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. Дисертація присвячена вдосконаленню електророзрядного обладнання, що використовується для обробки речовин сильно струмовим підводним іскровим розрядом. Проведено аналіз здобутих властивостей матеріалів та рідин в залежності від електричних параметрів розрядного кола, розмірів міжелектродного проміжку, конструкцій електрогідравлічних реакторів і тиску у реакторі. Зап
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Conference papers on the topic "Steam-gas cavity"

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Liu, Zhansheng, Jinlei Qi, and Xiangyu Yu. "Effects of Conical Cavity on the Load Capacity of Externally Pressurized Steam-Lubricated Journal Bearing." In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gt2023-101381.

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Abstract Motivated by the urgent need for the development of oil-free and closed-loop turbomachinery in deep-space and deep-sea exploration missions, process-gas lubricated bearing has seen the recent surge of interest due to its numerous advantages. Particularly, externally pressurized steam-lubricated bearing plays an important role in closed-cycle steam turbine, which significantly influences the machine reliability and operating characteristics. In order to achieve effective lubrication and obtain high load capacity, a full understanding of how bearing geometrical parameters and gas proper
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Stasenko, David, Nikhil Rao, and Diganta Narzary. "Thrust Force Measurements in an Axial Steam Turbine Test Rig." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14673.

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Abstract Large mechanical drive steam turbines used in the oil & gas industry are operating at increasingly higher inlet pressure, generating higher shaft power. Those higher power requirements result in larger disk diameters and surface areas. High thrust forces can be a result, due to both the high inlet pressure and large disk surface area. Industry standards require oversizing of thrust bearings to handle uncertainty in thrust predictions. These factors make improvement in thrust prediction accuracy and mitigation strategies important. A full-size, axial flow steam turbine test rig cap
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San Andrés, Luis, Tingcheng Wu, Jose Barajas-Rivera, Jiaxin Zhang, and Rimpei Kawashita. "Leakage and Cavity Pressures in an Interlocking Labyrinth Gas Seal: Measurements vs. Predictions." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91507.

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Abstract Gas labyrinth seals (LS) restrict secondary flows (leakage) in turbomachinery and their impact on the efficiency and rotordynamic stability of high-pressure compressors and steam turbines can hardly be overstated. Amongst seal types, the interlocking labyrinth seal (ILS), having teeth on both the rotor and on the stator, is able to reduce leakage up to 30% compared to other LSs with either all teeth on the rotor or all teeth on the stator. This paper introduces a revamped facility to test gas seals for their rotordynamic performance and presents measurements of the leakage and cavity
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Kim, Hwan Yeol, Kwang Soon Ha, Jong Hwan Kim, Seong Wan Hong, and Jin Ho Song. "A Core Catcher Concept and First Experimental Results." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-30038.

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In a postulated core melt accident, if a molten core is released outside a reactor vessel despite taking mitigation actions, the core debris would relocate in the reactor cavity region and attack the concrete wall and basemat of the reactor cavity. This will potentially result in inevitable concrete decompositions and possible radiological releases. To prevent direct contact of the melt and basemat concrete of the cavity, a core catcher concept is suggested, which can passively arrest and stabilize the molten core material inside the reactor cavity. The core catcher system includes a retention
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Ma, Can, Zhiqiang Qiu, Jinlan Gou, Jun Wu, Zhenxing Zhao, and Wei Wang. "Axial Force Balance of Supercritical CO2 Radial Inflow Turbine Impeller Through Backface Cavity Design." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76019.

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The supercritical CO2-based power cycle is very promising for its potentially higher efficiency and compactness compared to steam-based power cycle. Turbine is the critical component in the supercritical CO2-based cycle which delivers the power. Compared to the gas turbine or steam turbine of similar power output, the size of the supercritical CO2 radial turbine is much smaller and the axial force on the impeller is much larger. The load on the thrust bearing could be too heavy for long-term safe operation. Therefore, it is necessary to balance the axial force on the impeller through aerodynam
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Bohn, Dieter, Jing Ren, and Christian Tuemmers. "Investigation of the Unstable Flow Structure in a Rotating Cavity." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90494.

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Annular cavities are found inside rotor shafts of turbomachines with an axial or radial throughflow of cooling air, which influences the thermal efficiency and system reliability of the gas turbines. The flow and heat transfer phenomena in those cavities should be investigated in order to minimize the thermal load and guarantee system reliability. An experimental rig is set up in the Institute of Steam and Gas Turbines to analyze the flow structure inside the rotating cavity with an axial throughflow of cooling air. The corresponding 3D numerical investigation is carried out with the in-house
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Rubechini, Filippo, Michele Marconcini, Andrea Arnone, Stefano Cecchi, and Federico Dacca`. "Some Aspects of CFD Modeling in the Analysis of a Low-Pressure Steam Turbine." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27235.

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A three-dimensional, multistage, Navier-Stokes solver is applied to the numerical investigation of a four stage low-pressure steam turbine. The thermodynamic behavior of the wet steam is reproduced by adopting a real-gas model, based on the use of gas property tables. Geometrical features and flow-path details consistent with the actual turbine geometry, such as cavity purge flows, shroud leakage flows and partspan snubbers, are accounted for, and their impact on the turbine performance is discussed. These details are included in the analysis using simple models, which prevent a considerable g
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Tanaka, Ryozo, Takao Sugimoto, Masanori Ryu, Masayoshi Kinugawa, and Koichiro Tsuji. "Continuing Improvements of 20MW-Class GT Kawasaki L20A." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90394.

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Kawasaki Heavy Industries launched the first model of L20A gas turbine, rated at 18MW, in 2001 [1]. After the first model was launched, continuing improvements in both performance and durability have been made [2]. This paper describes the latest improvement activities, including cooling improvement of the 1st stage turbine blades using the results from an optical pyrometer thermal mapping system (Rotamap II) and performance improvements achieved by reducing the secondary air flow. In addition, by applying the non-cooled 2nd stage turbine blades made of single crystal material, plus improved r
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Oshkai, Peter, and Oleksandr Barannyk. "Quantitative Visualization of Unstable, Acoustically Coupled Shear Layers in Deep Axisymmetric Cavities." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28271.

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High-amplitude acoustic pressure fluctuations associated with locked-on, resonant flow states frequently occur in engineering systems that involve internal cavities located in pipelines, such as components of gas transport systems, steam delivery pipelines and jet engines. This paper describes the evolution of fully turbulent, acoustically coupled shear layers that form across deep, axisymmetric cavities. Effects of geometric modifications of the cavity edges on the separated flow structure were investigated using digital particle image velocimetry (PIV). The internal flow was non-intrusively
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Fakhari, Keramat, Thomas Hofbauer, and Anton Weber. "Numerical Investigation of Unsteady Blade Row Interactions With Leakage Flow in Steam Turbines." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59613.

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This paper focuses on the interaction of labyrinth seal leakage flows within two stages of a HP and an IP steam turbine. Numerical studies have been carried out with the DLR in-house code TRACE [1] to show the impact of the labyrinth seal leakage flow on the total loss generation in both steady and time accurate simulations. CFD results are verified by the in-house 2D through-flow method of Siemens Energy. The investigations are divided into five steps: 1. Real gas effects, 2. Steady simulations of the core flow alone and its interaction with the cavity flow to provide insights about loss prod
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