Article
Thermodynamics
Juraj Raic, Christian Gaber, Philipp Wachter, Martin Demuth, Hannes Gerhardter, Mario Knoll, Rene Prieler, Christoph Hochenauer
Summary: Glass furnaces pose a continuous challenge for CFD simulations due to the complex description of multiple phases. Research identified unsuitable oxy-fuel combustion models and a lack of advanced coupling methods. A 3D CFD simulation model for an oxy-fuel glass furnace with electric boosting introduced significant improvements, resulting in accurate temperature predictions of less than 1.93% and 3.81% of experimental data for the combustion chamber and glass tank, respectively.
APPLIED THERMAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Behgam Rahmanivahid, Hossein Ajamein, Tahoora Zakizadeh, Hamed Nayebzadeh
Summary: Magnetic BaxMg1-xFe2O4 (x = 0, 0.1, 0.2 and 0.3) supports were fabricated by solution combustion synthesis and impregnated with barium oxide to form basic nanocatalysts for biodiesel production. Various analyses showed that the addition of Ba slightly increased crystallinity and decreased particle size. The BaO/Ba0.2Mg0.8Fe2O4 sample demonstrated the best physicochemical properties and achieved 97.5% conversion, while the prepared nanocatalysts showed slight deviation after 6 experiments.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Thermodynamics
R. Lopez, J. Gonzalez-Arias, F. J. Pereira, C. Fernandez, J. Cara-Jimenez
Summary: The study found that the best blend composition for hydrochar production is 75% olive pruning and 25% off-specification compost, with hydrochar yield being a critical variable to optimize in future research. Technical simulations demonstrated that using olive pruning instead of the mentioned blend could increase electricity cost, and the use of hydrochar as fuel may lead to increased total capital investment and electricity cost.
Article
Energy & Fuels
Qi Wang, Enlu Wang
Summary: This study focuses on the application of carbon-neutral technology from biomass in ironmaking blast furnace production, using a 3D CFD model to describe the flow and thermochemical behavior of biochar in the furnace. Results show that cylindrical biochar particles have slower gas conversion rate and smaller burnout compared to spherical particles, and high carbonization temperature decreases biochar burnout. BC-773 presents potential to better replace PCI coals in blast furnace practice.
Article
Energy & Fuels
Hassan Mohanna, Jean-Michel Commandre, Bruno Piriou, Benoit Taupin, Gilles Vaitilingom, David Honore
Summary: Experimental combustion and numerical modeling of raw and torrefied pine and demolition wood particles were conducted to determine the kinetics of devolatilization and oxidation. Different scenarios tested showed minor variations in devolatilization activation energy but significant differences in char oxidation activation energy. The influence of particle volume evolution and drag force models on the derived kinetic parameters were examined, revealing noticeable differences in particle temperature and other properties along the reactor axis.
Article
Materials Science, Multidisciplinary
Robert Dzurnak, Augustin Varga, Gustav Jablonsky, Miroslav Variny, Marcel Pastor, Ladislav Lukac
Summary: Research shows that the application of oxygen-enhanced combustion technology in aluminum melting can significantly reduce fuel consumption and greenhouse gas emissions, with 35% oxygen concentration being the optimal choice. Using a modified burner and OEC technology can reduce CO2 emissions by 10% and total GHG emissions by 15%, and increase furnace productivity.
Article
Engineering, Environmental
Lianghong Shi, Shuangyang Li, Chong Wang, Jiale Yang, Yongchun Zhao
Summary: Over 60% of canals in seasonally frozen regions are damaged by frost heaving, which significantly affects their drainage function, especially for canals with berms. The complex heat-moisture-deformation processes in berms, caused by their special geometric characteristics, heterogeneous soil composition, irregular water supply, and periodic freeze-thaw cycles, make the berm parts more vulnerable to frost heaving damage, leading to the impairment of canal operation.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Energy & Fuels
Ming Jiang Gan, Yiran Liu, Yansong Shen
Summary: A novel ironmaking decarbonisation technology, co-injection of hydrogen and biochar (CoHB) in blast furnaces, is proposed for a feasible and sustainable carbon-neutral ironmaking. A three-dimensional computational fluid dynamics (CFD) model is developed to understand the internal combustion behavior related to CoHB. The model is validated and the results show that proper hydrogen injection can enhance biochar burnout, but the competition with oxygen hinders char reactions.
Article
Engineering, Multidisciplinary
Patrick Nau, Andre Mueller, Niklas Petry, Sebastian Nilsson, Torsten Endres, Mattias Richter, Benjamin Witzel
Summary: Fiber-coupled phosphor thermometry was used to measure online wall temperatures in a full-scale gas turbine combustor fueled with natural gas and up to 100 vol% hydrogen. Two phosphors, YAG:Dy and YAG:Tm;Li, were tested for this application. YAG:Tm;Li showed promise but was found to be incompatible with the used setup due to interference from the laser. A strategy to compensate for flame emission interferences during natural gas operation was developed, enabling single-shot temperature measurements at 15 Hz with a precision of 2-7 K for a 1 s average.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Zhou Wang, Haitao Liu, Shizhong Wei, Qing Liu, Xinchun Lu
Summary: This study investigated the effect of blowing parameters on bath mixing efficiency during BOF steelmaking process, proposed a mixing index to evaluate the mixing degree, and identified the optimal combination of blowing parameters. Application of the optimal blowing parameters improved the carbon and oxygen equilibrium in industrial BOF vessels, demonstrating the potential to enhance mixing efficiency in commercial steelmaking processes.
ENGINEERING REPORTS
(2021)
Article
Thermodynamics
Ping Jin, Zhiwei Chen, Jiguo Sun, Guobiao Cai
Summary: This study investigates the cooling and thermal protection for future high-thrust H2/O2 rocket engines. A numerical model based on transpiration cooling is presented and validated by experiments. The results show that transpiration cooling with 13% of the total hydrogen mass flow rate can significantly reduce the gas side temperature of the injector plate and the thermal penetration depth. Increasing the coolant mass flow rate and decreasing the coolant inlet temperature can further improve the cooling effectiveness, and reducing the thermal conductivity of the porous media can lower the plate temperature.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Andriy Redko, Yurii Burda, Rafael Dzhyoiev, Igor Redko, Volodymyr Norchak, Serhii Pavlovskiiy, Oleksandr Redko
Summary: The paper presents a numerical study and computer simulation results of peat combustion in a swirl furnace with countercurrent swirl flows, indicating that the diameter of peat particles affects the combustion process, and that high-efficiency combustion can be achieved through technological means.
Article
Thermodynamics
Yuan-Shu Liu, Rui Xue, Jun-Li Liu, Chao-Qi Xu, Shao-Hua Zhu, Bing Liu
Summary: As the inflow velocity increases, a smooth mode transition is required for the rocket-based combined cycle (RBCC) engine to prevent severe thrust fluctuations caused by the reduction of fuel mass flow rate during the transition process. Different throttling strategies were employed to study the dynamic mode transition process in RBCC engine, and stable mode transition was achieved by adjusting fuel and rocket mass flow rate.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Geological
Chenghao Zhong, Tianfu Xu, Yilong Yuan, Guodong Cui, Fabrizio Gherardi, Xiang Li
Summary: A comprehensive understanding of the coupled effects of elastic and plastic deformation on the hydraulic evolution of geothermal fractures is crucial for sustainable and profitable energy production from Enhanced Geothermal System (EGS). Experimental results showed that the hydraulic properties of fractures are negatively correlated with confining pressure, with plastic deformation being the main factor affecting them. Higher temperatures result in larger plastic deformations, indicating the importance of proppant addition for sustainable geothermal development.
ENGINEERING GEOLOGY
(2023)
Review
Materials Science, Multidisciplinary
Guilin Wang, Jianliang Zhang, Yaozu Wang, Yubo Tan, Zhen Li, Bo Zhang, Zhengjian Liu
Summary: This study focuses on the behavior and mechanism of smelting reduction of iron ore in the bath smelting process. It investigates the thermal decomposition characteristics of iron ore, the smelting reduction mechanism of iron-ore particles, and the smelting reduction mechanism of FeO-bearing slag. The experimental methods, reaction mechanisms, influencing factors, and kinetic behavior of these three aspects are highlighted. The findings provide a theoretical basis for selecting and optimizing raw materials in the bath smelting reduction process, as well as insights for improving the reaction rate.
Article
Multidisciplinary Sciences
A. Kao, J. Gao, K. Pericleous
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2018)
Article
Acoustics
G. S. Bruno Lebon, Iakovos Tzanakis, Koulis Pericleous, Dmitry Eskin
ULTRASONICS SONOCHEMISTRY
(2018)
Article
Mechanics
A. Tucs, V. Bojarevics, K. Pericleous
JOURNAL OF FLUID MECHANICS
(2018)
Article
Materials Science, Multidisciplinary
Andrew Kao, Ivars Krastins, Matthaios Alexandrakis, Natalia Shevchenko, Sven Eckert, Koulis Pericleous
Article
Acoustics
D. G. Eskin, I. Tzanakis, F. Wang, G. S. B. Lebon, T. Subroto, K. Pericleous, J. Mi
ULTRASONICS SONOCHEMISTRY
(2019)
Article
Acoustics
G. S. Bruno Lebon, Iakovos Tzanakis, Koulis Pericleous, Dmitry Eskin, Patrick S. Grant
ULTRASONICS SONOCHEMISTRY
(2019)
Article
Acoustics
G. S. Bruno Lebon, Georges Salloum-Abou-Jaoude, Dmitry Eskin, Iakovos Tzanakis, Koulis Pericleous, Philippe Jarry
ULTRASONICS SONOCHEMISTRY
(2019)
Article
Multidisciplinary Sciences
A. Kao, N. Shevchenko, M. Alexandrakis, I. Krastins, S. Eckert, K. Pericleous
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2019)
Article
Nanoscience & Nanotechnology
B. Cai, A. Kao, P. D. Lee, E. Boller, H. Basevi, A. B. Phillion, A. Leonardis, K. Pericleous
SCRIPTA MATERIALIA
(2019)
Article
Thermodynamics
Rijie Zhao, Jianrong Gao, Andrew Kao, Koulis Pericleous
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Chemistry, Physical
Bruno Lebon, Iakovos Tzanakis, Koulis Pericleous, Dmitry Eskin
Article
Chemistry, Physical
Koulis Pericleous, Valdis Bojarevics, Georgi Djambazov, Agnieszka Dybalska, William D. Griffiths, Catherine Tonry
Article
Acoustics
C. E. H. Tonry, G. Djambazov, A. Dybalska, W. D. Griffiths, C. Beckwith, V. Bojarevics, K. A. Pericleous
ULTRASONICS SONOCHEMISTRY
(2020)
Proceedings Paper
Acoustics
Christopher Beckwith, Koulis Pericleous, Valdis Bojarevics
17TH ANNUAL ANGLO-FRENCH PHYSICAL ACOUSTICS CONFERENCE (AFPAC)
(2019)
Article
Physics, Multidisciplinary
A. Tucs, V Bojarevics, K. Pericleous