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8th International Conference on Modeling and simulation of Metallurgical Processes in Steelmaking, STEELSIM 2019

作者： Liu, Wenjie Guo, Xipeng Silaen, Armin K. Walla, Nicholas Oltmann, Helmut Bhansali, Abhishek Pitts-Baggett, April Thapliyal, Vivek Pretorius, Eugene Zhou, Chenn Q. Center for Innovation through Visualization and Simulation Purdue University Northwest 2200 169th Street HammondIN46323 United States Nucor Steel 3401 Process Dr NW DecaturAL35601 United States

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高炉炉缸内衬形状预测研究

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工程热物理学报 2019年第7期40卷 1577-1582页

作者：李佳玲朱蓉甲周萍阳春华周谦中南大学能源科学与工程学院长沙410083 中南大学信息科学与工程学院长沙410083 Center for Innovation through Visualization and Simulation Purdue University Northwest Hammond 46323 USA

高炉炉缸是高炉生产过程中环境最为恶劣的区域,炉缸内衬的侵蚀状况决定了高炉的工作寿命,因此实现炉缸内衬形状的预测具有十分重要的意义。本文结合炉缸内部流动传热CFD正解模型和一维传热逆解模型预测炉缸的内衬热面形状,该计算模型考... 详细信息

高炉炉缸是高炉生产过程中环境最为恶劣的区域,炉缸内衬的侵蚀状况决定了高炉的工作寿命,因此实现炉缸内衬形状的预测具有十分重要的意义。本文结合炉缸内部流动传热CFD正解模型和一维传热逆解模型预测炉缸的内衬热面形状,该计算模型考虑了耐火砖内温度变化对导热系数的影响,并利用1150℃等温线对热面形状的预测作为初始值。结果显示预测后的计算温度和工厂热电偶测量温度很好地吻合,验证了热面形状预测方法的准确性和有效性。

关键词：高炉炉缸 CFD 传热侵蚀

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Numerical study on pulverized coal combustion in a raceway from the viewpoint of coal plume

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Energy Procedia 2019年 158卷 5517-5522页

作者： Dongling Wu Ping Zhou Chenn Q Zhou School of Energy Science and Engineering Central South University Changsha 410083 China Center for Innovation through Visualization and Simulation Purdue University Northwest 2200 169th Street Hammond IN 46323 USA

The combustion efficiency of pulverized coal particles in a blast furnace depends strongly on the particle flow behaviors and the shape of the main combustion zone, i.e., the raceway shape. With a coupling method, a raceway formation model and a multiphase reaction model were integrated to predict the raceway shape. The pulverized coal combustion under different operating conditions were simulated, and the combustion performance was analyzed regarding a low-burnout region inside the coal plume. The results show that the raceway shape affects the expansion degree of the plume and then the combustion performance. Increasing the oxygen enrichment rate in the blast significantly promotes the combustion reactions of particles in the inner region of the plume. With an optimal blast rate, the overall burnout rate can be improved with the centered particles having the highest oxygen accessibility.

关键词： pulverized coal combustion coal plume size segregation blast furnace numerical simulation

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Academic/industry educational lab for simulation-based test & evaluation of autonomous vehicles 18

Academic/industry educational lab for simulation-based test ...

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2018 Winter simulation Conference, WSC 2018

作者： Leathrum, James F. Mielke, Roland R. Shen, Yuzhong Johnson, Harry Department of Modeling Simulation and Visualization Engineering Old Dominion University NorfolkVA United States Center for Innovation Lockheed Martin Suffolk VA United States

ISBN: (纸本)9781538665725

An academic/industry alliance can improve the preparedness of students to enter the workforce. When the alliance is centered around a laboratory providing students real world research and development experience, both partners benefit from the intellectual engagement. This paper discusses the benefits of a collaborative laboratory being developed in support of the modeling and simulation engineering program at Old Dominion University. The laboratory focuses on simulation-based test and evaluation (T&E) of autonomous vehicles, an important economic and social problem. Economically, driverless cars and drone delivery systems are the wave of the future. Socially there are issues of public acceptance of these systems as evident by public reaction to the infrequent, but highly public, accidents involving driverless cars. The laboratory allows academia and industry to address these important problems by improving the T&E of these systems while also improving student skills, giving undergraduate and graduate students an opportunity to participate in research. © 2018 IEEE

关键词： Autonomous vehicles

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Cyber resilience framework for industrial control systems: Concepts, metrics, and insights 16

Cyber resilience framework for industrial control systems: C...

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16th IEEE International Conference on Intelligence and Security Informatics, ISI 2018

作者： Haque, Md Ariful De Teyou, Gael Kamdem Shetty, Sachin Krishnappa, Bheshaj Modeling Simulation and Visualization Engineering Old Dominion University NorfolkVA United States Virginia Modeling Analysis and Simulation Center Old Dominion University NorfolkVA United States Risk Analysis and Mitigation Reliability First ClevelandOH United States

ISBN: (纸本)9781538678480

In this paper, we have analyzed the resilience property of industrial control systems (ICS) in the events of cyberattacks using subjective approach. We are proposing a comprehensive cyber resilience framework for the ICS by decomposing the resilience metric into a hierarchy of several sub-metrics. These metrics form a tree structure that has the potential to capture qualitative information about system's security and resilience posture and can be used as a high-level framework to identify where modeling and analysis are needed to be carried out. We present a brief description of resilient ICS characteristics and a cyber resilience assessment model for ICS. Finally, we present the cyber resilience metrics formulation methods and an illustration of resilience metrics calculation using Analytical Hierarchy Process (AHP). Our resilience framework can serve as a platform for a multi-criteria decision aid and help technical experts in identifying the gap in the study of ICS resilience. © 2018 IEEE.

关键词： Decision support systems

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Soft-sensing method of cohesive zone shape and position in blast furnace shaft

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IFAC-PapersOnLine 2018年第21期51卷 48-52页

作者： Zhou, Ping Jia-ling, Li Qi-quan, Wen En-xue, Zu Wei-hua, Gui Zhou, Chenn Q School of Energy Science and Engineering Central South University ChangshaHunan410083 China School of Information Science and Engineering Central South University ChangshaHunan410083 China Center for Innovation through Visualization and Simulation Purdue University Northwest HammondIndiana46323 United States

The cohesive zone in a blast furnace has an important influence on its smooth operation by affecting the distribution of gas flow, the permeability of the charge, and the temperature distribution. And the online sensing of the cohesive zone is a key problem to realize optimal operation of the blast furnace. In the present study, the soft-sensing method of cohesive zone was put forward by integrating its off-line CFD calculation with the on-line measurement of the cooling water information. The database with shape and position of cohesive zone was established under different charging patterns and descending speeds of burden based on the CFD off-line calculation. The descending speed of the burden was derived from the root position of the cohesive zone which was determined by the cooling water information. Then, the shape and position of cohesive zone was matched with that in the database by means of the charging pattern and the descending speed. Thus, it is possible to obtain on-line the shape and position of cohesive zone of blast furnace based on the charging pattern and the cooling water information. © 2018

关键词： Blast furnaces Computational fluid dynamics Cooling Cooling water Database systems Flow of gases Gas permeability Cohesive zones Distribution of gas On line measurement Optimal operation simulation Soft sensing method soft sensing Water informations

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Analysis of thermal homogenization in a steel refining ladle using bottom gas injection

Analysis of thermal homogenization in a steel refining ladle...

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AISTech 2018 Iron and Steel Technology Conference and Exposition

作者： Lee, Justina Yan, Dan Silaen, Armin K. Oltmann, Helmut Pitts-Baggett, April Thapliyal, Vivek Pretorius, Eugene Zhou, Chenn Q. Center for Innovation Through Visualization and Simulation Purdue University Northwest 2200 169th Street HammondIN46323 United States Nucor Steel 3401 Process Dr NW DecaturAL35601 United States

ISBN: (纸本)9781935117728

In a steel refining ladle, heat loss from liquid metal to the refractory lining of the ladle is inevitable, and control of metal temperature is important to ensure good quality of steel. In this paper, a 3D computational fluid dynamics (CFD) technique is used to simulate transient multiphase flow and heat transfer in the ladle. For multiphase flow, a VOF (volume of fluid)Lagrangian approach is used. In the heat transfer model, non-uniform heat loss from the side wall to ambient air is considered. The temperature distribution in molten steel and the effects of different initial wall temperatures on melt thermal homogenization are examined and analyzed. © 2018 by AIST.

关键词： Heat transfer

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CFD modelling and optimization of oxygen supply mode in KIVCET smelting process

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Transactions of Nonferrous Metals Society of China 2019年第7期29卷 1560-1568页

作者： Jia-dong LI Ping ZHOU Zhou LIAO Li-yuan CHAI Chenn Q. ZHOU Ling ZHANG School of Energy Science and Engineering Central South UniversityChangsha 410083China Zhuzhou Smelter Group Company Limited Zhuzhou 412004China School of Metallurgy and Environment Central South UniversityChangsha 410083China Center for Innovation through Visualization and Simulation Purdue University Northwest2200 169th StreetHammondIN 46323USA Changsha Nonferrous Metallurgy Design and Research Institute Company Limited Changsha 410019China

The influence of oxygen supply mode on the KIVCET (a Russian acronym for flash?cyclone?oxygen?electric?smelting) process was investigated using numerical simulation. The mass rate ratio (MRR) of central oxygen to lateral oxygen of the central jet distributor (CJD) burner was defined to express the oxygen supply mode, and the KIVCET process with an MRR ranging from 0.09 to 0.39 was simulated. The results show that there are four efficient reaction regions that correspond to four CJD burners. A higher central oxygen flow improves the mixing between particles and oxygen, thus enhancing reactions and shortening the reaction regions. However, a higher dust rate is induced due to the spread of the particle columns. The optimal MRR for a KIVCET furnace with a smelting capacity of 50000 kg/h is suggested to be 0.31. In this case, the chemical reactions associated with the feed are completed with an acceptable dust rate.

关键词： KIVCET furnace central jet distributor (CJD) burner computational fluid dynamics (CFD) central oxygen lateral oxygen optimization

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Safe2Ditch Steer-to-Clear Development and Flight Testing

Safe2Ditch Steer-to-Clear Development and Flight Testing

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Conference on Digital Avionics Systems (DASC)

作者： Bryan J. Petty Patricia C. Glaab Louis J. Glaab Simulation and Visualization Analytical Mechanics Associates Hampton Virginia United States of America Aeronautical Systems Analysis Branch NASA Langley Research Center Hampton Virginia United States of America Aeronautics Systems Engineering Branch NASA Langley Research Center Hampton Virginia United States of America

ISBN: (数字)9781728106496

ISBN: (纸本)9781728114972

This paper describes a series of small unmanned aerial system (sUAS) flights performed at NASA Langley Research center in April and May of 2019 to test a newly added Steer-to-Clear feature for the Safe2Ditch (S2D) prototype system. S2D is an autonomous crash management system for sUAS. Its function is to detect the onset of an emergency for an autonomous vehicle, and to enable that vehicle in distress to execute safe landings to avoid injuring people on the ground or damaging property. Flight tests were conducted at the City Environment Range for Testing Autonomous Integrated Navigation (CERTAIN) range at NASA Langley. Prior testing of S2D focused on rerouting to an alternate ditch site when an occupant was detected in the primary ditch site. For Steer-to-Clear testing, S2D was limited to a single ditch site option to force engagement of the Steer-to-Clear mode. The implementation of Steer-to-Clear for the flight prototype used a simple method to divide the target ditch site into four quadrants. An RC car was driven in circles in one quadrant to simulate an occupant in that ditch site. A simple implementation of Steer-to-Clear was programmed to land in the opposite quadrant to maximize distance to the occupant's quadrant. A successful mission was tallied when this occurred. Out of nineteen flights, thirteen resulted in successful missions. Data logs from the flight vehicle and the RC car indicated that unsuccessful missions were due to geolocation error between the actual location of the RC car and the derived location of it by the Vision Assisted Landing component of S2D on the flight vehicle. Video data indicated that while the Vision Assisted Landing component reliably identified the location of the ditch site occupant in the image frame, the conversion of the occupant's location to earth coordinates was sometimes adversely impacted by errors in sensor data needed to perform the transformation. Logged sensor data was analyzed to attempt to identify the primary er

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Flow and thermal stress analysis of a blast furnace blowpipe

Flow and thermal stress analysis of a blast furnace blowpipe

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AISTech 2018 Iron and Steel Technology Conference and Exposition

作者： Lee, Justina Walla, Nicholas Silaen, Armin K. Goodloe, Dale D. Zhou, Chenn Q. Center for Innovation through Visualization and Simulation Purdue University Northwest 2200 169th Street HammondIN46323 United States ArcelorMittal Iron Producing 3001 Dickey Rd. East ChicagoIN46312 United States

ISBN: (纸本)9781935117728

In blast furnace operation, the blowpipe that delivers hot blast air is constantly operated and undergoes wear in a high-temperature and high-pressure environment. Computational fluid dynamics (CFD) is used to simulate the flow pattern of hot blast air and heat transfer in a blowpipe. The information generated from CFD simulation is used to provide input conditions for mechanical simulation of thermal stress. Areas of failure corresponding to high stresses and plastic strain are identified. In this investigation, a parametric study is carried out to help optimize blowpipe design. The study findings can be used as guidelines for new blowpipe design, with reduced failure and better reliability. © 2018 by AIST.

关键词： Blast furnaces

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