bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Piston Seal Performance of Pure Water Cylinder of Hydraulic Support
Authors: Zhou Xinjian , Shao Hongbin 
Published: August 2021

Abstract
Taking the piston seal of pure water hydraulic cylinder of hydraulic support as the research object, the sealing performance and damage characteristics are compared and analyzed for mountain seal and drum seal structures under different compressions and working medium pressures by the ANSYS Workbench. The two-dimensional axisymmetric models for the two structures are established. The compression deformation and stress of mountain seal ring and drum seal ring are simulated by setting different amount of compression and medium pressure. Findings showed that the most vulnerable area of the mountain seal ring is in the middle of the contact surface with the cylinder, and that of the drum seal ring is in its outer edge. The maximum contact stress of both the structured sealing rings increased with the increase of the medium pressure, and is always greater than the medium pressure, indicating good sealing performance. With the increase of compression and working medium pressure, the sealing performance of both kinds of rings decreased. When applied to the same piston, the sealing performance of mountain seal is better than that of drum seal under the same compression amount and medium pressure.
Experimental investigation of the heat transfer characterization of multiple microjet impingement cooler
Authors: Sun Jian , Du Haiquan , Zhou Peng , Zhang Renping , Alvarado Jorge 
Published: August 2021

Abstract
In this paper, a new type microjet with a return channel was designed and constructed from plastics using 3-Dimensional print techniques. The array of 12 microjets with diameter 3mm was tested using high pressure (17.3KPa-275.8 KPa) air as coolant for jet diameter Reynolds number from 1.5 × 103 -6.75 × 103. The effects of the design parameters such as standoff that is the distance of the nozzle exit to the heated surface were analyzed under different input power and Reynolds number. The pressure drop and COP of the cooler were explored under different conditions in the present study.
The Flow Instability Analysis for Steam Generator for China Experimental Fast Reactor (CEFR)
Authors: Zhu Lina , Wu Zhiguang , Yan Xiangyu 
Published: August 2021

Abstract
Steam generator plays an important role in nuclear power plant, especially in a fast reactor. As a barrier to separate the high temperature sodium and high pressure water/steam, it is important to make sure the safety of the steam generator. For this purpose, it is necessary to guarantee that there is no flow instability happened in the tubes of the steam generator. In order to ensure that the steam generator is stable in all conditions, this paper uses the method of Khabenskii to calculate the minimum inlet resistance coefficient to prevent flow instability in China Experimental Fast Reactor (CEFR) steam generator. The needed inlet resistance coefficient calculated is 1001.2. In addition, this paper analysis the effect of mass flow rate, pressure, subcooling and thermal power on flow instability in steam generator of CEFR. The result demonstrates that the increase of flow rate, pressure and subcooling and the decrease of thermal power will stabilize the flow instability in CEFR steam generator.
Numerical study of the liquid sloshing in the cylindrical tank with baffles
Authors: Duan Linlin , Liu Cenfan , Ji Fang , Yang Zhirong , Zhang Chongchong 
Published: August 2021

Abstract
Many kinds of dangerous chemicals, like liquefied natural gas etc., are stored or transported in liquid state by pressure vessel. Liquid sloshing will occur in many scenarios such as during the geological disasters, and the transit operations. Sloshing might lead to large deformation or even damage to containers, causing serious safety threats. In this study, the sloshing phenomenon in a cylindrical tank with four baffle shapes are investigated. The volume-of-fluid (VOF) method is used to track the distorted and broken free surface. Fluid movement phenomenon in tank with different baffles is observed. The effect of four different baffles shapes is compared, impacting force on tank and baffle walls which induced by liquid sloshing is analyzed. Baffles openings affect the impact forces on the tank and baffle walls. More number of baffle orifices, liquid distribution is more even in sections of the tank. Maximum force value of y direction occurs as the liquid climbs up the tank ceiling. Reasonable number and position of baffle openings can increase the stability of the tank during driving. For this simulation method, more validation with experimental data is necessary, the same size of tank and four baffle shapes will be tested on the shaking platform.
Experimental Validation on Active Vibration Reduction System for 2.4m×2.4m Transonic Wind Tunnel Model
Authors: Yang Xinghua , Lv Binbin , Yu Li , Kou Xiping , Zeng Kaichun 
Published: August 2021

Abstract
An active vibration reduction system has been developed to solve pitch vibration problems of the force test models in 2.4m × 2.4m transonic wind tunnel. The twin flexure hinges structure types and PD control algorithm are used in the system. The constitution of active vibration reduction system is presented. The results of Ground Tests and wind tunnel tests are given. The influence of the system on the static signal of the balance and its performance are discussed. The ground tests show that the system can increase the damping of the sting more than tenfold. It is shown that the vibration amplitude decreases by more than 70% in wind tunnel tests. The wind tunnel tests also reveal that the active vibration reduction system has relatively strong performance on the suppression of the model vibration.
Numerical simulation on filling process of drag reduction agent in natural gas pipeline
Authors: Yin Xiaoyun , Jing Jiaqiang , Jing Peiyu , Sun Jie , Yuan Ying 
Published: August 2021

Abstract
In this paper, a numerical simulation is established to model the filling process of atomized natural gas drag reduction agent (DRA) at the pipeline inlet section. The computations are on the basis of the Euler-Lagrange method with the standard k-ε turbulence model. The effects of atomizing parameters on the droplets Sauter Mean Diameter (SMD) and the adsorption performance on the wall of pipe are investigated using the validated model. The results show that nozzle diameter and nozzle angle have little effect on the SMD of DRA droplets, whereas the size of the droplets SMD reduces with the increase of atomizing pressure, and the influence of atomizing flow rate is just the opposite.
Finite element analysis of temperature field of nuclear fuel cladding tube
Authors: Shu Linghong , Dong Yunqiao 
Published: August 2021

Abstract
In this paper, the finite element software ANSYS is used to analyse the influence of the eccentricity of nuclear fuel pellet on the temperature field of the cladding tube. Furthermore, transient heat conduction analysis of a single fuel rod during a loss of coolant accident is carried out. It can be found that the pellet bias has little effect on the temperature difference between the inner and outer walls of cladding tube, but it has a great influence on the temperature of the pellet center. The results obtained by transient analysis show that the cladding tube will melt within 738 seconds in the loss of coolant accident.
Design of outlet pipeline diameter and flow rate of the variable head water flow standard facility based on CFD method
Authors: Li Haiyang , Zhang Liang , Xu Junlong , Chen Yuyang , Zhang Jinming 
Published: August 2021

Abstract
This paper introduces a method of designing the diameter and flow rate of the outlet pipeline of variable head water flow standard facility based on CFD method. And the procedures of geometric model design, mesh generation, parameter setting and numerical calculation are illustrated. Then it is concluded that the instability of the gas-liquid interface will not occur in the facility in the process of water falling, under the condition of the maximum design flow rate of 25000m3/h and the outlet pipeline of 3.0m diameter. Then it is also found that there is possibility of further expanding the diameter and flow rate of the standard facility. The numerical result has practical significance for the design and flow field analysis of the variable head water flow standard facility with diameter-change section in the main water tower.
Regression Analysis of the Heat Balance Thickness of a Blast Furnace Hearth Lining
Authors: Che Yuman , Wang Lei , Chen Liangyu 
Published: August 2021

Abstract
The reasonable structure and operation of a hearth can reduce the probability of serious depression and erosion of the lining of a blast furnace (BF). The temperature of the hearth lining is high inside and low outside. Theoretically, there is a heat balance state in the hearth. A three-dimensional computational fluid dynamics (CFD) calculation model that can simulate the theoretical heat balance state of the lining for different hearth design structures and operating parameters was established in this paper. Based on the calculation model, the response surface method was used to study the regression relationship between different factors and the thickness of the lining. In addition, the sensitivity of each factor to the thickness in a state of heat balance was evaluated. The analysis results showed that the blast furnace volume utilization factor and tapping temperature had a greater impact on the theoretical heat balance thickness of the hearth lining. These two factors had an obvious interaction. With the increase in the blast furnace volume utilization factor, the sensitivity of the heat balance thickness to the tapping temperature gradually decreased. The cooling water flow rate had a small effect on the heat balance thickness. The theoretical basis for the optimization of the hearth structure and the improvement of the operation method was provided in this paper.
Numerical simulation study on the volcanic gas reservoirs in block C of Xushen Gasfield
Authors: Geng Xiaoming 
Published: August 2021

Abstract
Block C of Xushen Field is one kind of the volcanic reservoirs with the bottom water. Since the development, the dynamic characteristics of the block are characterized by large differences in gas well productivity, formation water production, and low effective utilization of reserves. Using the dual-medium numerical model, through historical simulation and combination with gas well dynamic, the block pressure and, water body changes and remaining reserves distribution characteristics are clarified. The research shows that the remaining reserves of the block are mainly concentrated in the vicinity of xs901, xs903-p1 and the northwest periphery of xs902. With the increase of production allocation, the water production of six old wells such as XS9-7 increased rapidly and significantly, while the bottom water coning was obvious. Through six sets of gas production rate development plans with different magnification, consider whether the gas distribution can stabilize the output, water production, bottom hole flow pressure, and fluid accumulation. The optimal development plan of the old well in the block is determined comprehensively.
How pandemic and the industry 4.0 era constraint: the perspective of authentic leadership on innovation
Authors: Yunita Tyna , Prabowo Harjanto , Manurung Adler Haymans , Hamsa Mohammad 
Published: August 2021

Abstract
The COVID-19 crisis brought the importance of interdisciplinary knowledge to the forefront. Scholars carry out online communication and learning, instead of relying on face-to-face meetings at the conference, and are more proactive in disseminating their research online, which will achieve more success due to the higher number of readers citations. Remote work behaviour facilitated technology adoption in the era of industry 4.0 will affect company innovation. Then the authentic leaders who have the vision and views in industry 4.0 and are faced with pandemics will increase the level of innovation of these leaders. This research cannot be generalized to the industry in general but can be a reference for future researchers. 4.0 and corporate culture
Maximum deflection of three span continuous bridge using rotation data based on 3 dimensional model
Authors: Suangga M. , Haripriambodo T. 
Published: August 2021

Abstract

The Structural Health Monitoring System on the bridges continue to develop to ensure that the bridge being monitored is in good condition to serve traffic. One of the main bridge’s parameter observed is deflection of the bridge. Various methods has been developed to be able to monitor deflection accurately and economically. This study presents a method of determining the maximum deflection of a three-span continuous bridge using rotation data obtained from a tilt meter with linear regression. Initial data were obtained from FEM simulations under various load conditions to obtain the maximum deflection value and the rotations. Furthermore, linear regression was carried out to obtain the relationship between the four rotational data and the maximum deflection. The accuracy of the maximum deflection value is then compared with the results of the analysis using FEM. The accuracy rate obtained in this study is about 93.6%.
Development of Eco-Airport Model to Measure Environmental Noise Footprint in Supporting Airport Sustainability
Authors: Sardjono Wahyu , Kusnoputranto Haryoto , Soesilo Tri Edhi Budhi , Kristanto Gabriel A. 
Published: August 2021

Abstract
Among a set of tools to emerge in recent years in environmental management, one appears to meet the criteria necessary to bridge this gap is the environmental footprint analysis based on biophysical reality of sustainable living, people must use natural renewable products and services not sooner than they are replacedand produces no waste faster than nature can absorb. The purpose of this study is to develop a model of noise environment footprint toward sustainability airport with the environmental assessment at Soekarno-Hatta International Airport. The results showed that the airport ecological footprint of the model can be built through the factors analysis that can give an idea of the influence of ecoairport. The conclusion of this study is to obtain the noise ecological footprint provides a method for the total impact of air transport to be assessed, the ecological footprint can be used as a communication and awareness tool to inform communities about the impact they make. It can lead to shifts to public transport for airport access, ecological footprint can be used by airports and airlines to identify operations where energy efficiency measures can be made and where resource consumption can be reduced
Modeling existing buildings three-dimensional (3D) using unmanned aerial vehicles: A study case in Binus Syahdan Campus Building
Authors: Hidayat Irpan , Suwondo Riza , Suangga Made , Aufar Pahlevi Casey 
Published: August 2021

Abstract
Developments in the field of photogrammetric technology using UAV (Unmanned Aerial Vehicle) make it easier to represent mapping results quickly and accurately. Along with the growing need for spatial use, both horizontally and vertically, have implications for the need of accurate spatial data both in two-dimensional (2D) or three-dimensional (3D) space. 3D visualization and modeling is a representation of the surface of the earth with the aim of supplying the appearance of the earth along with the whole above it more realistic and able to provide a broader perspective compared to 2D visualization or conventional maps. In this study, the drone-based UAV was used, namely DJI Mavic Air to collect geometric data on the Syahdan campus. The digital data that has been recorded by the UAV is then processed into three-dimensional modeling using DroneDeploy software. DroneDeploy software is cloud-based and is generally used for aerial mapping, in this study it is used in making 3D modeling because of its efficient. The elevation data at each building point measured using a drone-based UAV are compared with the as-built drawing of the Syahdan Campus, Binus. The root mean square value of the comparison of elevation distance between 3D model and as built drawing is 0.47 meters.
Effects of Pile Configuration on The Behaviour of Jetty Structure Subject to Lateral Loads
Authors: Siagian Gerardo H.M. , Setyandito Oki , Suwondo Riza , John Pierre Andrew 
Published: August 2021

Abstract
Piles are structural elements which play an important role to carry loads and transfer them to the ground. In a jetty structure, the critical lateral loads supported by piles are mostly from Liquid Natural Gas (LNG) vessels. This research investigates various pile configuration such as pile diameter (40 cm, 60 cm, and 80 cm), distance between pile (2,5 m and 5 m), and the slope of the pile (straight pile and sloping pile with the ratio 1:8). A series of analysis has been conducted using SAP 2000 program. The analysis results show that a smaller pile deflection can be obtained if a large diameter pile is used, distance between piles is 2.5 m, and the type of piles being installed is a sloping pile.
Analysis of Earth Retaining Walls Reinforced by Metallic Strip or Geogrid
Authors: Suhendra A , Sutikno  , Lie J L , Mahardika I G 
Published: August 2021

Abstract
Earth retaining wall is a structure used for keeping and maintaining two different ground elevations. In application, sometime the earth retaining walls will combine with reinforcement element to increase the safety factor and any other reasons.Metallic strip and geogrid reinforcement which utilize friction between the fill material and reinforcement elements is one of the common applied. There are passive and active pressures in earth retaining wall analysis, whichare influenced bythe anchorage length. The analysis will compare the influence of passive pressure to its anchorage length. Moreover, the safety factor of the metallic strip and geogrid reinforcement will be compared with computer software. Since no specific element of metallic strip, the analysis will be conducted through an approach of geogrid and plate element. Passive force calculation on earth fill in the front of the retaining wall with a height of 12 m could shorten the anchorage length by 0.25% for 0.6 m depth; 0.38% for 0.7m depth; and 0.88% for 1.5 m depth. Hence, passive force does not have to be calculated as it gives a little difference in anchorage length compared to anchorage length calculation which ignores the passive force. Geogrid and plate elements used for modelling metallic strip in PLAXIS gives safety factor with a difference of 0.7%-3.4% and share similar landslide pattern. Therefore, metallic strip can be modelled using an approach of geogrid and plate element. The case study project shows the safety factor of geogrid and metallic strip reinforcement is minimum 1.2. However, geogrid reinforcement has 13.7%-31.4% higher safety factor compared to metallic strip.
Water Management Evaluation for Upgrading Tidal Irrigation System, Katingan, Kalimantan
Authors: Fauzan A Khomaini , Wignyosukarto Budi S , Jayadi Rachmad 
Published: August 2021

Abstract
Due to channel sedimentation, water deficits and flood still becomes problems in Katingan tidal irrigation system, while the stakeholder plans to reclaim new area in the presence of pyrite soil. This research aims to overcome these problems through four water management scenarios simulated using HEC-RAS to meet the needs of water supply, flushing and drainage. The result shows that water leaching requirement for existing area is 2.48 million m3 and could only be fulfilled by canal normalization. Moreover, extended network with narrow intake canal supplies less than 4.3 million m3 water leaching, so that wide canal connected to the river is required to facilitate more water flowing into the system. Related to flushing, installing pumps in the middle intake could increase canal circulation with one-way outflow during ebb tide, while the inflow depends on flap gates at the same position. Furthermore, the volume of rainwater is generally able to be discharged for every rainy day by all scenario designs. However, existing condition and network expansion with narrow intake canal have less rainwater deficit duration. In conclusion, leaching and drainage aspects require more water storage and wide canal intake, where flushing criterion need the use of pumps and gates.
Perception Analysis of Airport Noise on Environment, Sosial, and Economic at Halim Perdana Kusuma Airport
Authors: Sardjono Wahyu , Kusnoputranto Haryoto , Agrayanto Bagus Ferry , Soesilo Tri Edhi Budhi , Kristanto Gabriel A. 
Published: August 2021

Abstract
The increase in aircraft noise is an inevitable impact of Halim Perdanakusuma Airport (HLP) commercial operations since 2014. The perception of noise risk from people living around airports is a factor that must be considered for formulating strategic, comprehensive airport noise control plans and policies, and participatory. The purpose of this study is to analyze the noise conditions and the perception of environmental noise risk to the perception of socioeconomic risks that live around the HLP Airport. The results of the WECPNL calculation in area of Jaticempaka and Makasar was ranged between 73.80—79.72. The environmental noise risk of the community in HLP Airport’s vicinity was studied from knowledge aspects, perception aspects, and behavior aspects. Most of respondent were in the moderate category of environmental noise risk knowledge and environmental noise risk perception. While for environmental noise risk behavior aspects most respondent were in the low category. The social and economic risk perception for most respondent were in the moderate category. The conclusion of this research is that the community settlements in HLP Airport’s vicinity at the distance of 300 m and 600 m does not meet the environmental noise standard for a residential area which is regulated at 55 dB(A). The ideal area for settlement use in the vicinity of HLP Airport is Makassar area which is located 600 m from HLP Airport’s runway.
Selection of subcontractor vendor using analytic hierarchy process (AHP) method in construction company
Authors: Ariyanti Fransisca Dini , Putri Annatania Calista 
Published: August 2021

Abstract
Sub-contractor vendor is the one of the most important aspects for the construction company to finish the project. Failures in vendor selection could lead to severe impact of project on time, on quality and on budget. The selection of sub-contractor criteria is the initial stage in the decision-makingprocess by procurement. This research use multi criteria decision making, with Analytic Hierarchy Process method. Super Decision Software is used to help in obtaining weight and ranking values. The purpose of this research is to determine the criteria in selecting vendor and choosing the best sub-contractor vendor. Criteria in selecting subcontractors shall comply Indonesia’s Government law & policies which classify into six aspects, namely legal aspects, technical aspects, financial aspects, managerial aspects, safety aspects, and aspects of the vendor’s reputation. Based on company data, there are 3 candidates of sub-contractor vendors who will be selected in doing project work. The results showed that the priority on the criteria for safety aspects gained a weighting of 33.9%, the priority in the sub-criteria was coordination in the project with a weight of 63%, and the priority of the vendor which was vendor B with a weight of 36.7%.