bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Hydrodynamic Impact of the South-to-North Water Diversion Project on the Lower-reach Lake of Nansi Lake
Authors: Yue Junjie , Sang Guoqing , Wang Haijun 
Published: August 2023

Abstract
In order to study the changes in hydrodynamic characteristics of the lower-reach lake of Nansi Lake, this paper established a two-dimensional hydrodynamic model of the lower-reach lake of Nansi Lake based on topography, like rainfall, evaporation, and wind field of the lower-reach lake of Nansi Lake, and carried out water level verification, which is representative and can reflect the process of water level and flow velocity changes of the lower-reach lake of Nansi Lake before and after the South-to-North Water Transfer. The model results show that, before the Nansi Lake was connected to water, the lake area of Zhaoyang Lake in the north was long and narrow and the water level was high. The overall flow velocity of Weishan Lake was low, and the stagnant water area and low flow velocity area accounted for a large proportion. After the opening of the southern four lakes, the high-water level area is concentrated in the wide Weishan Lake area, the water level in the Zhaoyang Lake area is reduced, and the changes between different water level gradients tend to be gentler, and the mobility of the water body is greatly improved.
Analytical Research on the Flow Resistance Characteristics of Low-noise Ball Valves Based on Computational Fluid Dynamics Technology
Authors: Yan Xiaozhe , Wang Gang , Xiong Jinying 
Published: August 2023

Abstract
The flow resistance characteristics of a low-noise ball valve applied to a system were numerically simulated and investigated via computational fluid dynamics (CFD) software. Then, the flow resistance characteristics of normal-temperature water and steam as the media for the low-noise ball valve under different flow velocities were analyzed, followed by an experimental study and a comparison with the numerical simulation result. The study results reveal that the numerical simulation results of flow resistance characteristics are highly consistent with experimental results, thus verifying the effectiveness of numerical simulation. With the fixed opening of the valve, the flow resistance characteristics of the valve remain unchanged instead of changing with the medium and flow velocity.
Flow Conditioner Design and Analysis Based on Computational Fluid Dynamics
Authors: Fan Yuguang , Lv Yan , Gao Lin , Xie Fan , Men Jiacheng 
Published: August 2023

Abstract
To address the issue of uneven gas flow velocity distribution upstream of natural gas pipeline flow meters, a wave-type fin flow conditioner was designed. The Computational Fluid Dynamics (CFD) numerical simulation method was used to analyze the velocity distribution inside the pipe, and the rectification effect of the flow conditioner was measured by using the offset degree and the minimum length of the straight pipe section. The offset degree at a specific downstream section was calculated when the fluid passed through a 90 degrees elbow spoiler component without a flow conditioner with an Etoile conditioner and wave-type flow conditioner. The results show that the wave-type flow conditioner has a better rectification effect, and the minimum straight pipe section length is shortened by 72% compared to without a flow conditioner, greatly reducing the pipeline design cost and improving the accuracy of measurement of the Ultrasonic flowmeter.
Ocean Turbulence Observation Techniques and Data Processing Algorithms based on SAR Sequence Images
Authors: Xu Junru 
Published: August 2023

Abstract
Waves in the ocean are a widespread phenomenon and their effective detection requires the use of high-resolution, large-area detection devices. Synthetic aperture radar (SAR), with its all-weather performance and high resolution, is often used for the detection and imaging of both land and ocean, as well as large-area, high-resolution SAR and interferometric SAR, which are all based on SAR enhancements. This has become an important area of research in marine sensors, and the use of multiple-input multiple-output (MIMO) reception modes for detection and imaging of large-area, high-resolution SAR data has become one of the research priorities for obtaining large-area, high-resolution SAR data. Oceanic internal waves generate internal mixing of seawater through unstable fragmentation, which is an important mechanism for maintaining the meridional overturning circulation within the ocean, and the strong currents and strong mixing processes generated by large amplitude internal waves carry enormous energy. The main objective of this paper is to investigate ocean turbulence observation techniques and data processing algorithms based on SAR sequence images. The research is of great significance for the development of marine science, and the technical areas studied are of great research significance for the development of the marine economy, breakthroughs in marine research technology, and the development of the marine industry.
Design and Hydrodynamic Performance Analysis of a Two-module Wave-resistant Floating Photovoltaic Device
Authors: Kang Wenhui , Lian Zixiang , Han Yue 
Published: August 2023

Abstract
This study presents a two-module wave-resistant floating photovoltaic device, featuring a photovoltaic installation capacity of 0.5 MW and triangular configurations for both modules. Flexible connections are employed between the two modules, and semi-tensioned mooring cables are used in the mooring system. The system is analyzed for a specific sea area in Zhejiang, China. Based on three-dimensional potential flow theory, frequency and time domain analysis are conducted to obtain the motion response of each module under given sea conditions, as well as the forces acting on the connecting structures and mooring cables. The hydrodynamic performance of the floating photovoltaic device is compared under different wave directions. The results show that the designed floating photovoltaic device can resist irregular waves with a significant wave height of 4.5 m and a spectral peak period of 10 s. Compared with other conditions, the motion response of the floating photovoltaic device is relatively stable, the maximum force of each connecting structure is smaller, and the overall hydrodynamic performance is the best under the 0°wave condition.
Numerical Study of Flow and Particle Deposition in a Block Duct
Authors: Yin Kang , Xiong Feng , Sun Ke 
Published: August 2023

Abstract
The primary of this study is to evaluate the characteristics of airflow organization and particle deposition in blocked ducts with various subgrid models. Five popular sublattice models are chosen to conduct this and the LES method is utilized to simulate the flow field and particle deposition properties of the duct. The results demonstrate that the features of the flow field varied amongst the different sub-grid models. The Smagorinsky and WALE models provide comparable findings, with only one pair of separated vortices in the leeward region. With small separated vortices and a small vortex structure near the wall in the leeward region, the WALES model, the WALES-Omega model, and the KET model are more informative. Simultaneously, a large number of particle groups with particle sizes ranging from 1nm to 50μm were selected for particle phase analysis. It was discovered that the deposition velocity of ultrafine particles below 1μm steadily reduced as particle size grew, whereas the deposition velocity of particles larger than 1μm rose as particle size increased.
Characteristics of secondary flow vorticity and longitudinal velocity in a sharp bend
Authors: Sun Yi , Yi Xiaoyan , Ma Jing , Tian Yong , Gu Zhigang 
Published: August 2023

Abstract
The complex flow structure in sharp bends may cause a series of water and sediment problems which are of great risk to flooding control and engineering safety. For this reason, there is of great significance to study the characteristics of secondary flow in sharp bends. In this article, the characteristics of vorticity and longitudinal velocity in sharp bends are studied by laboratory experiments and theoretical analysis. The results showed that there are two opposite circular currents on every cross-section in the bend. The two circular currents show a trend of increasing and decreasing streamwise. Vorticity is used to indicate the secondary flow intensity and is used to adjust the formula of longitudinal average velocity. The new formula fit the experiment data well and can describe the phenomenon of the maximum longitudinal average velocity appearing near the bed surface.
New Type of FTU Considering Small Hydropower Access and Its Test Verification
Authors: Li Kewen , Ding Tao , Liu Lin , Ou Shifeng 
Published: August 2023

Abstract
The access to distributed power sources such as small hydropower (SHP) makes the distribution system present a multi-power supply pattern, which has an adverse impact on the voltage-time type feeder automation (VTFA) suitable for a one-side power supply system. In view of this influence, this paper proposes a new type of feeder terminal unit (FTU) for VTFA, which has a new energy access processing mode. In this mode, in case of phase-to-phase short-circuit fault (PTPF) or single-phase grounding fault(SPGF) in the system, after the feeder’s outlet circuit breaker (OCB) of the substation trips, the FTU shall be able to make the corresponding switch to cut off SHP as soon as possible before the OCB’s re-closing, so as to prevent affecting the realization of VTFA. To verify that VTFA equipped with the new type of FTU can still work normally under SHP access, a feeder automation (FA) test platform is built based on RTDS, and the test results show that the expected goal is achieved.
2D Structural Design and Numerical Simulation of a New Type of Fairing
Authors: Xie Wenbin , Le Guigao 
Published: August 2023

Abstract
Based on the existing fairing, the 2D structure of the fairing is improved. Through the numerical simulation of the shape and height of the spoiler structure of the fairing, and the analysis and comparison of the obtained data, the fairing structure with good vortex-induced vibration suppression is designed. The results show that H = 6.5 mm’s semicircular spoiler structure with 45° tail-angle fairing on the middle line of the side has a good effect on suppressing vortex vibration.
Overall Design of Multi-module Offshore Floating Bridge and a Method for Random Analysis of Anchor Tension
Authors: Lu Yi , Guo Jianting , Zhu Yiming , Zhu Shaowen 
Published: August 2023

Abstract
This paper proposes a multi-module floating bridge design for offshore applications and establishes a coupled motion response analysis method for the anchoring system of the floating bridge. Time-domain coupled analysis is performed under the combined effects of wind, wave, and current loads, resulting in the maximum tension of the anchor chain in random waves. Using the typical island and reef sea area of Zhoushan, China as an example, the randomness of waves is considered, and a random sampling method is adopted. The main configuration, connection structure, and mooring system design schemes are presented, and the maximum tension of the anchoring system is numerically calculated and analyzed. The random distribution of the maximum anchor chain tension is obtained, the goodness-of-fit test is conducted for the fitting results, and the main degree-of-freedom motion response is analyzed under different exceedance probabilities. The results show that the multi-module offshore floating bridge meets the design requirements, and the statistical characteristics of the maximum tension of the anchor chain under random waves conform to the Gumbel distribution. The mode of the random distribution of the maximum anchor chain tension increases by 7.65% when fully loaded compared to the unloaded condition. In different exceedance probability scenarios, there are significant differences in the maximum tension of the anchor chain and the motion response of the main degrees of freedom of the floating bridge.
Comparative Study and Analysis of Cryogenic Storage Tanks with Different Storage Energy Media
Authors: Yang Fan , Zhang Chao , Zhang Bochao 
Published: August 2023

Abstract
Liquefied natural gas (LNG), ethylene, ethane, propane, and other clean energy are often stored in a cryogenically frozen state on a large scale. As the core equipment of cryogenic energy storage tanks, if different cryogenic energy media are stored, there are certain differences in the design of the storage tanks. Although the design specifications differ little, there is a lack of systematic research. This paper compares the material, process, structure, construction, and commissioning of cryogenic storage tanks such as ethylene, ethane, propane, and LNG storage tanks, and studies the feasibility of replacing C2 and C3 refrigerated hydrocarbon storage tanks with LNG storage tanks. The results show that different refrigerated hydrocarbon storage tanks have common points in terms of design and construction standards, design processes, outer tanks, and cold insulation materials, while differences in internal tank materials, medium density, temperature, and other aspects lead to differences in technology, structure, construction, start-up, and commissioning. It is concluded that C2 cryogenic storage tank is theoretically feasible to replace with the LNG storage tank, while C3 cryogenic storage tank is not suitable to replace with the LNG storage tank due to the high design temperature of the inner tank material.
Numerical Study of Proppant Transport in Intersected Fractures for Supercritical Carbon Dioxide Fracturing
Authors: Liu Boyu , Yao Jun 
Published: August 2023

Abstract
This study employs Computational Fluid Dynamics (CFD) method to simulate particle transport in supercritical carbon dioxide fracturing. A dynamic leak-off model is integrated into the Eulerian-Eulerian two-fluid model. It systematically examines the transport of different-sized proppants in intersected fractures with leak-off and investigates the effects of proppant size, bypass fracture width, inter-fracture angle, and pumping schedule on the proppant distribution. Results show that the proppant split ratio increases with an increase in bypass fracture width and inter-fracture angle. Injecting larger-sized proppants before smaller-sized proppants can enhance the proppant bed length and height while reducing the proppant split ratio.
Numerical Simulation of Karst Collapse in Qingling Town, Wuhan
Authors: Chen Dongqin , Cao Yi 
Published: August 2023

Abstract
With background information on the geological conditions of Fenghuo village, Qingling town, Wuhan, based on Terzaghi consolidation theory and GMS software, a hydrodynamic-mechanics coupling model was established. On the basis of simulating the groundwater flow field by GMS software, a mechanical calculation program was developed, and the coupling simulation of hydrodynamic mechanics was achieved. The results showed that the stress state, vertical deformation, and damage of soil are closely related to the underground water flow. The soil pressure value and effective stress value are relatively low from July to August every year. It is the result of buoyancy produced by groundwater. Soil settlement generally occurs in the dry season. When the load is not considered, the deformation value of soil settlement is generally less than 6 mm. In the wet season from July to August every year, the soil will float up, and the floating value is less than 4 mm. The groundwater table changes frequently, and the destruction around the cave body eventually leads to karst collapse.
Measured Impedance Characteristic of T-connection Transmission Line with DG
Authors: Yang Shuqiang , Liu Yiqing , Zeng Fanyong 
Published: August 2023

Abstract
In Active Distribution Network (ADN), T-connection transmission lines are formed when Distributed Generations (DGs) are connected to transmission lines rather than to buses. In the T-connection transmission line with DG, the pilot current differential protection loses selectivity due to the change of fault current caused by T-type connection DG. Differential current increases to as much as the injected DG current when an external fault occurs, which results in maloperation. The impedance differential protection using measured impedance characteristics can effectively distinguish the fault location and is not affected by DG. However, the impedance differential protection is only studied under the condition that DG is connected to buses to study the impedance differential protection for the T-connection transmission line with DG, it is necessary to analyze the measured impedance characteristics of the T-connection transmission line with DG. This paper classifies fault locations and analyzes the measured impedance characteristics of three terminals under the condition of each type of fault location. The simulations verify the correctness of the impedance characteristic analysis.
Application of Quality Inspection Data Association Rules in Measurement Terminal Based on MapReduce
Authors: Zhang Bo , Liu Yongping , Xia Xin , He Chuanliang , Zhen Guolong , Xu Pu 
Published: August 2023

Abstract
To solve the problem of not being able to intuitively lock the cause of defects when processing massive quality inspection datasets with multiple batches, types, and models of measurement terminals, a MapReduce-based Apriori algorithm is proposed. After the MapReduce algorithm model calculation, the processing efficiency of the quality inspection dataset has been significantly improved. Through the multi-node calculation and analysis of the single-phase electricity meter quality inspection dataset and the application of association rule mining, reasonable suggestions were given, which improved the professional value and quality supervision level of the quality inspection business.
Coordinated Optimization of Distributed Wind Power and Electric Energy Storage Technologies
Authors: Dang Qi , Zhang Yuechao , Yang Wei , Wang Yongli , Zhao Zhonghua , Qiao Jing 
Published: August 2023

Abstract
The location and capacity of distributed wind power (DWG) and battery energy storage (BES) in the distribution network affect the operation of the distribution network. To improve the consumption capacity of wind power and reduce the impact of uncertainty of wind power output on the operation of the distribution network, the optimal allocation of DWG and BES should be coordinated in the planning stage. In this paper, the stochastic tide of the wind-storage system is used to reflect the operation status and uncertainty of the distribution network with DWG and BES, and the maximization of the integrated return of equal annual value is used as the objective function to establish the opportunity constrained planning model.
Decentralized frequency support control based on distributed PV’s adaptive power reserve
Authors: Zhu Chongxi , Xu Hong , Gu Leichun , Hua Zhiwei , Li Xin , Feng Qifan 
Published: August 2023

Abstract
High integration of PV diminishes system inertia, which jeopardizes the system frequency stability. Adjusting PVs’ output according to demand is an active power control method requiring no energy storage devices, which realizes grid frequency support by a certain reserved power of PV. To equally reserve power between different PVs without communication, this paper combines the operation characteristics of the PV module on the right side of the maximum power point and proposes the characteristic of power reserve and adaptive power reserve-frequency supporting control. Furthermore, irradiance and temperature sensors, cumbersome mathematical computation, and accurate measurement of PV module parameters can be eliminated. Finally, simulations are provided to validate the effectiveness of the proposed control strategy.
Adaptive Coordination Control Based on Alkaline Water Electrolyzers and Battery Driven by Wind Power
Authors: Zhu Chongxi , Xu Hong , Gu LeiChun , Hua Zhiwei , Li Xin , He Hanghang 
Published: August 2023

Abstract
With the widespread use of clean energy sources, there has been a growing interest in obtaining green and pure hydrogen from wind power. However, wind energy is characterized by randomness and volatility, which results in a low grid connection rate for wind turbines and makes it difficult to integrate wind energy into the power grid. In this context, this article proposes an adaptive coordinated control strategy considering the wind turbine, alkaline electrolyzer, battery, and local loads. Using the DC bus voltage as the connecting signal, adaptive power control and voltage control methods are developed for the wind turbine, energy storage battery, and electrolyzer to achieve power matching in the system. Finally, the proposed research results are validated through Matlab/Simulink simulation module.
Application of Uncertainty Analysis in Distributed Planning of Urban Comprehensive Energy System
Authors: Yao Xueheng , Peng Yangjie , Li Lifan , Li Wenjing , Mao Xuyu 
Published: August 2023

Abstract
The conventional distributed planning method of urban integrated energy systems uses the LINMAP coupling model to obtain the optimal solution of planning, which is vulnerable to the impact of decision-making load demand, resulting in the final annual value of energy planning costs being too high. Therefore, it is necessary to design a new distributed planning method for urban integrated energy systems based on uncertainty analysis. Based on the analysis of uncertain factors, the mathematical model of equipment planning of the energy system is constructed, and combined with the energy storage relationship, the distributed planning operation algorithm of the integrated energy system is designed, thus completing the distributed planning of the integrated energy system. The experimental results show that the annual value of energy planning cost of different system equipment is low after using the designed distributed planning method of urban integrated energy systems based on uncertainty analysis, which proves that the designed distributed planning method has good planning effect, economy and certain application value, and has made certain contributions to reducing energy planning loss.
Control of isolated hydrogen generation power supply for the DC power grid
Authors: Teng Zhichu , Ji Mengbo , lv Chengcheng , Qian Xiangyi , Gui Jixiang , Zhang Jie 
Published: August 2023

Abstract
The utilization of water electrolysis hydrogen in DC power grids can effectively improve the absorption and utilization of renewable energy, and hydrogen production power supply is a key equipment. This article designs an isolated DC hydrogen production power supply, which adopts a bidirectional active H-bridge topology and power modular design. In the process of hydrogen production, the use of constant current and constant voltage control, the development of control strategies for the hydrogen production process but the input current ripple of the electrolytic cell is heavy, so the driving pulse interleaving phase shift between power modules is adopted. The hydrogen production power supply can achieve a hydrogen production process with a small current ripple, and the feasibility and effectiveness of the hydrogen preparation power supply control strategy have been verified through simulation and experiments.