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Development of a fan-stirred constant volume combustion chamber and turbulence measurement with PIV

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Frontiers in Energy 2022年第6期16卷 973-987页

作者： haoran zhao Jinhua WANG Xiao CAI Zhijian BIAN Hongchao DAI Zuohua HUANG State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China

A fan-stirred combustion chamber is developed for spherically expanding flames,with P and T up to 10 bar and 473 K,respectively.Turbulence characteristics are estimated using particle image velocimetry(PIV)at different initial pressures(P=0.5-5 bar),fan frequencies(ω=0-2000 r/min),and impeller diameters(D=100 and 114 mm).The flame propagation of methanol/air is investigated at different turbulence intensities(u′=0-1.77 m/s)and equivalence ratios(f=0.7-1.5).The results show that u′is independent of P and proportional toω,which can be up to 3.5 m/s at 2000 r/min.L_(T)is independent of P and performs a power regression withωapproximately.The turbulent field is homogeneous and isotropic in the central region of the chamber while the inertial subrange of spatial energy spectrum is more collapsed to-5/3 law at a high Re_(T).Compared to laminar expanding flames,the morphology of turbulent expanding flames is wrinkled and the wrinkles will be finer with the growth of turbulence intensity,consistent with the decline of the Taylor scale and the Kolmogorov scale.The determined S_(L)in the present study is in good agreement with that of previous literature.The S_(L)and S_(T)of methanol/air have a non-monotonic trend with f while peak S_(T)is shifted to the richer side compared to S_(L).This indicates that the newly built turbulent combustion chamber is reliable for further experimental study.

关键词： fan-stirred combustion chamber turbulence characteristics particle image velocimetry(PIV) methanol turbulent expanding flames

基于叠加原理的综合能源系统动态潮流追踪及碳熵分析

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电力系统自动化 2024年第1期48卷 10-20页

作者：王梦雪赵浩然刘春阳马后震电网智能化调度与控制教育部重点实验室(山东大学) 山东省济南市250061

用户侧碳排放指标的精确计算是引导用户低碳用能的关键。目前,综合能源系统的碳轨迹追踪方法仅停留在稳态,无法精准计算负荷变化大且动态过程长的气、热系统的碳排放指标。为此,基于叠加原理对动态气、热系统进行了潮流追踪与碳熵分析... 详细信息

用户侧碳排放指标的精确计算是引导用户低碳用能的关键。目前,综合能源系统的碳轨迹追踪方法仅停留在稳态,无法精准计算负荷变化大且动态过程长的气、热系统的碳排放指标。为此,基于叠加原理对动态气、热系统进行了潮流追踪与碳熵分析。首先,建立了基于气、热系统叠加特性的动态潮流模型,计及气网管存与热网传热时延,对系统进行动态潮流追踪,明确了系统内的源-荷潮流关系。然后,基于碳熵理论提出了气、热系统的动态碳熵分析方法,进一步明确了源-荷碳排放关系,形成了用户侧精细化碳指标。最后,以中国吉林省某地区综合能源系统为例进行动态潮流分析和碳熵分析,验证了模型的有效性,并与稳态碳轨迹追踪方法对比,验证了动态碳轨迹追踪的必要性。

关键词：综合能源系统叠加特性动态潮流追踪碳熵碳轨迹

Fuzzy logic based coordinated control of battery energy storage system and dispatchable distributed generation for microgrid

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Journal of Modern Power Systems and Clean Energy 2015年第3期3卷 422-428页

作者： haoran zhao Qiuwei WU Chengshan WANG Ling CHENG Claus Nygaard RASMUSSEN Department of Electrical Engineering Centre for Electric Power and EnergyTechnical University of Denmark2800 Kgs.LyngbyDenmark School of Electrical Engineering and Automation Tianjin UniversityTianjing 300072China Department of Electrical Engineering Tsinghua UniversityBeijing 100084China Siemens Wind Power 2800 Kgs.LyngbyDenmark

Microgrid is a good option to integrate renewableenergy sources (RES) into power systems. Inorder to deal with the intermittent characteristics of therenewable energy based distributed generation (DG) units,a fuzzy-logic based coordinated control strategy of a batteryenergy storage system (BESS) and dispatchable DGunits is proposed for the microgrid management system(MMS). In the proposed coordinated control strategy, theBESS is used to minimize active power exchange at thepoint of common coupling of the microgrid for grid-connectedoperation, and is used for frequency control for islandoperation. The efficiency of the proposed controlstrategy was tested by case studies using DIgSILENT/PowerFactroy.

关键词： BESS Coordinated control Fuzzy-logic based control Microgrid

基于动态分治的大规模多场站无人机应急救援优化方法

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北京邮电大学学报 2024年第1期47卷 65-71页

作者：苏立晨赵浩然郭通杜文博李宇萌北京航空航天大学自动化科学与电气工程学院北京100191 北京航空航天大学电子信息工程学院北京100191

面对应急救援任务时间紧、需求量大、待救援点数量规模较大等特点,提出了基于动态分治的大规模多场站无人机应急救援优化方法。在充分考虑无人机平台约束和应急救援任务约束的基础上,以最小化累计救援时间为目标函数,建立了多场站无人... 详细信息

面对应急救援任务时间紧、需求量大、待救援点数量规模较大等特点,提出了基于动态分治的大规模多场站无人机应急救援优化方法。在充分考虑无人机平台约束和应急救援任务约束的基础上,以最小化累计救援时间为目标函数,建立了多场站无人机应急救援模型。基于该模型,提出了基于路径相似度的动态分治策略,根据救援点的耦合关系进行空间聚类,将大规模问题分解为若干个规模较小、且耦合度较低的子问题;提出了自适应扰动邻域的变邻域搜索算法,通过多维邻域的协同搜索和动态交互,实现大规模应急投送方案的高效寻优。以典型样本为例,与先进元启发算法在不同规模的数据集上进行了对比,结果验证了所提方法能够有效地缩短应急投送的时间,为高效的灾后应急救援任务提供技术支撑。

关键词：无人机任务规划车辆路径问题混合整数规划邻域搜索算法

Toward Earth system modeling with resolved clouds and ocean submesoscales on heterogeneous many-core HPCs

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National Science Review 2023年第6期10卷 153-167页

作者： Shaoqing Zhang Shiming Xu Haohuan Fu Lixin Wu zhao Liu Yang Gao Chun zhao Wubing Wan Lingfeng Wan Haitian Lu Chenling Li Yanfei Liu Xiaojing Lv Jiayu Xie Yangyang Yu Jun Gu Xuantong Wang Yan Zhang Chenhui Ning Yunlong Fei Xiuwen Guo zhaoying Wang Xue Wang Zhenming Wang Binglin Qu Mingkui Li haoran zhao Yingjing Jiang Guang Yang Lv Lu Hong Wang Hong An Xin Zhang Yu Zhang Wentao Ma Fujiang Yu Jing Xu Xiaopei Lin Xueshun Shen State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography Ministry of Natural Resources Chinese Academy of Meteorological Sciences The Center of Earth System Modeling and Prediction China Meteorological Administration Key Laboratory of Physical Oceanography Ministry of Education/Institute for Advanced Ocean Study/Frontiers Science Center for Deep Ocean Multispheres and Earth System (DOMES) College of Oceanic and Atmospheric Sciences Ocean University of China Laoshan Laboratory Ministry of Education Key Lab for Earth System Modeling and Department of Earth System Science Tsinghua University National Supercomputing Center in Wuxi Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Environment and Ecology Ministry of Education Ocean University of China Deep Space Exploration Laboratory/School of Earth and Space Sciences University of Science and Technology of China School of Computer Science and Technology University of Science and Technology of China CEAKJ ADPRHexa Inc. National Marine Environmental Forecasting Center

With the aid of the newly developed ’Sunway’ heterogeneous-architecture supercomputer,which has world-leading HPC(high-performance computer) capability,a series of high-resolution coupled Earth system models(SW-HRESMs) with up to 5 km of atmosphere and 3 km of ocean have been developed.These models can meet the needs of multiscale interaction studies with different computational costs.Here we describe the progress of SW-HRESMs development,with an overview of the major advancements made by the international Earth science community in HR-ESMs.We also show the preliminary results of SW-HRESMs with regard to capturing major weather-climate extremes in the atmosphere and ocean,stressing the importance of permitted clouds and ocean submesoscale eddies in modeling tropical cyclones and eddy-mean flow interactions,and paving the way for further model development to resolve finer scales with even higher resolution and more realistic physics.Finally,in addition to increasing model resolution,the development procedure for a non-hydrostatic cloud and ocean submesoscale resolved ESM is discusse d,laying out the major scientific directions of such a huge modeling advancement.

关键词： high-resolution Earth system models heterogeneous supercomputer cloud and submesoscale resolving weather-climate extremes finer cross-scale interactions

基于BIM+GIS的水库农田防护工程施工进度实时监测方法

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水利技术监督 2024年第4期 22-25页

作者：赵浩然水发检测科技有限公司山东济南250000

当前防护工程施工进度实时监测结构多设置为目标式,监测的覆盖范围较小,导致同周期监测匹配频次降低,提出基于BIM+GIS的水库农田防护工程施工进度实时监测方法。设计多目标自适应识别监测结构,构建BIM+GIS防护工程进度实时监测模型;采... 详细信息

当前防护工程施工进度实时监测结构多设置为目标式,监测的覆盖范围较小,导致同周期监测匹配频次降低,提出基于BIM+GIS的水库农田防护工程施工进度实时监测方法。设计多目标自适应识别监测结构,构建BIM+GIS防护工程进度实时监测模型;采用点云技术辅助处理完成实时监测。测试结论表明:在BIM+GIS技术的辅助下,此次所设计的BIM+GIS工程施工进度实时监测方法对于工程进度的监测匹配频次相对更多,说明实时监测灵敏度、稳定性较强,具有实际的应用价值。

关键词： BIM技术水库农田防护 GIS辅助处理工程施工进度进度把控实时监测

The effect of mechanical loads on the degradation of aliphatic biodegradable polyesters

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Regenerative Biomaterials 2017年第3期4卷 179-190页

作者： Ying Li zhaowei Chu Xiaoming Li Xili Ding Meng Guo haoran zhao Jie Yao Lizhen Wang Qiang Cai Yubo Fan School of Biological Science and Medical Engineering Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationInternational Research Center for Implantable and Interventional Medical DevicesBeihang UniversityBeijing 100191People’s Republic of China Department of Biomedical Engineer University of CincinnatiCincinnatiOH 45221USA Key Laboratory of Advanced Materials of Ministry of Education of China Tsinghua UniversityBeijing 100084People’s Republic of China National Research Center for Rehabilitation Technical Aids Beijing 100176People’s Republic of China

Aliphatic biodegradable polyesters have been the most widely used synthetic polymers for developing biodegradable devices as alternatives for the currently used permanent medical devices.The performances during biodegradation process play crucial roles for final realization of their functions.Because physiological and biochemical environment in vivo significantly affects biodegradation process,large numbers of studies on effects of mechanical loads on the degradation of aliphatic biodegradable polyesters have been launched during last decades.In this review article,we discussed the mechanism of biodegradation and several different mechanical loads that have been reported to affect the biodegradation process.Other physiological and biochemical factors related to mechanical loads were also discussed.The mechanical load could change the conformational strain energy and morphology to weaken the stability of the polymer.Besides,the load and pattern could accelerate the loss of intrinsic mechanical properties of polymers.This indicated that investigations into effects of mechanical loads on the degradation should be indispensable.More combination condition of mechanical loads and multiple factors should be considered in order to keep the degradation rate controllable and evaluate the degradation process in vivo accurately.Only then can the degradable devise achieve the desired effects and further expand the special applications of aliphatic biodegradable polyesters.

关键词： aliphatic biodegradable polyesters mechanical load degradation

考虑原动机调速特性的中压直流发电机组动态仿真模型

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电工技术学报 2024年第10期39卷 2974-2983页

作者：易新强王东刘海涛赵浩然袁志方电磁能技术全国重点实验室(海军工程大学) 武汉430033

鉴于原动机调速特性对舰船中压直流(MVDC)发电机组运行影响的重要性,该文基于十二相同步发电机及其三相交流励磁机数学模型提出MVDC发电机组动态建模方法,以解决多相整流发电机及其励磁系统难以考虑原动机动态调速特性的难题。以某型燃... 详细信息

鉴于原动机调速特性对舰船中压直流(MVDC)发电机组运行影响的重要性,该文基于十二相同步发电机及其三相交流励磁机数学模型提出MVDC发电机组动态建模方法,以解决多相整流发电机及其励磁系统难以考虑原动机动态调速特性的难题。以某型燃气轮机整流发电机组动态仿真模型为基础,建立了频率不同的十二相同步发电机与三相交流励磁机组合模型,阐述原动机调速与发电机励磁调压相互耦合的计算流程。实测与仿真结果表明,该型燃气轮机发电机组在突加20%负载工况时转速跌落较大,且转速恢复过程需约20 s,但MVDC发电机组通过调节励磁系统可在1 s内使直流母线电压恢复稳定,从而为负载提供稳定直流功率输出。在校准仿真模型的基础上,通过系统分析突加不同比例负载时的转速、燃油流量、励磁电流、输出电压等性能参数变化规律,获取了燃发机组允许突加负载上限约为30%的运行边界认知,为MVDC发电机组励磁系统设计以及如何预留充足的短时强励能力提供了理论支撑。

关键词：原动机调速特性 MVDC发电机组十二相整流发电机动态仿真模型

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许芝银应用温阳法辨治瘿病后期经验

世界中医药 2024年第8期19卷 1153-1158页

作者：赵浩然许芝银马朝群南京中医药大学第一临床医学院南京210010 南京中医药大学附属医院普外科南京210010

全国名老中医药专家许芝银教授对于瘿病诊疗经验丰富,认为甲状腺功能减退、亚急性甲状腺炎、桥本甲状腺炎、甲状腺肿瘤术后等瘿病在临床进展到后期均出现甲状腺激素分泌不足或缺乏,常进一步累及肝、脾、肾等脏腑,均有阳虚证候。强调在... 详细信息

全国名老中医药专家许芝银教授对于瘿病诊疗经验丰富,认为甲状腺功能减退、亚急性甲状腺炎、桥本甲状腺炎、甲状腺肿瘤术后等瘿病在临床进展到后期均出现甲状腺激素分泌不足或缺乏,常进一步累及肝、脾、肾等脏腑,均有阳虚证候。强调在辨治基础上审证求机,灵活应用温阳法,温阳以行气、消痰、祛瘀、利水、散结、益气养阴。突出脏腑辨证、兼顾整体与局部统一,且灵活应用药对,颇具特色,疗效显著,更好地诠释“异病同治”思想。

关键词：瘿病后期温阳法辨证论治名老中医 @许芝银经验异病同治验案