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Experimental Study on Aerodynamic Characteristics of the Model Wind Rotor System and on Characterization of A Wind Generation System

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China Ocean Engineering 2019年第2期33卷 137-147页

作者： MENG Long he yan-ping ZHAO Yong-sheng PENG Tao yanG Jie State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) School of Naval Architecture Ocean&Civil EngineeringShanghai Jiao Tong University

In order to investigate the aerodynamic characteristics of 6-MW wind turbine, experimental study on the aerodynamic characteristics of the model rotor system and on characterization of a wind generation system is carried out. In the test, a thrust-matched rotor system and a geometry-matched rotor system, which utilize redesigned thrustmatched and original geometry-matched blades, respectively, are applied. The 6-MW wind turbine system is introduced briefly. The proper scaling laws for model tests are established in the paper, which are then implemented in the construction of a model wind turbine with optimally designed blades. And the parameters of the model are provided. The aerodynamic characteristics of the proposed 6-MW wind rotor system are explored by testing a 1:65.3 scale model at the State Key Laboratory of Ocean Engineering at Shanghai Jiao Tong University. Before carrying out the wind rotor system test, the turbulence intensity and spatial uniformity of the wind generation system are tested and results demonstrate that the characterization of the wind generation system is satisfied and the average turbulence intensity of less than 10% within the wind rotor plane is proved in the test. And then, the aerodynamic characteristics of 6-MW wind rotor system are investigated. The response characteristic differences between the thrust-matched rotor system and the geometry-matched rotor system are presented. Results indicate that the aerodynamic characteristics of 6-MW wind rotor with the thrust-matched rotor system are satisfied. The conclusion is that the thrust-matched rotor system can better reflect the characteristics of the prototype wind turbine. A set of model test method is proposed in the work and preparations for further model basin test of the 6-MW SPAR-type floating offshore wind turbine system are made.

关键词： thrust-matched rotor system geometry-matched rotor system wind generation system experimental study aerodynamic characteristics

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Concept Design and Coupled Dynamic Response Analysis on 6-MW Spar-Type Floating Offshore Wind Turbine

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China Ocean Engineering 2017年第5期31卷 567-577页

作者： MENG Long ZHOU Tao he yan-ping ZHAO Yong-sheng LIU Ya-dong State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) School of Naval Architecture Ocean & Civil EngineeringShanghai Jiao Tong University

Tower, Spar platform and mooring system are designed in the project based on a given 6-MW wind turbine. Under wind-induced only, wave-induced only and combined wind and wave induced loads, dynamic response is analyzed for a 6-MW Spar-type floating offshore wind turbine （FOWT） under operating conditions and parked conditions respectively. Comparison with a platform-fixed system （land-based system） ofa 6-MW wind turbine is carried out as well. Results demonstrate that the maximal out-of-plane deflection of the blade of a Spar-type system is 3.1% larger than that of a land-based system; the maximum response value of the nacelle acceleration is 215% larger for all the designed load cases being considered; the ultimate tower base fore-aft bending moment of the Spar-type system is 92% larger than that of the land-based system in all of the Design Load Cases （DLCs） being considered; the fluctuations of the mooring tension is mainly wave-induced, and the safety factor of the mooring tension is adequate for the 6-MW FOWT. The results can provide relevant modifications to the initial design for the Spar-type system, the detailed design and model basin test of the 6-MW Spar-type system.

关键词： Spar-type floating offshore wind turbine concept design combined wind and wave loads coupled dynamicresponse

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Experimental Study on New Multi-Column Tension-Leg-Type Floating Wind Turbine

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China Ocean Engineering 2018年第2期32卷 123-131页

作者： ZHAO Yong-sheng She Xiao-he he yan-ping yanG Jian-min PENG Tao KOU Yu-feng State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200030China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai Jiao Tong UniversityShanghai 200030China Shanghai University of Engineering Science School of ManagementShanghai 201620China

Deep-water regions often have winds favorable for offshore wind turbines, and floating turbines currently show the greatest potential to exploit such winds. This work established proper scaling laws for model tests, which were then implemented in the construction of a model wind turbine with optimally designed blades. The aerodynamic,hydrodynamic, and elastic characteristics of the proposed new multi-column tension-leg-type floating wind turbine(Wind Star TLP system) were explored in the wave tank testing of a 1:50 scale model at the State Key Laboratory of Ocean Engineering at Shanghai Jiao Tong University. Tests were conducted under conditions of still water, white noise waves, irregular waves, and combined wind, wave, and current loads. The results established the natural periods of the motion, damping, motion response amplitude operators, and tendon tensions of the Wind Star TLP system under different environmental conditions, and thus could serve as a reference for further research.

关键词： floating wind turbine model test WindS tar TLP dynamic response

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Fluid−Structure Interaction of Two-Phase Flow Passing Through 90° Pipe Bend Under Slug Pattern Conditions

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China Ocean Engineering 2021年第6期35卷 914-923页

作者： WANG Zhi-wei he yan-ping LI Ming-zhi QIU Ming HUANG Chao LIU Ya-dong WANG Zi State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Naval Architecture Ocean&Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Institute of Marine Equipment Shanghai Jiao Tong UniversityShanghai 200240China COSCO SHIPping(Qidong)Offshore Co.Ltd QidongChina

Numerical simulations of evolution characteristics of slug flow across a 90°pipe bend have been carried out to study the fluid−structure interaction response induced by internal slug *** two-phase flow patterns and turbulence were modelled by using the volume of fluid(VOF)model and the Realizable k−εturbulence model ***,validation of the CFD model was carried out and the desirable results were *** different flow patterns and the time-average mean void fraction was coincident with the reported experimental *** of different cases of slug flow have been carried out to show the effects of superficial gas and liquid velocity on the evolution characteristics of slug ***,a one-way coupled fluid-structure interaction framework was established to investigate the slug flow interaction with a 90°pipe bend under various superficial liquid and gas *** was found that the maximum total deformation and equivalent stress increased with the increasing superficial gas velocity,while decreased with the increasing superficial liquid *** addition,the total deformation and equivalent stress has obvious periodic ***,the distribution position of maximum deformation and stress was related to the evolution of slug *** the increasing superficial gas velocity,the maximum total deformation was mainly located at the 90°pipe *** as the superficial liquid velocity increases,the maximum total deformation was mainly located in the horizontal pipe ***,the slug flow with higher superficial gas velocity will induce more serious cyclical impact on the 90°pipe bend.

关键词： two-phase flow 90°pipe bend slug flow fluid−structure interaction dynamic response characteristics

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Dynamic Response of 6MW Spar Type Floating Offshore Wind Turbine by Experiment and Numerical Analyses

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China Ocean Engineering 2020年第5期34卷 608-620页

作者： MENG Long he yan-ping ZHAO Yong-sheng yanG Jie yanGhe HAN Zhao-long YU Long MAO Wen-gang DU Wei-kang a State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China b Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai Jiao Tong UniversityShanghai 200240China c School of Naval Architecture Ocean&Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China d China Aerodynamics Research and Development Center Mianyang621000China e Ocean Engineering Department Texas A&M UniversityCollege StationTX 77843USA f Department of mechanics and Maritime Sciences Chalmers University of Technology41296GothenburgSweden g Ocean Engineering Group Department of CivilArchitecture and Environmental EngineeringUniversity of Texas at AustinTexasTX 78712USA

The floating offshore wind turbine(FOWT) is widely used for harvesting marine wind energy. Its dynamic responses under offshore wind and wave environment provide essential reference for the design and installation. In this study,the dynamic responses of a 6 MW Spar type FOWT designed for the water depth of 100 m are investigated by means of the wave tank experiment and numerical analysis. A scaled model is manufactured for the experiment at a ratio of65.3, while the numerical model is constructed on the open-source platform FAST(Fatigue, Aerodynamics,Structures, and Turbulence). Still water tests, wind-induced only tests, wave-induced only tests and combined windwave-current tests are all conducted experimentally and numerically. The accuracy of the experimental set-up as well as the loading generation has been verified. Surge, pitch and heave motions are selected to analyze and the numerical results agree well with the experimental values. Even though results obtained by using the FOWT calculation model established in FAST software show some deviations from the test results, the trends are always consistent. Both experimental and numerical studies demonstrate that they are reliable for the designed 6 MW Spar type FOWT.

关键词： floating offshore wind turbine dynamic responses Spar type platform FAST model test

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Human Cytomegalovirus UL138 Open Reading Frame Is Highly Conserved in Clinical Strains

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Chinese Medical Sciences Journal 2009年第2期24卷 107-111页

作者： Ying Qi Rong he yan-ping Ma Zheng-rong Sun Yao-hua Ji Qiang Ruan Virus Laboratory Shengjing Hospital China Medical University Shenyang 110004 China

Objective To investigate the variability of human cytomegalovirus （HCMV） UL138 open reading frame （ORF） in clinical strains. Methods HCMV UL138 ORF was amplified by polymerase chain reaction （PCR） and PCR amplification products were sequenced directly, and the data were analyzed in 19 clinical strains. Results LIL138 ORF in all 30 clinical strains was amplified successfully. Compared with that of Toledo strain, the nucleotide and amino acid sequence identifies of LIL138 ORF in all strains were 97.41% to 99.41% and 98.24% to 99.42%, respectively. All of the nucleofide mutations were substitutions. The spatial structure and post-translational modification sites of HL138 encoded proteins were conserved. The result of phylogenetic tree showed that HCMV HL138 sequence variations were not definitely related with different clinical symptoms. Conclusion HCMV UL138 ORF in clinical strains is high conservation, which might be helpful for UL138 encoded protein to play a role in latent infection of HCMV.

关键词： human cytomegalovirus UL 138 conservation

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HIGH VARIABILITY OF HUMAN CYTOMEGALOVIRUS UL150 OPEN READING FRAME IN LOW-PASSAGED CLINICAL ISOLATES

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Chinese Medical Sciences Journal 2006年第2期21卷 69-74页

作者： Yao-hua Ji Zheng-rong Sun Qiang Ruan Rong he Ying Qi yan-ping Ma Yu-jing Huang Virus Laboratory .the Second Affiliated Hospital China Medical University Shenyang 110004

Objective To investigate the polymorphism of human cytomegalovirus (HCMV) UL150 open reading frame (ORF) in low-passaged clinical isolates, and to study the relationship between the polymorphism and different pathogenesis of congenital HCMV infection. Methods PCR was performed to amplify the entire HCMV UL150 ORF region of 29 clinical isolates, which had been proven containing detectable HCMV-DNA using fluorescence quantitative PCR. PCR amplification products were sequenced directly, and the data were analyzed. Results Totally 25 among 29 isolates were amplified, and 18 isolates were sequenced successfully. HCMV UL150 ORF sequences derived from congenitally infected infants were high variability. The UL150 ORF in all 18 clinical isolates shifted backward by 8 nucleotides leading to frame-shift, and contained a single nucleotide deletion at nucleotide position 226 compared with that of Toledo strain. The nucleotide diversity was 0.1% to 6.8% and the amino acid diversity was 0.2% to 19.2% related to Toledo strain. However, the nucleotide diversity was 0.1% to 6.4% and amino acid diversity was 0.2% to 8.3% by compared with Merlin strain. Compared with Toledo, 4 new cysteine residues and 13 additional posttranslational modification sites were observed in UL150 putative proteins of clinical isolates. Moreover, the UL150 putative protein contained an additional transmembrane helix at position of 4-17 amino acid related to Toledo. Conclusion HCMV UL150 ORF and deduced amino acid sequences of clinical strains are hypervariability. No obvious linkage between the polymorphism and different pathogenesis of congenital HCMV infection is found.

关键词： human cytomegalovirus gene UL150

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Defects in NTD InP Probed by Positron Annihilation Spectroscopy

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Wuhan University Journal of Natural Sciences 1999年第3期4卷 290-294页

作者： Wen Xiang-e Li Shi-qing Ma Li yan he-ping Wang Zhu Wang Shao-jie Guo Cheng-zhan Zhao Hai-ge Department of Physics Wuhan University Wuhan China Department of Physics Shenzheng University Shenzheng China

Two samples of high purity InP extracted from the same wafer were examined by positron annihilation spectrum analysis after having been, processed by means of thermal Neutron Transmutation Doping (NTD). Compared with the as grown sample with an average positron lifetime of 246 ps at 300 K, the high dose doped one has an average lifetime of 251 ps and the lower dose doped one 248 ps measured under the same condition, indicating that some defects have been introduced in the NTD process. Annealing experimental results show a steady decrease in the average lifetime with increasing annealing temperature up to 550°C. And a peak in lifetime curve around 500°C was observed which may be attributed to defects related structure conversion. Temperature experiments conducted on the low dose doped sample from 150K to 290 K suggest the existence of vacancy-impurity complex which have given rise to an abnormal reduction of average lifetime with increasing temperature. Also a n-type InP sample (A61) was irradiated with thermal neutrons in another reactor and the lifetime results display an increase of 15 ps. Furthermore, to study epithermal neutron irradiation effects on InP, measurements were performed on an n-type InP sample (N119) along with one p-type sample (P118) after having been irradiated with high fluence of epithermal neutrons. The former has an average lifetime of 262 ps and the latter 247 ps after irradiation. The results prove that on some occassion epithermal neutrons can produce sizable defects in InP.

关键词： NTD InP PAS defects epithermal neutron

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Prevalence of Tuberculosis among Close Contacts of Index Cases in 27 Universities in Beijing,China,2017-2018

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Biomedical and Environmental Sciences 2020年第10期33卷 780-784页

作者： ZHAO Fei ZHANG Zhi Guo MA Shu Bo yanG Zhen he yan ping WANG Lu Qin OWITI Philip MA Chao LI Tao DU Xin ZHANG Can You CheNG Jun WANG Li Xia he Guang Xue ZHANG Hui LI Ke Xin Clinical Trial Center Beijing HospitalNational Center of Gerontology/Institute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China National Center for TB Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China Department of Epidemiology of Microbial Diseases Yale School of Public HealthYale universityNew HavenCTUSA Beijing Changping Institute for Tuberculosis Prevention and Treatment Beijing 102200China The International Union Against Tuberculosis and Lung Disease ParisFrance The National Tuberculosis Leprosy and Lung Disease ProgramNairobiKenya National Immunization Program Chinese Center for Disease Control and PreventionBeijing 102206China Department of Science and Technology Chinese Center for Disease Control and PreventionBeijing 102206China

The World health Organization(WHO)launched the‘End TB Strategy’,which aims to reduce the mortality and incidence rate of tuberculosis(TB)by 95% and 90% by 2035,respectively,compared with the levels in *** achieve these targets and milestones,the strategy set three pillars and 10 indicators,one of which is systematic screening of contacts and high-risk groups[1].

关键词： mortality tuberculosis Cases

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遗传算法中群体多样性评价指标的研究

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哈尔滨工业大学学报 2009年第3期41卷 67-70页

作者：何燕平何辉张筱磊哈尔滨工业大学(威海)计算机科学与技术学院山东威海264209 哈尔滨工业大学航天学院 150008

本文针对遗传算法中早熟问题进行了分析,提出了评价群体多样性的两个性能指标,在此基础上结合模糊逻辑调节遗传算法的交叉和变异概率.对一组函数优化问题对标准算法和优化算法进行测试,测试结果表明基于模糊逻辑控制的遗传算法的性能要... 详细信息

本文针对遗传算法中早熟问题进行了分析,提出了评价群体多样性的两个性能指标,在此基础上结合模糊逻辑调节遗传算法的交叉和变异概率.对一组函数优化问题对标准算法和优化算法进行测试,测试结果表明基于模糊逻辑控制的遗传算法的性能要优于标准遗传算法.证明本文提出的群体多样性的评价指标是有效的.

关键词：群体多样性评价指标遗传算法

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