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不同叶形曼陀罗叶结构比较及鉴别方法研究 被引量:2
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作者 刘文啟 陆以云 +3 位作者 康帅 严华 魏锋 马双成 《药物分析杂志》 CAS CSCD 北大核心 2015年第6期1092-1098,共7页
目的:建立曼陀罗叶结构分析及性状显微鉴别方法,为进一步完善质量标准提供基础。方法:依据叶结构分析方法对曼陀罗叶特征规范描述量化对比,同时使用植物形态学和性状显微鉴别的方法对其形态比对分析研究。结果:曼陀罗叶叶片形态特征多变... 目的:建立曼陀罗叶结构分析及性状显微鉴别方法,为进一步完善质量标准提供基础。方法:依据叶结构分析方法对曼陀罗叶特征规范描述量化对比,同时使用植物形态学和性状显微鉴别的方法对其形态比对分析研究。结果:曼陀罗叶叶片形态特征多变;主要表现在叶形、叶主脉两侧同编号裂片形态及叶基部形态;显微特征主要表现在叶草酸钙结晶晶型,叶主脉维管束的形态,导管排列和孔径的差异。结论:研究结果为规范药材质量标准用语、曼陀罗叶鉴别及质量标准修订提高提供参考。 展开更多
关键词 曼陀罗 叶结构分析 量化对比 性状鉴别 显微鉴别 植物形态 规范术语
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Flow Structure and Heat Exchange Analysis in Internal Cooling Channel of Gas Turbine Blade 被引量:3
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作者 Ryszard Szwaba Piotr Kaczynski +1 位作者 Piotr Doerffer Janusz Telega 《Journal of Thermal Science》 SCIE EI CAS CSCD 2016年第4期336-341,共6页
This paper presents the study of the flow structure and heat transfer,and also their correlations on the four walls of a radial cooling passage model of a gas turbine blade.The investigations focus on heat transfer an... This paper presents the study of the flow structure and heat transfer,and also their correlations on the four walls of a radial cooling passage model of a gas turbine blade.The investigations focus on heat transfer and aerodynamic measurements in the channel,which is an accurate representation of the configuration used in aeroengines.Correlations for the heat transfer coefficient and the pressure drop used in the design of radial cooling passages are often developed from simplified models.It is important to note that real engine passages do not have perfect rectangular cross sections,but include coiner fillet,ribs with fillet radii and special orientation.Therefore,this work provides detailed fluid flow and heat transfer data for a model of radial cooling geometry which possesses very realistic features. 展开更多
关键词 cooling internal blade channels heat exchange transient liquid crystal method
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Numerical analysis and experimental investigation of wind turbine blades with innovative features:Structural response and characteristics 被引量:10
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作者 CHEN Xiao QIN ZhiWen +2 位作者 YANG Ke ZHAO XiaoLu XU JianZhong 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2015年第1期1-8,共8页
Innovative features of wind turbine blades with flatback at inboard region,thick airfoils at inboard as well as mid-span region and transversely stepped thickness in spar caps have been proposed by Institute of Engine... Innovative features of wind turbine blades with flatback at inboard region,thick airfoils at inboard as well as mid-span region and transversely stepped thickness in spar caps have been proposed by Institute of Engineering Thermophysics,Chinese Academy of Sciences(IET-Wind)in order to improve both aerodynamic and structural efficiency of rotor blades.To verify the proposed design concepts,this study first presented numerical analysis using finite element method to clarify the effect of flatback on local buckling strength of the inboard region.Blade models with various loading cases,inboard configurations,and core materials were comparatively studied.Furthermore,a prototype blade incorporated with innovative features was manufactured and tested under static bending loads to investigate its structural response and characteristics.It was found that rotor blades with flatback exhibited favorable local buckling strength at the inboard region compared with those with conventional sharp trailing edge when low-density PVC foam was used.The prototype blade showed linear behavior under extreme loads in spar caps,aft panels,shear web and flatback near the maximum chord which is usually susceptible to buckling in the blades according to traditional designs.The inboard region of the blade showed exceptional load-carrying capacity as it survived420%extreme loads in the experiment.Through this study,potential structural advantages by applying proposed structural features to large composite blades of multi-megawatt wind turbines were addressed. 展开更多
关键词 wind energy rotor blade flatback local buckling extreme loads
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