引水发电系统参数设计的图形化输入方法研究

按照软件工程的一般原则。结合水电站引水发电系统参数设计，详细介绍了一种通过图形输入大量参数的方法。以及在Visual Basic6.0平台下该方法的程序实现。此方法着重于系统对象及其参数的分析。图形对象的简化，参数的归类和数据模型的抽象。     

Heat transfer control in an enclosure by using a rotating plate and stratified fluids

The effects of an inner rotating plate with horizontal axis on the heat transfer between two vertical walls in a rectangular enclosure with stratified fluid layers were investigated experimentally. The aspect ratio of the enclosure height/width was 1 throughout the experiments. An acrylic plate with small thermal conductivity was installed horizontally at the center of the square enclosure, and was rotated at various speeds for normal and reverse rotations by using the motor installed outside of the enclosure. Purified water and silicon oil were used as the working fluids and were stratified in the enclosure. It is shown here that the heat transfer rate of the enclosure with stratified fluid layers differs largely from that of the enclosure with a single fluid layer. Namely, the heat transfer coefficient increases rapidly at a low rotating speed range, and maintains an almost constant value at a high rotating speed range. © 2003 Wiley Periodicals, Inc. Heat Trans Asian Res, 32(6): 489–500, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/htj.10081     

Heat transfer regulation in a rectangular enclosure using a rotating plate

The effects of an inner rotating plate with horizontal axis on the heat transfer in a differentially heated vertical enclosure were investigated experimentally. The aspect ratio of the enclosure height/width was 1 throughout the experiments. An acrylic plate with a small thermal conductivity was installed horizontally at the center of the square enclosure, and was rotated at various speeds for normal and reverse rotations by using the motor attached outside of the enclosure. Purified water was used as the working fluid. The flow pattern was sketched by a visualization experiment using aluminum powder. The heat transfer results were also compared with those from a previous paper on a rotating cylinder. It is clarified here that the heat transfer rate of the enclosure depends largely on the parameter Gr_w/Re_ω², and is characterized by three regions. The heat transfer rate of the enclosure with a rotating plate is somewhat larger than that of a rotating cylinder in the forced convection region. The rotating plate used here will be useful for regulation of wide‐ranging heat transfer. © 2003 Wiley Periodicals, Inc. Heat Trans Asian Res, 32(4): 342–353, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/htj.10099     

过水围堰导流系统瞬时风险分析

结合过水围堰导流系统的实际研究了导流期间系统任一瞬时的风险分析，定义了系统的模糊失效状态，并建立了相应的瞬时风险分析模型，为定量分析系统修复能力及风险控制等提供理论依据。     

尾水主洞长度对抽水蓄能电站尾水管进口最小压力的影响

针对采用"一洞两机"布置形式的无尾水调压室抽水蓄能电站,基于瞬变流理论与特征线法,对实际工程进行数值模拟,分析了不同尾水主洞长度对相继甩负荷工况下尾水管进口最小压力影响的内在机理。结果表明,尾水主洞的增长对尾水管进口最小压力不利,但随着尾水主洞长度的增长,尾水管进口最小压力先减小后增大再减小;随着尾水主洞长度的增长,先甩负荷机组和后甩负荷机组均有可能是引水发电系统出现尾水管进口最小压力的不利机组,整体来看,先甩负荷机组尾水管进口最小压力先减小后增大,后甩负荷机组尾水管进口最小压力先增大后减小。     

淮河中游行洪区开启运用的初步研究

在对淮河中游行洪区不同启用时机和方式的物理过程进行比较分析的基础上，利用概化河段单一行洪区数学模型，计算分析得出行洪区在不同类型的洪水情况下，选用不同的开启时机和开启方式在行洪效果上所产生的差异。     

电站引水损失对厂内优化运行设计的影响分析

为了使小型水电站厂内优化运行计算的结果更趋准确，合理，对具有复杂引水系统的小型水电站引水损失情况进行了分析，通过实例说明，选择不同的开机组合，机组段引水系统水头损失有可能存在较大的差异。在求解厂内优化运行问题时，不宜简化或忽略；并相应给出了适用于这类情况的小型水电站求解厂内优化运行问题的一般方法。     

浅述某工程超深地连墙施工技术难点及对策

结合某工程地质条件,针对其地连墙施工难点进行了分析,在此基础上提出了相应的解决措施并分别作了具体阐述,包括导墙施工要点,混凝土防绕流措施,地连墙接缝防渗措施等,以期指导今后同类工程施工。     

监测技术在深基坑施工中的应用

结合具体工程实例,论述了如何利用深基坑监测技术及时反映基坑变形情况,研判基坑及周边设施的状态,并根据监测数据,进一步指导施工,以采取有效措施确保基坑及其周边设施的安全。     

秋冬季围护结构绿化对建筑保温性能的影响

制作两个相同的模拟实体建筑的混凝土模型,采用控制变量的方法,在一个模型的围护结构上布置100％覆盖率的屋顶绿化和50％覆盖率的墙体绿化作为实验模型,另一个不布置绿化作为对照模型,采集两个模型内外部的温度数据.计算分析表明,2010年10月～2011年3月间,实验模型的平均积温要比对照模型的高1.31,绿色植被能够有效降...