An analytical expression for the power coefficient of an ideal horizontal-axis wind turbine

The paper shows that an analytical evaluation of the power coefficient C_p for an ideal horizontal-axis wind turbine can be made via an expression giving the direct relationship of C_p and the axial induction factor a. The results obtained agree closely with those obtained numerically from the usual integral expression involving several variables.     

非定常流弯肘型尾水管不规则压力脉动预测

尾水管内螺旋状涡带引起的压力脉动是造成混流式水轮机机组振动的主要原因之一,直接威胁机组的安全运行。为此,提出一种基于CFD数值计算的水轮机尾水管压力脉动数字化预测法,并利用此法对一大型混流式水轮机偏工况下尾水管内水流流动进行了长时间非定常流计算,讨论该工况下尾水管内死水域与涡带的运动规律,预测了尾水管的不规则压力脉动,压力脉动分析结果表明,其波形、频率、相位与实际基本一致。     

Use of oxygen for the cleaning, passivation, and preservation of power-generating equipment at the Kharanorskaya SAPP

Studies conducted on two power-generating units at the Kharanorskaya SAPP relative to the steam-water-oxygen passivation, preservation, and partial cleaning of all boiler-heating surfaces, including the surfaces of the reheater, and passivation of the surfaces of the high-pressure heaters on the steam and water sides by the steam-oxygen method, as well as partial passivation, preservation, and cleaning of turbine blading are presented. __________ Translated from élektricheskie Stantsii, No. 6, pp. 56–64, May, 2006.     

Technical risk involved in long-term operation of steam turbines

The scope of the paper is the assessment of the technical risk involved in long-term operation of power units. Detailed analyses have been conducted for steam turbine components. The sources and consequences of risk have been identified and the probability of turbine components failure calculated. The quantitative assessment of the risk has been made and possibilities of its reduction discussed.     

运用现代CFD方法设计高效率的汽轮机

论述了运用现代计算流体动力学(ComputationalFluidDynamics,CFD)技术设计高效率汽轮机的方法,典型应用的实例有全三维叶片级流场、叶片汽封和排汽蜗壳计算。计算结果和实际是相符的。进一步对结构性单元和非结构单元程序的计算结果进行了比较,已证明,非结构单元CFD程序用于复杂形状的流场计算时,结果与实际相当一致,并具有独特的功能。     

外高桥900MW超临界汽轮机的合作制造概况

简述了上海汽轮机有限公司(STC)与西门子公司首次合作制造的目前国内最大容量的外高桥900MW超临界机组的一些基本情况，介绍了在合作制造中为保证生产进度和质量而采取的工艺改进、技术攻关等措施，以及通过合作制造提升了我公司的制造能力和管理水平。     

电液控制器在汽轮机控制系统中的应用

介绍了WOODWARD505电液控制器原理、功能及在包钢热电厂汽轮鼓风机控制系统的成功应用，大大改善了汽轮机的调节控制品质。     

基于LVQ网络在轴承座松动故障诊断中的应用

把汽轮机轴承座松动的相关频段上不同频率谱的谱峰能量值作为故障信号的训练样本输入到LVQ网络中去，并由LVQ网络产生训练后不同的权重向量。由于竞争层神经元的权重分布不同，则权重分布图也不同，可根据不同的权重分布图来确认和诊断汽轮机轴承座松动故障的不同程度。     

K418B合金细晶铸造整体涡轮真空热处理工艺研究

通过力学性能评估和金相组织观察，研究五种热处理制度，两个周期的试验结果，确定了Ｋ４１８Ｂ合金细晶铸造整体涡轮的真空热处理工艺。     

葛洲坝电站2号水轮机转轮室中环修复

针对葛洲坝电站2号机组运行中出现转轮室中环损坏的现象,设计制造出转轮室现场机加工的大型专用机床,在修复改造过程中,解决了一系列技术难题,改造后技术指标均达到理想水平,为电站机组现场修复技术积累了宝贵经验.