天荒坪电站上水库进出水口截水墙帷幕补强灌浆试验

天荒坪电站上水库采用全库盆沥青混凝土防渗,仅进出水口位置未设置.为防止库水下渗到沥青混凝土库盆的下卧层,设置了截水墙和防渗帷幕,该帷幕长期处于动水压力下,性能削弱较严重,需要补强.为了保证帷幕补强的耐久性,进行了试验,对灌浆的参数和材料进行比选,并用于最终补强施工.     

Flow simulation in Electro-Static-Precipitator (ESP) ducts with turning vanes

Flow simulation in inlet ducts along with several turning vanes used in electrostatic precipitator (ESP) are analysed to understand the flow pattern at its exit locations. The geometry of inlet duct has been extracted from the Plant Design Manufacturing System (PDMS) and refined with turning vanes placed at several locations. The domain of duct geometry around turning vanes are decomposed with several volumes and filled with hexahedral elements with the help of stat-of-art mesh generator - Hypermesh. The resulting computational grid has been used in TASCflow solver to predict its flow pattern in the duct. Simulation for the specified conditions predicts uneven flow distribution in the ESP inlet duct. Due to large flow recirculation and turbulent losses in the duct, non-uniform averaged mass flow rates are noticed at duct exit locations. Simulation results suggest that the improvement of flow distribution in the duct through optimization can be tried by placing more turning/splitter vanes in the inlet duct. In order to ensure that the results obtained from TASCflow are meaningful and in right direction, in the absence of measurement data, simulation was benchmarked with other industry standard commercial flow solvers. The observations made from these popular solvers confirm the findings obtained using the TASCflow solver. The analysis with multiple solvers indicates that Fluent provides quick results, while better visualization can be made using CFX solver. The Star-CD solver, which captures the turbulent losses accurately takes more time for convergence provides alternatives.     

洪家渡水电站进水口顺向坡加固处理设计

经过对洪家渡水电站进水口顺向坡稳定问题的系统分析研究，采用了以大型抗滑桩与锚索联合加固并辅以排水的处理方案，通过对抗滑桩、锚索及施工支洞的合理布置与设计，成功地解决了进水口顺向坡处理技术难度大、施工干扰大和工期紧的难题。目前，洪家渡水电站进水口顺向坡锚索及抗滑桩施工已顺利完成，并已经受了下闸蓄水和发电运行的初步考验，监测情况表明，稳定状况良好。     

3-D computational fluid dynamics for gas and gas-particle flows in a cyclone with different inlet section angles

A three-dimensional computational fluid dynamics (CFD) Reynolds stress model (RSM) was used to describe the gas and gas-solid flow in a cyclone with a scroll inlet duct at three different inlet section angles in relation to the cyclone body. The effects of the inlet section angles on the fluid dynamics inside the cyclone and on the performance parameters (collection efficiency and pressure drop) were analyzed by means of the finite volume method using a computational code and an industrial-sized cyclone for separation of gas-particle phases operated by Votorantim Cimentos Company. The numerical results show that the value for overall collection efficiency in this work increased to 77.2% for the 45° inlet section angle, while that for the normal inlet duct was 54.4% under the same operating conditions.     

标样气体进样系统

标样气体进样系统用于质谱计的标样气体校准 ,以获得准确的测量数据。介绍了标样气体进样系统的结构、工作原理及进样方法 ,给出了标样气体配置的不确定度分析和测试结果。     

An investigation of air inlet types in mixing ventilation

Previous studies have shown that dispersion of contaminant concentrations strongly depends on air inlet types. However, these studies were performed computationally, not experimentally. Thus, the purpose of the current research is to obtain contaminant concentrations in a room, to perform qualitative and quantitative comparison for a wall jet (WJ) air inlet and a ceiling diffuser (CD) air inlet, and to determine more efficient inlet and outlet configuration.     

高压锅炉供水除氧防腐蚀剂XC-1

所报道的除氧防腐蚀剂XC－1，可用于压力6．5MPa以上，不能使用亚硫酸钠的蒸汽锅炉除氧，它以亚硫酸铵为主剂，复配以挥发性胺，成膜性胺，乳化剂等助剂，可迅速除氧并调节供水和蒸汽的pH值，防止高温腐蚀，探讨了亚硫酸铵的除氧机理及两种胺的作用，在内考察了不同加量的XC－1对胜利现河3号锅炉注汽转化水的除氧率（煮沸10分钟），加量27mg/L时除氧率98％，加量30mg/L时除氧率100％，在现河3号锅炉上进行了连续96小时的现场试验，XC-1在热力除氧器换热器前加入，除氧温度104℃，每8h加药一次，加药量由25mg/L增加到30mg/L当加量为27mg/L时锅炉供水含氧量在0．1mg/L以下，考虑到除氧温度，压力可能波动，加量确定为28mg/L，这时供水含氧量0．003－0．004mg/L，过剩SO3^2-含量在1．6－3．6mg/L范围，锅炉进口供水pH值平均为8．4,出口湿蒸汽pH值平均为10．03，PH值达到了要求。     

基于流固耦合的煤矿井下刮泥机受力分析

为了实现矿井水井下处理,设计刮泥机与平流式沉淀池配合使用。为了分析刮泥机在沉淀池内正常工作时受力变形情况,通过调节入口流速以及施加不同水平载荷,利用ANSYS软件,基于流固耦合相关理论对刮泥机受力变形进行仿真。仿真结果表明:设计的刮泥机满足实际工作的强度要求;相比于入口流速,水平载荷变化对刮泥板、支架的应力和变形影响较大,水平载荷过大可能会引起压耙事故。针对此问题,提出了相应的解决方案,以保证刮泥机正常工作。     

剖面浮标“浮星”可变浮力系统性能研究

为了提高柱塞泵的容积效率,针对可变浮力系统（VBS）中内油箱处于真空环境下的特殊应用工况,基于柱塞泵进油口压力与液压油饱和蒸汽压的关系,建立柱塞泵进油口压力数学模型,分析弹簧刚度、吸油管路直径和压载舱真空度对柱塞泵容积效率的影响;结合AMESim软件,重点分析VBS排油和回油的流量特性;为了验证仿真模型和计算结果的准确性,搭建VBS性能测试平台. 结果表明：当柱塞泵进油口压力低于液压油饱和蒸汽压时,容易发生气穴现象,柱塞泵的容积效率会明显下降;通过调节弹簧刚度、吸油管路直径和压载舱真空度等参数的取值范围,使进油口压力满足设计要求,可以提高柱塞泵的容积效率,降低剖面浮标的运行能耗,从而提高剖面浮标的续航能力.     

硅粉生产装置平动筛进料口与出料口密封装置的改进

分析了硅粉生产装置平动筛进料口与出料口密封存在的问题,将柔性耐震带包裹连接密封改为石墨柔性填料密封,改造后的进、出料口密封性能更好,每年可节约物料损失费用、检修费用约115万元。