齐鲁乙烯裂解炉装置超负荷运行的有效措施

实施裂解炉改造,优化裂解原料,稳定裂解炉运行,不断优化裂解炉运行工况,是提高乙烯装置产能的关键。     

西藏某隧道施工超前地质预报ISP系统的应用研究

由于TBM隧道空间限制、电磁环境复杂等原因,TBM隧道超前地质预报,特别是双护盾TBM隧道超前地质预报工作一直是一个世界性的难题。本文在西藏某公路隧道引入了新型的与TBM一体化的机载ISP系统,尚属在国内首次运用。文中深入分析了ISP系统创新的RSSR原理,就机载ISP系统在双护盾TBM中的应用进行深入研究。ISP系统在双护盾TBM施工隧道超前地质预报工作中的成功应用,能够切实指导TBM掘进施工,降低TBM卡机风险,为隧道安全顺利贯通保驾护航。     

Analysis and Application of the Series Core Snubber

The transformer core snubber (CS), as one of the most important components in the EAST (experimental advanced superconducting tokamak) NBI (neutral beam injector) system, is designed to limit grid damage and protect the ion source during periods of electrical breakdowns. A transformer core snubber is analyzed in detail in this paper. Several kinds of soft magnetic cores are presented and compared. With analysis and experiment on the basic characteristics of the cores, the most suitable materials are suggested. The circuit simulation code is established which could simulate faulty conditions with concentrated and distributed CS concepts. Based on the above work, an ion source CS is developed with series type of distributed topology. The CS has been subjected to experimental validation at 80 kV with a peak short-current of approximately 400 A in a real NBI system, which proves the accuracy of the adopted assumptions and the analysis method.     

某型无人机机翼三维湍流流场数值模拟

无人机机翼的气动特性关系到无人机的飞行性能．常规设计采用经验设计并注重风洞试验。本文采用计算流体力学软件对某型无人机机翼的三维外部流场进行模拟,得到了机翼三维气动特性。对数值结果与实验结果进行了比较分析,说明所采用的模型和方法能够正确地模拟机翼外部的复杂流动特征,为机翼的设计和改进奠定了基础。     

中性束注入器用串联高压缓冲器优化设计

为了优化中性束注入器(NBI)用高压缓冲器的布局,分析了缓冲器结构设计参数和缓冲器性能的相互关系,并通过等效电路仿真模型修正了缓冲器放电峰值电流经验公式,得到了不同激励信号下串联高压缓冲器在高频脉冲放电情况下的特性,最后,在高压缓冲器理论分析和仿真分析的基础上,对设计的非晶缓冲器和Deltmax缓冲器串联高压测试件进行了短路放电测试,得到了短路放电瞬间串联缓冲器的分压和回路的放电电流。放电实验结果表明,黑色非晶缓冲器感应电压频率响应比较快,Deltmax缓冲器可以消耗更多的故障电流能量,非晶缓冲器和Deltmax缓冲器这2种不同直流缓冲器的串联能够有效地抑制高压直流故障短路电流并吸收故障电能。     

红外图像模糊识别筛选方法

研究了一种针对海量图像信息进行模糊识别筛选的方法.运用该方法可大大减少操作人员的工作量,提高处理效率.     

恩人是个兵哥哥

7月4日,家住永康市舟山一村的周法萍,带着两个儿子楼云、楼宇,提着两个自家种的大西瓜,来到消防大队战斗班,对一年多来无私资助他们一家的桐庐籍战士方伟峰表示感激之意。     

纳米流体对聚变堆材料流动腐蚀的实验研究

设计了旋转叶片式纳米流体腐蚀实验装置,以ITER堆内部件水冷设计方案为参考条件,开展了两种质量分数(0.01%和1%)氧化铝纳米流体对聚变堆结构材料RAFM钢、316L(N)钢及管道热沉材料CuCrZr合金等样品服役条件下的腐蚀实验。样品的SEM、EDS、XPS分析结果表明:两种质量分数的纳米流体对RAFM钢、316L(N)钢的腐蚀轻微,与纳米流体呈现良好的相容性;CuCrZr合金表面生成一层氧化膜,表面腐蚀形貌呈现出点坑及裂纹;腐蚀时间、纳米流体流速及纳米颗粒含量对腐蚀程度和表面形貌影响显著;CuCrZr合金表面发生了吸氧腐蚀与冲刷腐蚀,两者的耦合效应加速了腐蚀进程。     

Double-null divertor configuration discharge and disruptive heat flux simulation using TSC on EAST

The tokamak simulation code (TSC) is employed to simulate the complete evolution of a disruptive discharge in the experimental advanced superconducting tokamak.The multiplication factor of the anomalous transport coefficient was adjusted to model the major disruptive discharge with double-null divertor configuration based on shot 61 916.The real-time feed-back control system for the plasma displacement was employed.Modeling results of the evolution of the poloidal field coil currents,the plasma current,the major radius,the plasma configuration all show agreement with experimental measurements.Results from the simulation show that during disruption,heat flux about 8 MW m-2 flows to the upper divertor target plate and about 6 MW m-2 flows to the lower divertor target plate.Computations predict that different amounts of heat fluxes on the divertor target plate could result by adjusting the multiplication factor of the anomalous transport coefficient.This shows that TSC has high flexibility and predictability.     

HSP超前地质预报技术在双护盾TBM施工隧道中的应用

结合探测成果与实际开挖所揭露的围岩情况表明,HSP地质预报法对节理裂隙密集带、断层破碎带等地质异常情况响应较好,但在围岩较为破碎的洞段,震源能量衰减较大,因此为保证TBM掘进施工的安全,应增加相邻两次预报的搭接长度;基于掘进参数的模糊数学判别围岩结果与HSP探测结果基本吻合,该客观性评价表明了该方法具有较高的预报准确率,能够对TBM施工期间前方地质围岩情况做出可靠的判断。