微波宽带超大功率合成技术

介绍了系统内微波宽带超大功率合成原理、合成效率分析、微波宽带行波管功率合成的设计方法以及功率合成的幅相不一致性对合成效率的影响,并提出了行波管选择和行波管电源设计的要点和新思路,给出了一种实用的大功率合成系统的原理框图,介绍了一种微波宽带功率合成系统的调试方法,给出了测试数据以及数据分析,为微波宽带功率合成技术应用开辟了一条有意义的途径。     

真空微电子微波管

本文在扼要地提及真空微电子学的主要进展（如：场发射阵列，场发射显示器和微波毫米波器件等）后，主要叙述了发展真空微电子微波管的主要内容，问题及其意义，场发射阵列的三个重要特点（冷阴极，高发射能力和栅极控制）可用于发展新一代的高频率，高效率，高功率，超小型和长寿命的面向２１世纪的高性能微波管：真空微电子微波管，双栅极场发射阵列，电子流的形成与维持，与其相匹配的互作用电路，特殊的器件结构和相关的制管工艺     

乙烯裂解炉炉管失效原因分析

利用金相显微镜、X射线衍射仪、光谱分析仪等测试仪器,通过对炉管的材质、外观形貌、金相组织、组分组成等方面进行检测,分析了乙烯裂解炉炉管失效的原因.结果表明,材质为Incoloy 800 H合金的裂解炉管可满足乙烯裂解工况的工艺要求,炉管失效主要是由于高温过热引起的氧化腐蚀破坏所致,另外管内介质对腐蚀也有促进作用.     

Void Transport after Steam Generator Tube Leakage in Natural Circulation Lead-cooled Fast Reactor

For lead-cooled fast reactors, steam generator tube leakage and/or rupture (SGTL/R) is one of the safety issues. During SGTL/R, high-pressure water from secondary side of main heat exchangers is injected to lower-pressure primary side. It may have significant negative impact on the integrity of structures nearby, the flow and heat transfer capabilities of the primary system and the reactivity of the core. The transport of steam bubbles and subsequent void accumulation in the primary system of SNCLFR-100 were addressed in the paper. Based on ANSYS FLUENT, Lagrangian tracking of steam bubbles (voids) in Eulerian flow field was performed to identify the locations and traces of steam bubbles after SGTL. The core safety characteristics under SGTL/R accident were also evaluated. The results show that the leakage location, bubble size and the liquid contamination all have influence on the void transport. For the contaminated primary system of a lead-cooled fast reactor, the occurrence of SGTL with a low leakage location may significantly affect the normal operation of the reactor.     

某自备电厂锅炉水冷壁管穿孔原因

某工业园区自备电厂锅炉水冷壁管在运行期间多次发生穿孔事故,通过内壁垢样分析和金相检验等方法,结合现场工况,对水冷壁管的穿孔原因进行了分析.结果表明:锅炉内水的电导率和SiO 2含量偏高,且现场缺少在线仪表监测,造成内壁结垢,继而引发了垢下局部碱腐蚀,造成管壁减薄至无法承受工作应力而穿孔爆裂.     

Effect of oil-solubility catalysts on the low-temperature oxidation of heavy crude oil

Due to low oil recovery factor in heavy oil reservoir, air injection with catalyst becomes a competitive technology to effectively reduce viscosity of crude oil as a result of the low cost and small environment pollution. This paper determined the feasibility of air injection with catalyst in a heavy oil reservoir through static and dynamic experiments. The results indicated that under the effect of catalyst, oxidation between heavy oil and air could significantly reduce the viscosity of crude oil. The optimal catalyst contained 0.7?wt. % oil-solubility organic acid copper and 0.5?wt. % sodium hydroxide. With the oxidation time increasing, viscosity of crude oil decreased and oil recovery factor increased. With temperature increasing, viscosity of crude oil decreased sharply and oil recovery factor increased. The oil recovery factor of air huff-n-puff process was 30.2%. Air injection with catalyst in the reservoir is a promising technology.     

制氢装置炉管花斑红管的原因分析和解决办法

中国石化石家庄炼油化工股份有限公司制氢装置在生产运行过程中两次出现转化炉炉管表面花斑红管现象,转化出口气体中甲烷含量超标。对炉管产生花斑红管的因素逐一分析后认为：转化炉火嘴偏烧火焰舔炉管、催化剂粉尘积聚导致转化催化剂轻微积炭是主要原因。通过增大转化水碳比、减小生产负荷消除了炉管花斑红管现象,转化出口气体中甲烷含量恢复到指标范围内。     

中心管爆炸开舱战斗部破片抛撒速度计算方法研究

推导了圆柱状密实接触中心管爆炸开舱战斗部破片抛撒速度估算Gurney算式。对在中心管破裂后爆炸产物继续膨胀给设置在靠近蒙皮内表面处破片产生运动速度的作用,提出了作分步处理的设计计算方法。     

高分辨率显示屏特性分析用光学透镜设计

描述了高分率显示屏特性分析用的光学透镜的特点和设计要求。分析了调焦镜头和镜头位置调节两种结构的优缺点，推导了屏厚变化（即物距变化）对测量精度影响的表达式。给出了设计实例。实验测量结果与理论分析基本上一致。