微机形成的非球面干涉图

介绍一种新的非球面检测方法。用微机技术，对偏离球面很小的非球面作模拟非球面的干涉，获得理想的非球面干涉图。用模拟的理想干涉图作“样板”，使高次非球面的面形在激光球面干涉仪上进行精确测量成为可能。提供了四种类型小非球面度的高次或二次非球面干涉图。给出了几个在CQG一1型激光球面干涉仪上作出的测量结果。其测量精度约为0．5λ。     

A Feasibility Study About Using SiO2 Nanofluid Screen Mesh Wick Heat Pipe for Cooling of High-Power LEDs

Effective and timely heat removal from high-power light-emitting diodes (LEDs) is crucial to their performance and lifetime. The strategy of using a screen mesh wick heat pipe with SiO₂ nanofluid as the working fluid for LED heat dissipation is comprehensively evaluated. An experimental system is set up to study the heat transfer performance of the heat pipe. The obtained experimental results give optimal conditions/parameters for the heat pipe: 60% charging ratio, 30° incline angle, and 1wt% concentration of the nanofluid. Compared with a heat pipe using the secondary distilled water as the working fluid, the thermal resistance of the heat pipe using the SiO₂ nanofluid as the working fluid is generally reduced by around 35–40% for the investigated heat load range of 1–60 W. Based on an equivalent heat conductivity of the SiO₂ nanofluid heat pipe derived from the experimental results, an Icepak modeling effort for the cooling system of a 60-W LED lamp is then expended. The numerical results show that the temperature of the LED lamp remains low and quite uniform across the LED chip region, indicating the technical feasibility of using this class of heat pipes for cooling of high-power LEDs.     

Influence of the initial HI on the multiphase Bunsen reaction in the sulfur–iodine thermochemical cycle

In the sulfur–iodine cycle flowsheet, HI may exist in the feeds of Bunsen reaction. The effects of the initial HI and the operating temperature on the kinetic process and thermodynamic equilibrium of the multiphase Bunsen reaction were investigated. Increasing initial HI concentration (HI/H₂O = 0–1/18) or temperature (303 K–358 K) amplified the reaction kinetic rate, and led to the earlier appearance of liquid–liquid separation and less time to reach the thermodynamic equilibrium. But the separation became difficult for further increase of the initial HI content. The liquid–liquid equilibrium (LLE) phase separation was enhanced with rising temperature. An increase in the initial HI content slightly weakened the LLE phase separation at a lower temperature, while at 345 K and 358 K, the LLE phase separation characteristics showed little variation in the HI/H₂O molar ratio range of 0–1/18. A hyper-azeotropic HI concentration in the HIx phase was obtained with feeding HI. The conversion of SO₂ lowered as the initial HI content and the temperature increased.     

煤矸石堆放区的环境效应研究

我国系一产煤大国 ,也是矸石产量大国 ,矿山由矸石山导致的环境污染日趋严重。本文详细研究了煤矸石堆放区的污染效应、燃烧效应、占地效应以及爆炸效应和稳定效应等问题     

面板坝数值分析中接触面模型与接缝模型述评

对混凝土面板堆石坝数值分析中的接触面模型和接缝模型进行了较为全面的总结,并评析了各种模型的优缺点。在评析的基础上,建议了面板坝数值计算中可供使用的几种目前较为理想的接触面模型和接缝模型。     

无机元素在生物质气流床气化中挥发性研究

利用一套小型生物质层流气流床气化系统进行木屑气化试验并对残炭进行收集称重.通过ICP及EDX-SEM仪器对残炭灰成分和残炭形态进行分析,研究了无机元素在生物质气流床气化过程中析出挥发的问题.结果表明:随着反应温度的升高,各无机元素的挥发率也随之升高,其中碱金属Na、K,碱土金属Mg、Ca的挥发高峰集中在600～800℃之间,而非金属元素P、S、Cl的挥发高峰多在600℃以下;氧配比为0.8时,Na的挥发率在1400℃时达到了76%,K的挥发率也达到了72%,而氧配比为0.2时,无机元素的挥发率相对偏低,其中Na的挥发率在1400℃时为63%,K的挥发率为61%.     

CT6—5催化剂在重庆天然气净化总厂引进装置的工业应用

斯科特尾气处理方法自80年代初引入我国天然气加工行业以来,工业生产中长期依赖于进口的加氢催化剂,本文认真总结了西南油气田分公司天然气研究院生产的CT6－5加氢催化剂在重庆天然气净化总厂引进装置的使用情况,从使用性能各方面与进口的SHELL－534催化剂进行比较,证明了CT6－5完全能代替进口加氢催化剂。     

琼东南勘查区天然气水合物地震属性分析研究

天然气水合物是一种由气体和水分子组成的笼形包合物,形成于低温、高压条件下,对环境有重要影响。海洋温压条件的变化均可使水合物失稳分解,导致海底滑坡,甚至引发一些重大地质事件。针对南海琼东南勘查区的地震数据进行气水合物属性分析,在总结前人研究成果的基础上,形成了针对本工区气水合物检测的地震属性分析、精细速度分析、纵波阻抗反演研究、极性分析等技术手段及方法,并综合评价各种方法所能反应的地质特征,圈定有利区,提高了琼东南地区天然气水合物的预测精度。     

高集油田高6 块阜宁组剩余油分布规律

高集油田已进入高含水后期开采阶段,为了提高采收率,需要寻找剩余油开采潜力.高6块是高集油田稳产的主力区块,在对高6块阜宁组精细油藏描述的基础上,根据单井隔夹层识别、沉积微相划分、流动单元划分和剩余油饱和度计算,结合动态资料,分析总结了该区剩余油控制因素和分布规律.结果表明:垂向上不同流动单元组合与隔夹层空间配置关系会形成不同的剩余油分布模式;平面剩余油分布主要受沉积微相和流动单元的控制.通过研究,识别了高6块沉积微相差异型剩余油、小隔层遮挡剩余油、夹层型剩余油和流动单元型剩余油共4种剩余油类型,其中小隔层、夹层封挡的砂体内部,河道侧翼溢岸砂沉积及Ⅱ类、Ⅲ类流动单元是剩余油的富集区.     

东濮凹陷地热资源评价

地热资源是一种极具开发利用价值的清洁能源,本文对东濮凹陷的地质背景和地热地质条件进行了分析,并采用热储法对其地热资源进行评价。