地层自然造斜特性的测井评价方法研究

地层可钻性各向异性及造斜特性评价对定向钻井和直井防斜均具有重要意义。用数理统计的方法分析了垂直于层面和平行于层面岩石可钻性的相关关系,用垂直于层面岩石可钻性的评价方法评价了平行于层面岩石可钻性,由此导出根据垂直于层面岩石的可钻性评价地层可钻性各向异性的模型。根据声波在横观各向同性介质中的传播规律,建立了利用测井资料反演岩石的各向异性参数进而求取垂直于层面声波波速的方法。由垂直于层面方向的声波速度计算出垂直于岩石层面方向的岩石可钻性,从而可以对地层可钻性各向异性及造斜特性进行评价。对塔里木油田克拉苏地区的造斜特性的评价结果表明:用该方法评价出的地层可钻性各向异性及造斜特性能正确反映被评价地层的特性。     

阀门用金属波纹管力学特性研究

在对阀门用金属波纹管有限元结构分析的基础上,比较了Ω形和U形金属波纹管承载和变形补偿能力.研究表明,对几何参数相同的Ω形和U形金属波纹管,Ω形金属波纹管承受内压的能力大于U形金属波纹管,而U形金属波纹管承受轴向力的能力则大于Ω形金属波纹管.在相等的轴向力作用下,Ω形金属波纹管轴向补偿量较大,但在各自最大轴向载荷作用下,U形金属波纹管能达到的轴向补偿量更大.     

空分冷箱内铝合金管道焊接及X射线检测注意事项

介绍了空分冷箱内铝合金管道焊接特性,结合铝合金管道焊接过程中常见缺陷的特点及产生机理,简述了如何合理编制焊接工艺,以减少焊接缺陷产生,保证焊接接头质量.并对铝合金管道对接焊缝X射线检测注意事项进行了阐述.     

碳酸盐岩溶洞型储层综合识别及预测方法

多期岩溶作用使碳酸盐岩溶洞型储层各向异性特征显著。由于溶洞被少量充填、大部分充填或完全充填,使溶洞储层的地球物理特性变得更为复杂,单因素的地质或地球物理分析方法导致溶洞储层的钻井成功率较低。对塔河油田11区的综合研究表明,碳酸盐岩有效溶洞储层的发育应同时具备3个常规地震剖面波形特征,即断裂+串珠状反射+强波谷;一间房组顶面0~20ms振幅变化率特征为较强—极强;波阻抗特征为极低的波阻抗值(绝对波阻抗值小于1.2×10⁷kg/m³)。利用这3个条件可识别和预测有效溶洞和被完全充填的非储层溶洞,有效实现了碳酸盐岩溶洞型油藏的滚动开发。     

Theoretical and experimental studies on low-temperature adsorption drying of fresh ginger

The working principle of low-temperature adsorption drying and the advantages of its application for biological materials drying were introduced in this paper. By using fresh ginger as the drying material, the effects of temperature and relative humidity on its drying characteristics were examined. The results show that the drying rate increases with the temperature increasing or the humidity decreasing. The drying time to the equilibrium is almost the same under different humidity conditions, but low equilibrium moisture content can be acquired under low humidity. The shrinkage characteristics of fresh ginger were also studied. The change of its surface appearance during the drying process was characterized by the new Charged Coupled Device (CCD) and the Environmental Scanning Electron Microscopy (ESEM) technique. A mathematical model of drying dynamics was set up according to the experiments.     

船用柴油机排气消声器性能试验台的研制

设计并建造了一种用于船用柴油机排气消声器声学和气动性能试验研究的台架.台架以两个高压离心风机串联增压的方式作为风源,采用航空燃气轮机燃烧室作为燃烧器.烟气的温度和流量由控制系统调节实现,控制系统分自动控制和手动控制,方便操作.初步的试验结果表明：研制的台架气体流量范围0～8 m^3/s,温度调节范围20℃～600℃,可以满足2000 kW以下发动机排气消声器的试验要求.     

Effects of a kind of non-smooth blade on the performance of an axial fan

This paper presents an experimental investigation of effects of a kind of streamwise-grooved blade on theperformance of an axial-flow fan.The flow field at 25% chord downstream from the trailing edge at hub wasmeasured using a 5-hole pressure probe at different mass-flow conditions.The fan performance of the grooveblades was compared with that of the smooth blades.The measurement results indicate that:(1)the non-smoothblades increase mass flow of the fan at the same throttle conditions except a near stall condition;(2)thenon-smooth blades reduce the relative total pressure loss in the rotor passage and increase the fan's total pressurerise at the test mass-flow conditions except the near stall condition;(3)Negative benefits are obtained at a nearstall condition when the smooth blades are replaced by the non-smooth ones.The fan mass flow decreases 0.9%while the total-pressure rise decreases 2.4% at the near stall condition.     

新型135MW低压外缸的开发和设计

低压外缸既要支撑内缸又要回收末级排汽余速，要求具有良好的刚性和气动特性，东方汽轮机厂原135MW低压外缸分前、中、后三段，由于轴向长度小、横向宽度大，每段的刚性都不是太好，造成加工及总装难度较大；更由于135MW汽轮机低压排汽缸的轴向长度较短，使得排汽缸的经济性较差，能量损失系数∈较大。为此，东方汽轮机厂将135MW汽轮机的低压外缸改为两段式的结构，并对内部构件进行优化，得到了刚性和气动特性俱佳的低压缸。     

相变-液浴式热水锅炉工作特性的实验研究

设计建造了一套燃气热水锅炉试验系统，通过实验对相变-液浴式热水锅炉的工作特性作了测量分析。结果表明：该锅炉在运行中，根据热负荷的高低，其传热方式会在“相变”、“液浴”、“相变-液浴并存”三种状况之间自动转换，对此可以用一幅工况图来描述；在实验范围内，该锅炉的“相变换热”工况传热系数大约为“液浴换热”工况传热系数的1．7倍。     

单相磁滞—磁阻电动机的稳态特性

磁滞-磁阻电动机可有效地同时利用磁滞效应和磁阻效应产生的电磁转矩,因此其性能优于普通的磁滞电动机。本文举实例对比磁滞-磁阻电动机和普通磁滞电动机的额定运行性能和失步点的性能,理论计算结果与试验值比较接近。