长江口北支水道水沙特性分析

从实测资料出发,结合水流数值计算成果,对长江口北支水道的水流、泥沙和含盐度等资料进行分析,得出了北支水道的水沙特性,并分析了水沙变化与河床变化的相互关系.北支水道在1958年南通河段河势控制后,径流分流比逐年下降,并渐趋稳定于3%左右.北支水道受径流影响越来越小,主要受潮流作用.随着水沙特性的逐年变化,北支水道0 m以下槽蓄容量逐年减小,并渐趋稳定,北支上段为逐年淤积最快的区域.由此反过来影响了水沙条件的进一步变化,使北支上段平均潮差增加,北支的会潮点由崇头附近下移至青龙港附近.     

油气沉积学原理及其在勘探开发中的应用

本文以油气藏形成条件中的生、储、盖、运、圈为纲讨论了油气勘探沉积学;以油气藏开发过程中与沉积、成岩的关系讨论了油气开发沉积学。在油气勘探沉积学中重点论述了陆相沉积与储层及圈闭的关系;在油气开发沉积学中重点论述了储层研究的基础—储层的沉积属性和成岩特征。强调储层沉积、成岩研究应成为储层评价最重要的内容。     

Spouted and spout-fluid bed combustors 1: Devolatilization and combustion of coal volatiles

The devolatilization and volatile combustion of a single coal particle in spouted and spout-fluid beds have been studied. The results showed that the flame extinction time increases with the particle diameter, and decreases with the bed temperature. When the bed temperature and the air flow rate were fixed, the operation modes (spouted or spout-fluid bed) showed less effect on the mean flame extinction time. A mathematical model of the spouted bed mode for preignition and postignition periods has also been developed assuming the devolatilization rate to be controlled by heat transfer and multireaction pyrolysis kinetics based on volatile products. Ignition, heat transfer back from the volatile flame to the particle surface, variation in flame temperature, and the hydrodynamics of SB are taken into account. The model predictions, with some adjusting parameters, were in good agreement with experimental results.     

塔里木河流域源流及干流水均衡分析

通过对塔里木河流域源流及干流的径流变化和水均衡分析 ,表明塔里木河源流来水基本稳定 ,由于源流灌区引水以及渗漏蒸发等损失加剧 ,干流水量存在减少趋势 ,并加剧了水量的时间分配不均 ,不利于干流农业的可持续发展和生态环境的维护与改善     

宁夏引黄灌区渠道防渗衬砌技术研究

对宁夏引黄灌区渠道防渗衬砌的形式、防渗衬砌效果、渠道防渗衬砌工程的技术指标、冻害特征、防治措施进行了综合应用分析与研究,提出了不同级别渠道适宜的衬砌形式、推广渠道防渗衬砌的技术要求,供灌区节水工程改造、渠道衬砌工程参考。     

Results of familiarization of and prospects for a procedure for the burning of wastes in a vortical fluidized bed

Problems that have arisen during tune-up of the production line for the thermal processing of solid household waste by the method of burning in a vortical fluidized bed (principally, a new technology for Russia), and means of their solution are presented. Investigative studies are cited. __________ Translated from élektricheskie Stantsii, No. 6, pp. 20–26, August, 2006.     

EXPERIMENTAL RESEARCH ON EFFECT OF MAIN-FLOW SWING ON FLOW TURBULENCE STRUCTURE

It is mentioned in this paper that the adjustment of flow structure occurs when themain-flow swings.The changes of turbulence structure and flow energy loss in the indoor rivermodel are measured.The experimental data are presented for the first time for the further studyof complicated river flow structure.     

一种控制盐层段井眼闭合率的钻井液密度新公式

针对钻井过程中钻遇的盐层段井眼蠕变缩径问题,利用弹塑性力学理论,蠕变本构方程采用Heard蠕变方程,在平面应变和均匀地应力假设下,推导出控制井眼收缩的钻井液密度新公式,该公式与前人推导的公式不同。通过理论分析,指出产生差异的根本原因在于蠕变应力差(极坐标下表示的径向应力与切向应力之差)公式的推导上,用有限元法计算结果对理论公式进行检验,证明是可行的。对文中的力学模型采用有限元法建模、求解,利用求解结果对各应力差公式进行验证,得出:根据文中公式计算结果与有限元法计算结果完全一致,而据前人公式计算结果偏离有限元计算值较大,从而间接证明了该钻井液密度新公式的推导更严密,更准确。     

Scale‐up and Spouting of Two‐Dimensional Beds

The objective of this paper is to present an analysis on the scale‐up procedure of two‐dimensional spouted beds. The task was carried out with three different beds measuring 0.15, 0.30 and 0.80 in width. The conditions of scale‐up were studied through geometrical similitude analysis. Some parameters of scale were adimensionalised, tested and validated in order to propose relationships capable of predicting values of dependent properties. Those relationships should be followed in a prototype of an equipment of industrial scale. The study permitted the development of correlations to predict values of maximum pressure drop, minimum spout velocity and maximum height of spouting.     

Spouted bed drying of cork stoppers

The spouted bed is commonly used to dry granular particles as it displays some special characteristics which render it capable of performing cyclic operations, with particles that are very difficult to fluidize under a different type of bed.Information on the characteristic drying rates of cork stoppers is still very limited in the technical and scientific literature, and until now no published data was found on the spouted bed drying of cork stoppers.The characterization of the drying performance of Port wine cork stoppers was carried out in a laboratory scale spouted bed. Characteristic drying curves were determined with 29 mm × 21 mm cork stoppers under several operating conditions. Values for the effective diffusivity were obtained in the range of 1.36 × 10⁻⁹ to 4.44 × 10⁻⁹ m²/s, with the temperature dependence represented by an Arrhenius-type relationship. The activation energy obtained was 28.72 kJ/mol.