数值技术

And has brilliant prospect due to its simple structure, good economy and energy saving performance.Based on the full scale passive solar experimental building in DUT, in which the researcher carried experiment as the main method and the CFD simulation as the minor method, the research focuses on passive ventilation formed by the Trombe wall. This paper analyzed the indoor thermo and humidity performance of passive solar building with Trombe wall, and the different ventilation patterns in different seasons, revealing the role of passive ventilation in improving indoor environment. Also the paper researched the characteristics of passive ventilation on air flow and heat transfer mechanicsms, and put forward the best control and adjusting method. Meanwhile the paper gained an empiric formula in use of calculating the natural convection heat transfer and found the key factor of influing the indoor environment.

本研究以被动式采暖降温技术为依托，采用实验和CFD数值模拟的研究方法，重点研究了新型被动式太阳房在不同气候条件下室内热湿环境的动态变化规律，分析不同季节下被动式太阳房内不同的被动式通风模式以及不同被动式通风模式在改进室内热湿环境方面的作用：揭示了特定被动式通风流动和换热特性、控制与预测方法；得到了计算被动式通风对流换热量的经验公式以及影响室内热湿环境的关键因素；了解了含有特朗贝墙体被动式太阳房的自身优势和仍待改进的方面；在实体大被动式太阳房实验技术方面积累了一定的经验。

How to simulate random distribution of cleats in coal rock is key technique for simulation of methane recovery.

煤层中随机裂隙展布模拟技术是瓦斯抽放数值模拟中的关键技术。

Using the FLUENT software of fluid dynamics computation,the water heights around these different angles of groins was computed. The characteristics of the variation and the general rules were summarized,which could provide the theoretical supports for the skill of Slalom Kayaking.

运用计算流体力学FLUENT软件，对4种挑角的丁坝附近水流场的水位进行了数值计算，总结速度的变化特点和一般规律，为皮划艇激流回旋运动技术提供理论上的支持，为运动员改进和完善运动技术提供科学依据。

With the development time extension, the development effect worse gradually of Chaoyanggou oilfield, There is some low permeability thin oil that traditional production techniques can not realized in Fuyu and Yang da cheng zi layer of Chaoyanggou oilfield. The crude oil viscosity is high; the relationship between viscosity and temperature is sensitive. The viscosity has big fluctuating along with the temperature change. According to the development experience of inspissated pool and the research results of numerical simulation by STARS, thermal recovery technique is an efficient method used to improve the development effectiveness of low permeable and high viscosity blocks.

随着开发时间的延长，朝阳沟油田开发效果逐渐变差，扶余、扬大城子油层存在常规开采工艺技术无法满足的低渗透稀油，根据稠油油田开发经验和应用商业化软件 STARS 热采模型蒸汽吞吐数值模拟研究结果，采用热力采油技术是改善低渗透、高粘度区块开发效果的有效途径，因此在朝阳沟油田开展热力采油现场应用研究。

ABSTRACT Supported by National Natural Science Fund, the research project of gas flow and spray process in the chamber of I. D. I. Engine is studied in detail.

随着计算机技术和相应学科的飞速发展，内燃机工作过程的多维数值模拟技术在内燃机的开发和研究过程中正在发挥着不可替代的作用。

Structure of aero- engine case under the effect of combined axial pressure and end twist;2. The integration of CAD parametric modeling,finite element method,classical strength calculation theory with modern optimal design techniques produces a complete and systematic design procedure for performing parametric optimal design of turbine disk, engine case and turbine shaft.

开发了基于大型有限元分析软件Ansys的燃气涡轮发动机辅助设计系统，该系统将CAD参数建模技术、工程有限元数值计算方法、经典强度计算理论与现代优化设计技术相结合，实现了涡轮盘、机匣和涡轮轴典型零件的参数优化设计的完整设计流程，建立了结构优化设计平台；并通过机匣的结构优化设计实例，验证了燃气涡轮发动机辅助设计系统的有效性。

The study of methane-accumulation prevention and methane drainage theory and technology is the key for solving the problem of mine methane explosion accidents while the study of coal and methane outburst prediction together with the preventive measure sand technology is the basic guarantee to the controlling of coal and methane outbursts.

防止瓦斯积聚与瓦斯排放理论及其技术的研究，是解决矿井瓦斯爆炸事故发生的关键所在，而研究煤与瓦斯突出的预测及其防治措施技术是控制煤与瓦斯突出发生的根本保证。本文根据上述两方面存在的瓦斯问题，以理论、实验、计算机数值模拟和井下试验相结合的方法开展研究工作。

The applications of modified Jameson's scheme to the complex flow around the missiles with canards and tails, result in good agreement between computations and experiment data of the standard missile model of U.S.A..

将改进的Jameson格式应用到多翼导弹的三维流场计算中，并使用分区技术和三维椭圆微分方程数值网格生成技术以精确模拟此复杂构形的复杂流态，计算结果与美国导弹标模的实验吻合很好。

Because the techniques of the biochemical waste treatment are very important, the techniques of the cultivation of the microorganism have received more attention in recent years. A study is conducted to analyze the steady states and dynamic bechavior of the reactions of the cell-substrate and the prey-predator interaction in two chemostats in series. For the reaction of cell-substrate in two chemostats in series, if the specific growth rate of the Monod model is used for the cell , there are three types of steady states for this reaction system. These three types of steady states and stability are analyzed in detail. The dynamic behavior of this reaction system is analyzed by the numerical method and computer graphs. The results show that the dynamic behavior of this system consists of stable steady states.

由於生物废弃物的处理技术相当重要，故最近几年来微生物的混合培养技术深受大家的重视，本研究实施菌类－基质(Cell-Substrate)和被捕食者－捕食者(Prey-Predator)相互作用之生化反应在两个生化反应槽串联之稳定状态和动态分析，对於菌类－基质之生化反应，若以Monod模式来表示菌类之比生长速率，则此两个生化反应槽串联之反应系统共有三种型态之稳定状态，本研究对此三种型态之稳定状态和稳定度作深入的分析，对於此反应系统之动态行为，则由电脑运用数值分析的方法及电脑绘图进行分析工作，动态分析的结果显示此生化反应系统之动态行为，以稳定之稳态为主。

In this paper. Based on the analysis of chemical process equipments , the virtual manufacturing architecture for the chemical process equipments were discussed. As an example , the digital modeling approach , numerical simulation , virtual design and virtual manufacturing environment for the spiral gas liquid separator were studied.

在分析化工过程装备特点基础上，对过程装备虚拟制造技术平台的体系结构进行了探讨，以典型过程装备螺旋片导流式气液分离器为例，对其数字化建模方法、数值仿真技术、虚拟设计和制造环境进行了研究。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。