Study of the Swirl Atomizer Performance Based on the XFlow

离心式喷嘴在各类发动机之中有着大量的应用，究其原因，是由于其具有优良的雾化性能且容易制造、价格低廉，在航空领域应用甚广。为了使航空发动机燃烧质量更高，离心式喷嘴需要被严格地设计以达到所需要的雾化效果。因此，我们需要深入地研究喷嘴几何结构对于雾化性能的影响，从而为喷嘴的制造提供指导性的意见。 在本篇论文中，通过对数值计算软件XFlow的应用，可以得到离心式雾化喷嘴内部的流场运动分析。这款软件的理论基础是格子波尔兹曼方法，而该方法是利用介观理论来描述流体的运行状况，通过这种介于宏观和微观的研究方法，从另外一个角度来描述所要解决的问题。通过与辛辛那提大学所制作并进行实验的大尺寸离心式喷嘴模型的实验...Swirl atomizers have a great use in air-breathing gas turbine engines, especially in aerospace propulsion area, as they have excellent atomization features. Meanwhile, it is cheaper to manufacture swirl atomizers than other atomizers. To control emissions, it is essential to design some swirl atomizers that can produce spray with a particular droplet size distribution. Thus, the influence caused b...学位：工学硕士院系专业：航空航天学院_航空宇航推进理论与工程学号：3202013115287

中国語語気助詞の使用に見られる対人関係上の志向性

Tohoku University博士（文学）博士学位論文 (Thesis(doctor))要約のみthesi

Tapping the Potential of Vocational School Students --From the Perspective of Multiple Intelligences Theory

职业教育是教育事业中与经济社会发展联系最直接、最密切的部分，是把科学技术转化为现实生产力的桥梁。无论是发达国家还是新兴工业化国家，都把发展职业教育作为振兴经济、增强国力的战略选择之一。中等职业学校的教育目标是培养与社会主义现代化建设要求相适应，德智体美等全面发展，具有综合职业能力，在生产、服务、技术和管理第一线工作的高素质劳动者和中初级专门人才。但是培养目标中高素质劳动者和中初级专门人才与中等职业学校生源现状有很大的差距。 本文从多元智能理论视角出发，以郑州信息技术学校054班为研究对象，通过转变教师教学理念、丰富课程设置、加强班级管理、实施多元评价四个方面，进行了开发中职生潜能的实践研究，...Vocational education plays an important part in socialist construction. It’s a bridge of turning science and technology into productive force. In developed countries and new industrial countries, in order to revitalize economy and strengthen aggregate national strength, developing vocational education is one of their strategic choices. It is an object of secondary vocational education to bring up ...学位：管理学硕士院系专业：教育研究院_教育经济与管理学号：X20034301

虚拟外骨骼机构的仿真研究

可穿戴型下肢外骨骼机器人,也简称为助力腿,可以用来完成依靠人的自身能力无法单独完成的远行、负重、爬楼等任务。通过对人体下肢的骨骼结构和运动情况进行分析,设计了一套助力腿机构;通过建立三维立体模型,对机构运动情况进行模拟仿真研究,并与人体运动的实际情况进行对比

On Categories of Knowledge and English Teaching

在简述知识的定义及分类的基础上,着重探讨陈述性知识和程序性知识不同的功能与作用,并以被动语态为例,演示如何区分英语教学中的知识类型,以及这种区分对于英语教学的意义。On the basis of expounding briefly the definition and the classification of knowledge, the paper inquires into the different function and effect of declarative knowledge and procedural knowledge on English teaching. With an example of the passive voice, it demonstrates how to distinguish the types of knowledge in English teaching and the signification of this classification

Design of Hydro-ski and Numerical Simulation of the Hydrodynamics of Wing-in-ground Effect Vehicle

地效翼船的发展过程中,必须解决一大技术性难题:起飞过程中升阻比较小,使得船身无法快速抬离水面。基于以上问题,根据船身理论、机翼设计理论和冯·卡门入水冲击理论等,设计一种应用于地效翼船的水橇,利用CATIA对水橇进行三维建模,并使用fluEnT软件对该水橇进行水动力特性的数值模拟。结果表明:水橇的升力系数和阻力系数随着攻角的增大而增大,其升阻比呈抛物线趋势,在攻角为5°左右到达最大值;相对其他来流速度,水橇在来流速度2M/S时的升力系数、阻力系数和升阻比更大。In the development course of wing-in-ground effect vehicle,there remains one major technical issue,i.e.in the process of taking off the lift-drag ratio is too small to lift the aircraft body out from the water rapidly.To solve this difficult problem,according to the hull theory,wing design theory and the Theodore Von Karman water impact theory,a new hydro-ski applied in wing-in-ground effect vehicle is designed,and the software CATIA is used to draw 3Dmodel of the hydro-ski,and the FLUENT is used to figure out the vehicle's hydrodynamic characteristics.Results show that lift coefficient and drag coefficient of the hydro-ski increases as the angle of attack increases.In addition,the lift-drag ratio curve is shown as a parabola,peaking at 5°.In the meantime,when the incoming flow velocity is 2m/s,the lift coefficient,drag coefficient and CL/CDis larger than that of the others