涡

The force of low-level frontal zone disturbance is a major factor of the development of middle and low level cyclone. The large center of negative geopotential perturbation inversed by low-level disturbance potential vorticity is located in the front of cyclone providing a favourable condition for the eastward moving and development of cyclone. The high-level system plays a role of indirect force action. The interaction of the development of high-level trough and ridge and low-level frontal zone becomes an important mechanism of the developing of cyclone.

低层锋区扰动强迫是中低层气旋发展的最主要因子，低层位涡扰动反演所得的负位势扰动大值中心位于气旋的前方，有导前现象，为气旋继续东移、发展提供一个铺垫；高层系统起着间接强迫作用，高层槽脊系统的发展和低层锋区的相互作用所导致的斜压扰动成为气旋发展的重要机制。

The motion of PVC generated in cyclone separator was measured under different conditions by using this method.

在不同的实验工况下，采用该方法实测了旋风分离器内涡核的运动规律。

On the basis of three-step finite element method, the flow past circular cylinder with splitter plate is analyzed by using large eddy simulation turbulent model in single direction flow.

在三步有限元数值方法的基础上，利用大涡模拟湍流模型对单向流作用下带横隔板圆柱绕流进行了数值分析。

Dynamic characteristic testing is applied to evaluate the damping system performance by comparing damping force, damping ratio and damping time constant on various designs.

接著对所完成的转轴涡电流减振系统进行动态特性的测试，以减振力、阻泥比和减振时间常数来评比减振系统之性能表现。

Volute spring series win outstanding new products special awards in 2002 China General Machine Components Industry Association. Steyr valve inside and outside spring of engine, automobile suspension spring, die spring series won the excellent new products prizes. GW2.4S (4G6) valve spring of engine series won outstanding new products special awards in 2003 China General Machine Components Industry Association. Geely MR479Q valve spring of engine, power tool spring, high stress piston pin-spring flange series won excellent prizes meanwhile. Valve spring series won the excellent new products prizes in 2004 China General Machine Components Industry Association. Hydraulic pressure spring won excellent prizes meanwhile.

涡卷弹簧系列荣获2002年中国机械通用零部件行业优秀新产品特等奖；斯太尔发动机气门内、外弹簧、汽车用悬架弹簧、模具强力弹簧系列同时荣获新产品优秀奖；GW2.4S(4G6)气门弹簧系列荣获2003年中国机械通用零部件行业优秀新产品特等奖；吉利MR479Q气门弹簧、电动工具冲击弹簧、高应力活塞销档圈系列同时荣获优秀奖；阀门弹簧和液压弹簧分获2004年中国机械通用零部件工业协会优秀新产品特等奖和优秀奖。

It is found the special difference between micro-turbojet engine and micro-turbofan engine in the research. A new concept of high-and-low blade and equivalent compressor is also put forward, meantime it is found the way to solve the problem.

在以上研究中，看到了微涡扇发动机不同于微涡喷发动机的的特殊点，由此提出了高低叶片、等效压气机这两个新的概念和相应的研究思路，找到了解决问题的途径和方法。

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。

It is also possible to predict both the frequency and amplitude of pressure fluctuation at the inlet and outlet of all parts of turbine, as well as the phenomenon of rolling vortex in the draft tube.

从而得出水轮机各部件内的瞬时流态和随时间的变化过程，预测了水轮机各部件内压力脉动的频率和幅值，并显示尾水管内的旋转涡带现象。

The result clearly reappearances vortex movement at the part load condition and flow field and pressure distribution in the draft tube under different conditions,which were much more rational and similar to practical experiment results,and which assure that the inlet velocity model is very close to the authenticity.

计算结果后处理清晰再现了小流量工况尾水管涡带的运动形式和三种工况下尾水管内部的流场和压力分布，情况和实际符合较好，验证了所建立的进口速度模型的逼近真实性。

It is not enough to resolve all of the problems related to the hydraulic stability only to analyze the stable field in passing components. Finally, the paper numerically simulated the transient field in prototype's draft tube under different operating conditions by means of Reynolds stress turbulence model and analyzed the law of motion of vortex rope as well as the performance of low-frequency pressure pulsation and compared with field test results.

仅仅对机组的过流部件进行稳定场的CFD数值分析还不足以解决所有与水轮机水力稳定性有关的问题，因此在本论文的最后，采用雷诺应力湍流模型对真机尾水管在不同运行工况下进行了非稳定场的CFD数值解析，分析涡带的运动规律及其产生的低频压力脉动特性，并与真机的试验结果进行了比较，结果比较吻合。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐