轴流

Product brief introduction: GXF is inclined shed fan to be bosomy shape structure, the characteristic with its small imports and exports expedited the velocity of flow of air current, pressure coefficient is tall, shed fan with general axis below the circumstance of equal opportunity order, its discharge pressure all is more than general axis to shed the discharge of fan, pressure.

制品介绍：GXF斜流风机为鼓型构架，其进岀口小的特征加速了气流的流速，压力参数高，同一般的轴流风机一样机号的境況下，其访问数量压力均大于一般轴流风机的访问数量、压力。

In general, the design work with traditional measures is done by hand, which cannot meet the needs of the technology and manufacture. So the author has developed a CAD hydraulic design software fit for lower specific speed axial flow runner, which is easily operated by users.The main research work of this paper is as follows:1 Analyzing the main reason of axial flow power station cannot work well under littler volume of flow in some season and putting forward an improving scheme, pointing out the characters of design under abnormal factors.2 Combined with the development of the industry in our country, the abnormal hydraulic design method of propeller turbine is discussed based on present literature, data and experiment results.3 Guided by the design method of software engineering, a suit of hydraulic design software of Lower Specific Speed Axial Flow Runner is programmed by the object-oriented programming language Visual Basic and a straightforward, concise and standard Windows human-computer dialogue interface is designed for the system, which makes the operation of the system very convenient.4 ActiveX Automation technology is adopted as the interface with AutoCAD and the hydraulic drawings are edited, modified by AutoCAD until hydraulic model drawings according with the demand of engineering practice are output.5 To resolve practice problem, the author has designed a lower specific speed axial flow runner for Duowa Power Station through an example.

论文的主要内容有：1 深入分析很多轴流定桨式水电站枯水季节小流量下不能发电的主要原因，提出减容改造方案，并指出超常规条件下的改造设计特点。2 结合国情及行业发展需要，参考现有资料、文献和前人的研究成果，进行低比转速轴流式转轮叶片水力设计方法的研究，对轴流式转轮叶片的奇点分布法水力设计进行了全面的探索，结合现代计算机技术，找到了一种针对特殊条件的轴流式转轮叶片水力设计方法。3 仔细比较多种AutoCAD二次开发工具后，结合本课题的特点，选用Visual Basic语言，综合应用软件工程的设计思想，进行低比转速轴流式转轮叶片水力设计软件的编制，为系统设计了直观、简洁和标准的Windows人机对话界面，便于用户操作；编程时在考虑到设计条件特殊性的同时，尽量做到程序的通用性，使之可用于解决同一类问题；另外，大部分程序还可移植到普通轴流式转轮叶片水力设计中，具有良好的适应性。4 利用ActiveX Automation技术与AutoCAD接口，对AutoCAD进行二次开发，在AutoCAD下实现水力图的自动生成和编辑，直至输出符合实际工程要求的木模图。5 通过算例，为多哇水电站设计了一个低比转速轴流定桨式转轮，解决其在枯水期小流量下不能发电的问题。

A new distribution is proposed for the sake of the disadvantage of the constant circulation at present. The axial velocity in fornt of the blade intake along the radius reduces linearly, and the velocity trendline behind the blade export is close to parabolic curve, but the circulation should be decided by designers.

文中还对轴流泵设计有重要影响的流型进行了全面的分析和研究，指出现有等环量流型存在的不足，提出了改进流型设计：轴面速度在进口边前直线下降、出口边后呈抛物线分布、环量的分布规律由设计人员给定。

Numerical simulation to three-dimensional turbulent flow in multistage axial compressor blade row is carried out, where high resolution third-order ENN scheme is adopted to catch the shockwave and simulate the turbulent flow correctly, and LU-SGS implicit method is chosen to improve computation rate. A nicety and high efficiency numerical simulating system is thus constructed.

对多级轴流压气机叶栅内三维紊流流场进行数值模拟，采用高精度高分辨率的三阶ENN格式以保证对激波的捕捉和对紊流特征的正确模拟，利用LU-SGS隐式解法提高了计算速度，从而构成了一种既准确又高效的多级跨声速轴流压气机紊流流动数值求解系统。

In the fifth chapter, the stall regulated wind turbines are simulated on the zero-yaw and yawed configurations. The former are solved under non-inertial rotating coordinate system and the latter under inertial coordinate system.

第五章为风轮叶片的流场数值模拟，对失速限制型风轮叶片(NREL Phase-Ⅵ)在轴流和偏航状态下的流场进行了数值模拟，其中轴流状态采用在旋转坐标系下进行求解的方法，研究了风轮叶片在经历失速前后的流场变化、桨叶载荷分布，对所产生的扭矩、以及附加的在挥舞和摆振方向的力矩进行了分析。

To improve the design and analysis of axial-flow pumps, the Computer Aided Design system and the basic methods of flow field simulation and performance prediction base on the Computational Fluid Dynamics are developed in the paper.

本文针对目前轴流泵设计和分析过程中存在的主要问题，建立了完整的计算机辅助设计系统，并通过计算流体动力学手段，建立了分析和预测轴流泵内部流场及外特性的基本方法。

Numerical simulation and performance prediction of interior flow field for axial-flow pump with front guide impeller

得到了轴流泵内部流场的压力分布、速度分布情况，并对分布情况的特征进行了分析，初步了解轴流泵内部流场的流动情况。

After analyzing the numerical simulation results of the impeller blade with different scale, and comparing the flow field distributing, then one kind of double-head anti-unsymmetrical S mode airfoils is found which is suitable to the normal and the reversed blowing for double directions under the design operating condition and which can also satisfy the requirement for the reversible axial flow fan in subway.

分析缩放比例不同的可逆式轴流风机叶型的数值模拟结果，比较各种叶型的流场分布规律，寻找到一种适合于设计工况下正、反双向吹风的双头双机翼反向不对称S型叶型，能够满足地铁用可逆轴流风机的要求。

Anti-Corrosion Products of explosion-proof fans have: DWT-I FRP axial fan roof; DWT-II glass-steel roof centrifugal blower; BF4-72 C-type glass fiber reinforced plastic centrifugal fan; FBT35 FRP axial flow fan; FT30 C-type FRP axial flow fan; FRP DT Multi-wing Low Noise Centrifugal Fan; advertisement FRP fan; PVC4-62 PVC centrifugal fan; PP4-62 polypropylene plastic centrifugal fan; 4-72 stainless steel centrifugal fan; 11-62 stainless steel centrifugal fan.

防腐蚀防爆风机的产品有： DWT-I 玻璃钢轴流屋顶风机； DWT-II 玻璃钢离心屋顶风机； BF4-72 C 式玻璃钢离心风机； FBT35 玻璃钢轴流风机； FT30 C 式玻璃钢轴流风机；玻璃钢 DT多翼式低噪音离心风机；玻璃钢广告风机； PVC4-62 聚氯乙烯塑料离心风机； PP4-62 聚丙烯塑料离心风机； 4-72 不锈钢离心风机； 11-62 不锈钢离心风机。

The actual content includes:Ventilates the way the choice,the gross structure plan determination,the axis design and the examination computation,impeller''s design examines and examines the computation,guide vane''s design calculation,sparse class cover,diffuser and current collector design and choice,shell''s des ign,ventilator muffler design,electrical mac你好nery''s choice and fixed way design,components and so on shaft coupling,key and flange shaping examinations.

本次设计的内容是对JBT62轴流式透风机总体方案以及透风机总体结构设计，机械传动部分设计，对轴流风机工作原理，主要工况参数的意义的掌握。具体内容包孕：透风体式格局的选择，总体结构方案的确定，轴的设计以及校核计算，叶轮的设计以及校核计算，导叶的设计计算，疏流罩、扩散器以及集流器的设计以及选择，壳体的设计，透风机消声装置的设计，电机的选择以及固定体式格局的设计，联轴器、键以及法兰等零件的选型校核。

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。