应用电子表格进行轴流通风机优化气动设计

介绍了应用最优化理论进行轴流通风机优化设计的方法，为简化设计计算及方便于实际应用．采用了电子表格进行轴流通风机的优化气动设计与计算，与采用轴流通风机优化气动设计的计算机程序所得到的计算结果进行了对比，并将该方法应用于设计一台高温消防排烟风机。     

立式矿井轴流通风机剖析

采用自由涡流设计法和正命题解法，剖析了P R S级的6．1m大型立式矿井轴流通风机气动设计特点。     

满足多个工况要求的轴流通风机设计参数的确定

提出了一套完整的计算单叶轮轴流通风机设计点附近性能曲线的方法，此方法只根据轴流通风机设计点的参数，就可以计算出由不同设计方法、不同轮毂比以及不同叶型叶片设计的轴流通风机性能曲线，将其应用到需要满足多个工况要求的轴流通风机设计参数的确定中，与实际测试结果对比，效果良好。     

轴流通风机气动设计的判据及其应用

在文献[1]、[2]的基础上，归纳总结出轴流通风机气动设计的6项判据，并举例说明了它们的应用。正确运用这些判据，不仅对筛选气动设计方案，而且对进一步验证设计计算结果的合理性与可行性均有着重要的指导作用。     

2K58轴流通风机的技术改造

介绍了２Ｋ５８Ｎｏ２８轴流通风机技术改造的内容，设计方案，强度计算与试验，安装后又进行了效果检验，达到了提高风量，风压的目的。阐述了航空技术在气动设计方面于煤矿风机技术改造上的成功应用。     

国外6．1m大型矿用轴流通风机的分析

概要介绍了国外6．1m矿用轴流通风机的结构，着重分析了该风机气动设计特点。     

矿用轴流通风机叶片三维几何模型反求重构

通风机叶片形状是影响通风机气动性能的关键因素,为了引进和吸收先进的矿用轴流通风机叶片设计技术,采用反求技术对其三维几何模型进行反求重构.首先,根据通风机叶片设计特点规划测量路径,应用三坐标测量机(CMM)对矿用轴流通风机叶片表面曲面进行测量,提取通风机叶片表面曲面的三维点云数据.然后,在反求软件UG中,利用最小二乘拟合曲线检查法对所提取的点云数据进行异常点的剔除,运用弦高-夹角综合法进行点云数据的精简.最后,采用非均匀有理B样条(NURBS)对各截面数据点进行曲线拟合,并使用通过曲线组生成曲面的方法重构了矿用轴流通风机叶片的三维几何模型,这对矿用轴流通风机计算流体力学模拟和叶片优化设计具有重要意义.     

完全可逆地铁轴流通风机气动设计综述

在广泛查阅国内外资料的基础上,从气动设计角度出发,对地铁风机的气动设计要求、完全可逆风机专用翼型、可逆风机流型的优化设计以及目前在可逆轴流通风机设计上新进展进行了较全面的分析和总结,对可逆轴流通风机下一步的研究问题提出了一些建议。     

大型电站子午加速轴流通风机逆向工程设计

本文研究对象是某大型火电站国外进口的子午加速轴流引风机。首先应用光学j维扫描仪测量系统对叶片严重磨损的轴流通风机叶轮进行了扫描测绘;然后采用逆向工程方法,建立了原型（磨损）轴流通风机叶片的三维曲面模型;依据曲面模型及叶片实际的磨损情况,提取和推断出叶片的原始设计思想和参数,并对叶片叶型进行了重新设计,建立了风机叶轮的完整三维实体模型;最后,对重新造型的轴流通风机的内部流场进行数值模拟,预测通风机的气动性能并得到了轴流通风机的性能曲线。计算结果表明,在较宽的流量范围内,轴流通风机内的流动稳定,效率较高,气动性能完全达到设计要求。     

大风量高效低噪喷雾轴流通风机的优化设计

将最优化方法应用于喷雾轴流通风机的气动设计及其结构参数的选择计算,应用电子表格进行风机叶轮流型的优化设计和最佳结构参数的确定.按最优化方法设计了JYPW-1型大风量喷雾轴流通风机,并给出了该风机的流量、全压、效率、噪声等气动性能实测数据与国内同类型风机的性能对比.     

S型叶片可逆式轴流风机的全三维优化设计

可逆风机在正向与反向送风时,都希望具有良好的气动性能。由于几何形状完全对称,S型叶片是可逆风机中比较理想的叶片。以NACA4数字系列叶型的前半部分为雏形,构造出气动性能良好的S型叶片。用三维雷诺平均Navier Stokes方程的计算流体力学方法,将叶型参数、扭转角和安装角作为设计参数,应用正交优化方法,对S型叶片的可逆式轴流风机通流部分进行优化设计,在满足风量、风压要求的前提下,获得最高的流动效率,取得了良好的设计效果。     

A mass addition approach to the bypass turbomachine through flow inverse design problem

In the design of a low bypass ratio fan stage, this paper links the through flow inverse design problems of the fan rotor, the core channel fan stator and the bypass channel fan stator together, as an organic whole, with the fan splitter aerodynamic design problem. It forms thus a unified through flow inverse problem for two-channel turbomachines. While an overall quasi-radial-equilibrium of the streamlines is iteratively achieved among five parts — the fan rotor, the core channel fan stator, the bypass channel fan stator, the fan splitter and the position of the fan splitter, the blading processes for one fan blade, two fan vanes and one fan splitter ring are performed. This method designs in one pass a fan stage and a splitter with a precise bypass ratio. Its primary and key approach scheme is the introduction of a mass addition flow half way through the through flow streamline development. This scheme can serve as a new feature which can be inserted into those existing through flow programs. When subtracting a mass flow after adding a mass flow, alternatively, this scheme can also be used to treat the inverse design problem of a fan/compressor rotor blade with part-span shrouds. This paper was presented at the 9^th Asian International Conference on Fluid Machinery (AICFM9), Jeju, Korea, October 16–19, 2007.     

板型及机翼型对旋轴流通风机气动性能测试及比较

采用模型性能试验方法,对板型及机翼型叶片的对旋轴流通风机的气动性能进行了比较,通过测量这两种叶型的风机在不同叶片安装角下的流量、全压及轴功率,得到了叶片型线及安装角对风机气动性能的影响规律。试验结果表明机翼型叶片在全压效率、稳定运行范围及高效运行范围比相应的板型叶片具有优越性;在设计工况附近,机翼型风机的第一级叶轮安装角对气动性能的影响较大,而板型风机的第二级叶轮安装角对气动性能影响较大。     

轴流风机叶片紊流噪声模型及其特性研究

根据风机叶片紊流噪声的特点，运用片条理论、非线性气动力理论，分析了作用在叶片上的力，推导了叶元体与气流相互作用诱发叶元体尾缘涡脱落引起的紊流噪声模型。对此噪声的频域特性及各影响因素进行定性分析，得到与各因素相对应的紊流噪声预测值。结合风机旋转噪声模型的预测值，实现风机噪声值的预测，实验验证了模型的正确性。     

前弯前掠低噪声纺织轴流通风机的优化设计

从提高纺织轴流通风机效率、降低风机气动噪声的目标出发,采用叶片前弯前掠技术,在叶轮叶片的重心线上各基元截面采用高效翼型的最优化流型成型。应用叶片前弯前掠和最优流型相结合的技术研制开发了JYFZ新型纺织轴流通风机,并与目前纺织行业应用量较大的FZ40(35)-11/12型纺织轴流通风机进行了对比性能测试。结果表明,JYFZ型纺织轴流风机具有效率高、噪声低、质量轻、结构简单及工作区域宽广等特点。     

An optimal design for axial-flow fan blade: theoretical and experimental studies

The technique of inverse design problem (IDP) for optimizing the three-dimensional shape of an axial-flow fan blade based on the desired airflow rate is presented in this work. The desired volume flow rate of air can be obtained from the airflow rate of the existing axialflow fan by multiplying it with a constant which is greater than unity. The geometry of the redesigned fan blade is generated using numerous design variables, which enables the shape of the fan blade to be constructed completely; thus the technique of parameter estimation for the inverse design problem can be used in this study. Results show that with the redesigned optimal fan blade, the airflow rate of fan can be increased, thereby improving the performance of the axial-flow fan. Finally, to verify the validity of this work, the prototypes of the original and optimal axial-flow fan blades are fabricated and fan performance tests are conducted with these blades on the basis of the AMCA-210-99 standard. The algorithm used in the present study can be applied to the blade design problem in any propulsion and power systems.     

Aerodynamic design and optimization of a high-loaded axial fan stage using a curvature control method

This study designs and optimizes a high-loaded transonic fan stage using a curvature control method. A fan stage with a total pressure ratio of 2.49 and adiabatic efficiency of over 87 % at the design point is obtained after 3D optimizations. The geometric curvature of the blade passage has important driving and adjusting effects on the mainstream and on the flow in the boundary layer. The reasonable optimization of camber line curvature can weaken the radial secondary flow on the blade surface and decrease shock losses effectively. It can also postpone or suppress boundary layer separation by reorganizing aerodynamic load. Hence, secondary flow losses are reduced, and the overall stall margin is expanded. This method features high precision, high operability, and short design cycle, hence providing highloaded fans/compressors with new freedom to improve design ability and offering new possibility to design system development.

     

新型低噪声通风机的无喘振特性

阐述了新型低噪声通风机的设计计算方法、喘振工况产生和消除条件和零流量无喘振工况的创新特点