首页期刊导航|风机技术
期刊信息/Journal information
风机技术
风机技术

高科光

双月刊

1006-8155

sfjjs@163.com;sfjjs@126.com

024-25801521 25800521

110869

沈阳市经济技术开发区开发大路16号甲

风机技术/Journal Compressor, Blower & Fan Technology北大核心CSTPCD
查看更多>>本刊是我国风机行业唯一的专业技术期刊，中国科技核心期刊，在通用机械行业及其相关领域有着广泛的影响。本刊在行业的唯一性和技术性、实用性、权威性使其发行已达全行业的各个位置。
正式出版
收录年代

    基于CFD的多级轴流风机动静干涉及激励特性研究

    朱程康李诗徉叶豪杰蒋洪涛...
    1-6页
    查看更多>>摘要：为了探究多级轴流风机的动静干涉及激励特性,分析每级叶轮不同相位排布对风机气动性能和流场激励的影响,对五级一体化轴流风机模型进行数值模拟.分别改变每级叶轮的相位排布角度为0°、2°、4°、6°,获得轴流风机内部流场和性能参数以及每级叶轮受力情况.结果表明:随着排布角度增大,叶轮对流体挤压增大,后半段流场流动恶化,效率约下降2.1%.每级叶轮受力的主要特征频率为叶频(fBPF)及其倍频,且幅值随频率增加而快速减小.同时,排布角度对每级叶轮受力的影响也体现在流场性能和流体能量上,越稳定的流场,其特征频率越集中且振幅较高.

    多级轴流风机相位角度数值计算气动性能流动激励动静干涉

      原文链接:
    • 万方数据
    • 维普

    Identification of Backflow Vortex Instability in Rocket Engine Inducers

    Luca d'Agostino
    7-18页
    查看更多>>摘要：Bayesian estimation is applied to the analysis of backflow vortex instabilities in typical three-and four-bladed liquid propellant rocket(LPR)engine inducers.The flow in the impeller eye is modeled as a set of equally intense and evenly spaced 2D axial vortices,located at the same radial distance from the axis and rotating at a fraction of the impeller speed.The circle theorem and the Bernoulli's equation are used to predict the flow pressure in terms of the vortex number,intensity,rotational speed,and radial position.The theoretical spectra so obtained are frequency broadened to mimic the dispersion of the experimental data and parametrically fitted to the measured pressure spectra by maximum likelihood estimation with equal and independent Gaussian errors.The method is applied to three inducers,tested in water at room temperature and different loads and cavitation conditions.It successfully characterizes backflow instabilities using the signals of a single pressure transducer flush-mounted on the casing of the impeller eye,effectively by-passing the aliasing and data acquisition/reduction complexities of traditional multiple-sensor cross-correlation methods.The identification returns the estimates of the model parameters and their standard errors,providing the information necessary for assessing the accuracy and statistical significance of the results.The flowrate is found to be the major factor affecting the backflow vortex instability,which,on the other hand,is rather insensitive to the occurrence of cavitation.The results are consistent with the data reported in the literature,as well as with those generated by the auxiliary models specifically developed for initializing the maximum likelihood searches and supporting the identification procedure.
      原文链接:
    • 万方数据
    • 维普

    带泄漏通道的半开式离心叶轮轴向力推力数值模拟分析

    张傲刁安娜申迎峰迟志男...
    19-24页
    查看更多>>摘要：离心叶轮轴向力的计算是大型、高速离心压缩机设计的关键技术之一.本文以某0.17流量系数离心压缩机半开式叶轮为研究对象,采用数值模拟的方法对该叶轮在设计工况、变工况和变关键几何尺寸条件下的轴向力展开了计算和模拟分析.结果表明:半开式离心叶轮轴向力一维计算方法与本文所采用的数值模拟方法相比,两者误差为5.8%;轴向力随流量的增加呈现先增加后减小的趋势;当叶轮的转速增加时,叶轮轴向力在全流量范围内增加;当进气温度增加时,轴向力呈现线性下降趋势;当进气压力增加时,轴向力呈现线性增长趋势;当密封齿数增加时,叶轮轴向力线性增大,泄漏量逐渐减小.当密封轴颈增加时,叶轮轴向力先减小至平衡状态后再反向继续增加,泄漏量成倍数增长趋势.

    离心压缩机半开式叶轮泄漏通道轴向力CFD数值模拟

      原文链接:
    • 万方数据
    • 维普

    Numerical Study of Co-flow Jet Control on Corner Separation in Compressor Cascade

    Rui-ling XuTong-xi LiZhi-heng WangGuang Xi...
    25-33页
    查看更多>>摘要：The design objectives of modern aircraft engines include high load capacity,efficiency,and stability.With increasing loads,the phenomenon of corner separation in compressors intensifies,affecting engine performance and stability.Therefore,the adoption of appropriate flow control technology holds significant academic and engineering significance.This study employs the Reynolds-averaged Navier-Stokes(RANS)method to investigate the effects and mechanisms of active/passive Co-flow Jet(CFJ)control,implemented by introducing full-height and partial-height jet slots between the suction surface and end wall of a compressor cascade.The results indicate that passive CFJ control significantly reduces the impact of corner separation at small incidence,with partial-height control further enhancing the effectiveness.The introduction of active CFJ enables separation control at large incidence,improving blade performance under different operating conditions.Active control achieves this by reducing the scale of corner separation vortices,effectively reducing the size of the separation region and enhancing blade performance.
      原文链接:
    • 万方数据
    • 维普

    Design Optimization of Outlet Temperature Distribution of Hydrogen Micromixing Diffusion Combustor Based on Micro-turbojet Engine

    Da MoYu-zhen LinXiao HanFeng-ming Wang...
    34-38页
    查看更多>>摘要：This paper focuses on the optimization of the outlet temperature field of a hydrogen micromixing diffusion combustor for a micro-turbojet engine with a thrust of 20kgf.The joint simulation optimization platform was established combining Workbench and UG and the multi-parameter driven optimization design process was developed.The surrogate models and genetic algorithms were employed to investigate the influences of key parameters on the hotspot temperature at the combustor exit.It was found that smaller diameters of the dilution holes and positions further from the exit lead to lower hotspot temperatures.Additionally,an optimal solution for achieving a uniform temperature distribution at the combustor outlet was obtained.This solution involves a single row of dilution holes on both the inner and outer walls of the flame tube,arranged in an alternating axial and angular pattern.Through aerothermal process analysis,it was determined that the outlet temperature distribution coefficient(OTDF)of the combustion chamber is below 0.2.Meanwhile,the axial dimension of the flame is short,approximately one-third of the flame tube length.The conclusions derived from this study provide important guidance for the design of hydrogen micromix diffusion combustor.
      原文链接:
    • 万方数据

    超临界二氧化碳轴流透平冷却系统流量和温度的影响研究

    唐国庆但光局霍文浩孙冬婷...
    39-47页
    查看更多>>摘要：超临界二氧化碳(Supercritical Carbon Dioxide,SCO2)轴流透平引入外部低温SCO2作为冷却系统冷却气,对干气密封和转子系统进行冷却,确保干气密封运行温度在200℃以内.针对某小功率SCO2轴流透平冷却系统建立了包括冷却流体域、主流流体域和固体域耦合的整机计算模型,对比分析了不同冷却气流量和温度对干气密封和转子系统的冷却效果和透平效率的影响,在此基础上开展了耦合温度场和压力场的透平整机强度计算.结果表明:引入外部低温SCO2能有效冷却干气密封在内的整个转子系统;随着冷却气流量的增加,透平效率和转子系统温度逐渐降低,冷却气流量越小,相同冷却气流量变化引起的效率和温度的变化越大;随着冷却气温度的增加,透平效率基本不变,转子系统温度成线性增加.当冷却气温度为120℃,流量为0.04kg/s时,透平转子系统冷却效果可满足要求,此时干气密封工作温度为194℃.强度评估结果表明:透平整机转子部件最大等效应力536MPa,位于涡轮叶片根部,各零部件应力均小于材料屈服强度,安全裕度最小为1.57,满足长期安全可靠运行需求.

    超临界二氧化碳轴流透平冷却系统传热特性温度分布

      原文链接:
    • 万方数据
    • 维普

    基于混合计算声学法的高速离心风机气动噪声特性研究

    李志翔董烈祎王东华率志君...
    48-58页
    查看更多>>摘要：本文基于分离涡模拟和声学有限元相结合的混合方法对某船用高速离心风机进行气动噪声理论分析,同时结合试验测试研究,验证了理论分析的合理性.研究表明,叶轮旋转区域声源为气动噪声主要来源,叶频处的气动噪声指向性特征最明显,对离心风机气动噪声贡献量最大.叶轮旋转区域的面声源为离散单音噪声的主要来源,蜗壳和管道静止区域体声源主要贡献了低频段和宽频噪声.气动噪声数值模拟与试验值吻合较好,证明了理论方法的准确性.此项理论方法研究为高速离心风机空气动力学噪声预测提供了有效策略,可为离心风机结构低噪声优化设计提供依据.

    离心风机气动噪声混合计算声学数值模拟试验研究

      原文链接:
    • 万方数据
    • 维普

    基于轴对称喷流的背景纹影测量方法对比研究

    魏祥智史经纬周莉王占学...
    59-62页
    查看更多>>摘要：背景纹影(BOS)是一种基于光线折射的非接触式流场测量技术,可以定量获得流场的密度信息.与层析技术结合的背景纹影层析技术(BOST)能够实现三维密度场重建.本文针对轴对称喷管,采用BOS方法测量获得了超声速喷流的二维密度分布,在轴对称假设下采用BOST方法重构了其三维密度场并与二维结果进行对比.研究表明,二维BOS将视线积分的流场信息进行平均,忽略了沿光路方向流场结构变化所带来的影响,BOST模型中包含多个角度的投影信息,更准确地重建了喷流的三维结构和高空间分辨率的密度场.

    背景纹影背景纹影层析轴对称喷流定量测量密度场三维重建

      原文链接:
    • 万方数据
    • 维普

    Development of a Pipeline Pulsating Pressure Excitation Device and System

    Yong SuWu-qi Gong
    63-72页
    查看更多>>摘要：The high turbulence of unstable combustion in the working process of liquid rocket engine will cause periodic pressure pulsation.Therefore,a pressure pulsation device that is easy to reuse,broadband,suited for poisonous media,and high pressure is designed and produced.Numerical and experimental studies show that the pulsator produces stable pressure waveforms at different flow rates,pressures,and frequencies,while the pressure waveform amplitude at the excitation frequency is larger.The pressure waveform amplitude increases exponentially with the flow rate and with smaller gaps and linear pressure increasing.The pressure waveform amplitude varies greatly at different frequencies along the pipeline.As the frequency increases,the pressure waveform amplitude of the excitation increases first and then decreases.The pressure waveform amplitude at low frequencies changes little along the pipeline.The pressure waveform amplitude at medium frequencies readily couples to the pipeline flow field and increases its value.The pressure waveform amplitude at high frequencies attenuates along the pipeline,where attenuation increases with frequency.The ability of the pulsator to provide stable excitation and high pressure is verified through normal and high pressure tests in different pipeline systems.
      原文链接:
    • 万方数据
    • 维普

    并联压缩机系统变工况运行负荷分配研究

    罗金平黄景聪田盛王亮...
    73-77页
    查看更多>>摘要：为实现变工况下并联压缩机系统的高效稳定运行,本文建立了并联压缩机及负荷管网系统模型,定义了系统运行效率,并以此为指标对并联压缩机系统运行状态优劣进行定量评价.以实现并联压缩机系统最高运行效率为目标,提出了该系统变工况运行状态下的负荷分配策略.通过运行实例分析,研究了变工况条件下并联压缩机组系统效率变化规律与最优调控策略.本文所提出的调控策略为拓展并联压缩机系统高效运行工况范围,提升系统运行效率提供了理论与技术支撑.

    并联压缩机系统变工况运行负荷分配

      原文链接:
    • 万方数据
    • 维普