期刊,风机技术 2024年卷2期_国家学术搜索

期刊信息/Journal information

风机技术

主　　编：高科光

出版周期：双月刊

国际刊号：1006-8155

电子邮箱：sfjjs@163.com;sfjjs@126.com

电　　话：024-25801521 25800521

邮政编码：110869

地　　址：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。

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采用仿海鸥翼型叶片提升轴流风机气动性能的研究

李跃飞姜怡欣吴立明田晨晔...

1-7页

查看更多>>摘要：为提升轴流风机的气动性能,受到具有良好滑行飞行性能的海鸥翅膀独特的翼型结构的启发,本文研究通过提取海鸥翅膀特定截面位置处的翼型结构应用于轴流风机的叶片设计中,考察了叶片仿生设计对空调器用轴流风机气动性能的影响.首先采用数值计算方法求解定常流动雷诺时均Navier-Stokes方程,对仿海鸥翼型叶片的轴流风机的气动性能及其内部流场进行分析,然后采用大涡模拟方法和FW-H声类比方法对轴流风机的气动噪声进行数值预测.结果表明:在相同的设计转速下,仿海鸥翼型叶片的轴流风机的气动效率提高了3.1%;在相同风量条件下,仿海鸥翼型叶片的轴流风机的噪声相比于原型风机降低了约1.0dB(A).采用仿海鸥翼型叶片,风机叶片表面的静压分布均匀,叶片中段的压力脉动明显减少.同时,在风机进口轮毂处和叶顶区域,流动分离被抑制,叶片尾迹涡脱落引起的气流脉动和气流不均匀性相对减弱,这就有效提升了轴流风机的气动性能.

关键词：

轴流风机海鸥翼型叶片仿生设计流动控制气动性能噪声

原文链接:

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进口导叶对斜流式叶轮级性能调节的数值研究

于家懿张勇李廷宾闻苏平...

8-16页

查看更多>>摘要：针对两种不同翼型的进口导叶,数值研究了导叶在不同开度下对超大流量系数斜流级内部气体流动的影响和调节特性,并预测了进口导叶与斜流叶轮耦合在不同导叶开度下的性能曲线.结果表明,进口导叶能有效扩大调节范围,使斜流压缩机能在更宽的工况范围内运行.导叶开度和翼型对斜流叶轮的气动性能产生影响,开度增大导致气体流动的不均匀性变大,而当开度增大到一定程度时,进口导叶的调节能力变差,对斜流叶轮气动性能产生负面影响.

关键词：

可调进口导叶数值模拟斜流级数值研究斜流叶轮

原文链接:

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Design of a Small Scall Linear Turbine Cascade Test Section

Zheng-xin JiQi-yun LongMing-xu QiChang-mao Yang...

17-23,61页

查看更多>>摘要：Performance improvement of the high-load transonic turbine is the key method of improving the thrust-to-weight ratio or the power density of gas turbine engines.In order to investigate the flow behaviors inside the high load turbine cascades,a linear turbine cascade test section is designed,which enables the Schlieren photography and static pressure measurement along the cascade profile can be conducted.Variable pitch is realized in the test section to achieve different Zweifel coefficients.Due to the capability limitation of the air supplier,the test section is designed to have only 5 blade channels with shortened blade height to achieve high Mach number flow conditions.Numerical investigations were carried out to investigate the wall effect and its in fluences on the flow fields inside the test section.The result indicates that the shape of the connecting part of the test section has a significant influence on the flow similarity among different blade passages.With the proper design,a good repetition flow is achieved between neighbored blade passages.

原文链接:

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压缩空气储能系统用多级离心压缩机进口导叶调节策略研究

王凯轩左志涛梁奇郭文宾...

24-30页

查看更多>>摘要：压缩空气储能系统在储能过程中,储气装置内部压力不断升高,这要求压缩机在较大压比范围内工作.高效变工况是压缩空气储能系统中压缩机的核心要求,为实现这个设计目标需要采取合适的调节方式及其调节策略.可调进口导叶结构简单,可在工作过程中运行,并可利用伺服装置实现自动化,是目前压缩空气储能系统中压缩机最适合的调节方法之一.本文以压缩空气储能系统中某4级离心压缩机为研究对象,建立了一种适用于多级离心压缩机变工况调节的性能预测方法,采用数值模拟得出单级离心压缩机性能曲线,并编写级性能叠加程序获得整机性能曲线.利用最小二乘法将多级离心压缩机性能数据拟合为多项式函数,采用遗传算法建立了以等熵效率为优化目标,进口导叶开度为优化变量,整机出口压力或者流量为约束条件的可调进口导叶调节策略程序.

关键词：

进口导叶调节多级离心压缩机调节策略

原文链接:

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用于催化裂化装置强制循环泵的三元导叶设计方法及性能分析研究

裴林李国君张建茹

31-37页

查看更多>>摘要：强制循环泵是催化裂化装置烟气热量回收系统中重要的水循环动力设备,蜗壳为半球形结构带导叶的LUV型泵是一种广泛应用的强制循环泵,其导叶结构对泵的性能有着至关重要的影响.本文针对强制循环泵二元导叶在不同叶高处的进口叶片安装角与水流角不匹配的问题,发展了采用后盖板和前盖板的叶片中弧线角度分布和叶片厚度分布来构建叶型的三元导叶叶片结构设计方法,并数值研究了导叶后盖板和前盖板处进出口叶片安装角对泵额定工况效率和内部流动特性的影响.结果表明:随着前后盖板叶片进出口安装角中一个变量的增大,额定流量点效率均先增大后减小;设计的三元导叶方案比二元导叶方案在额定工况下的效率提高了0.9%;后盖板附近的叶片安装角与水流角的匹配性对泵的效率起到了更加重要的作用;三元导叶方案在后盖板附近0.1叶高截面上进口水流角与叶片安装角的匹配关系得到改善,此截面上的旋涡区减少,导叶内的能量耗散减小.

关键词：

强制循环泵离心泵数值模拟导叶设计导叶进出口角流动分析

原文链接:

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Numerical Study on Surface Flow Characteristics of Ceramic Matrix Composites with Different Weaving Patterns

Jin-yue ZhangRong-fei YangXing-shuang WuNing Ge...

38-43页

查看更多>>摘要：Ceramic matrix composites(CMCs)are one of the most promising materials in the field of gas turbines,with superior weight and thermal properties.Its surface morphology is different from the traditional casting airfoil components,which mainly comes from different weaving methods and different braided tow thickness.However,few people have studied the influence of surface morphology of ceramic matrix composites(CMCs)on the development of boundary layer and the resulting flow loss.In this paper,TexGen is used to generate different surface morphology structures of ceramic matrix composites(CMCs),and the surface flow characteristics of corresponding CMCs plates are numerically studied.It is found that the slope of the displacement thickness of the woven surface first increases and then decreases in the whole transition interval.Thicker braided tow thickness and denser braiding method will induce earlier flow transition phenomenon and produce greater flow loss;The flow loss on the surface of CMCs plate is mainly composed of the vortex loss in the pit and the boundary layer loss outside the pit,and the boundary layer loss is dominant.The weaving methods has a greater influence on the flow state and flow loss of the boundary layer.

原文链接:

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Root Cause Investigation of a Non-physical Solution of a Time Domain Harmonic Balance Solver

Sen ZhangDing-xi Wang

44-50页

查看更多>>摘要：The time domain harmonic balance method is an attractive reduced order method of analyzing unsteady flow for turbomachines.However,the method can admit non-physical solutions.Non-physical solutions were encountered from a three-blade-row compressor configuration in a time domain harmonic balance analysis.This paper aims to investigate the root cause of the non-physical solutions.The investigation involves several strategies,which include increasing the number of harmonics,increasing the number of time instants,including scattered modes,including the rotor-rotor interaction,and the use of a new method-the approximate time domain nonlinear harmonic method.Numerical analyses pertinent to each strategy are presented to reveal the root cause of the non-physical solution.It is found that the nonlinear interaction of unsteady flow components with different fundamental frequencies is the cause of the non-physical solution.The non-physical solution can be eliminated by incorporating extra scattered modes or using the approximate time domain nonlinear harmonic method.

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Flow Resistance Characteristics of Rotary Ribbed Channels

Ru-quan YouYun-teng XuHai-wang Li

51-61页

查看更多>>摘要：With the development of aero-engines,the turbine inlet temperature continues to rise.In order to ensure the safety and reliability of the turbine blades,cooling structures must be set inside turbine blades to cool them.Heat transfer coefficient and flow resistance are the key parameters to measure the cooling characteristics of internal cooling structures.In this paper,the characteristics of flow resistance in a rotating ribbed channel is presented numerical simulation under different rib spacings,rib angles,and thermal boundary conditions.The results show that,separation and reattachment of fluid between ribs is the key effect of rib spacing on flow resistance.The flow resistance is small when the rib spacing is small,because it's difficult for the fluid to form reattachment between the ribs.With the increase of rib spacing,the reattachment phenomenon is more obvious and the flow resistance increases accordingly.In general,p:e=10 channel has the maximum flow resistance.Secondary flow caused by the ribs is the key factor affecting the flow resistance characteristics with different rib angles.The secondary flow interacts with the main flow and causes flow loss through mixing,thus affecting the flow resistance of the channel.Under static condition,the flow resistance of 60° ribbed channel is the largest.The flow resistance of channel was affected by the temperature rise ratio also.And with the increase of the Ro,the temperature rise ratio has a more obvious effect on the flow resistance of the ribbed channel.When Ro=0.45,the flow resistance of the channel with a temperature rise ratio of 0.4 is 2.4 times that of the channel without temperature rise,while when Ro=0.3,it is 1.6 times,and when Ro=0.15,it is 1.2 times.

原文链接:

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离心透平转子的动力学分析与试验

申迎峰袁玮玮袁龙健刘释杰...

62-66页

查看更多>>摘要：针对某离心式透平膨胀机转子,采用MADYN2000进行动力学建模,对高速轴进行了无阻尼临界转速分析与临界转速图谱分析,选定了轴承刚度范围.确定轴承结构后校验了轴承的动态特性,该轴系的阻尼临界转速满足API617设计要求,并用不平衡响应计算为叶顶密封间隙设计提供了依据.在机组试验过程中,可重复观察到显著的跨临界现象,并对试验期间出现的油膜涡动情况进行了剖析.达到额定转速后的轴承振动趋于良好,经停机拆解未发现叶顶密封有磨损痕迹.试验结果表明,离心透平转子的临界转速和轴承温度计算与试验结果基本吻合,转子动力学分析在新机组的开发过程中具有良好的指导意义.

关键词：

离心透平转子动力学分析试验

原文链接:

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第六届中国国际透平机械学术会会议通知

66页

原文链接:

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