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。
In order to investigate the dynamic-static interaction and excitation characteristics of multistage axial fan,analyze the effect of different phase arrangement of each stage impeller on the aerodynamic performance and flow field excitation of the fan,the numerical simulation of the five-stage axial fan model was carried out.The phase angle of each stage impeller is changed into 0°,2°,4°and 6°respectively,and the internal flow field and performance parameters of the axial fan as well as the force situation of each stage impeller are obtained.The results show that with the increase of the phase arrangement angle,the impeller blade squeeze the fluid greatly,resulting in the deterioration of the flow behaviours downstream,and the efficiency decreases by about 2.1%.The main characteristic frequency of the force on each stage impeller is the blade frequency(fBPF)and its multifrequency,and the amplitude decreases rapidly with the increase of frequency.Meanwhile,the influence of the phase angle on the force of each stage impeller is also reflected in the flow field performance and fluid energy.The more stable the flow field,the more concentrated the characteristic frequency and the higher the amplitude.
作者
朱程康
李诗徉
叶豪杰
蒋洪涛
吴大转
Cheng-kang Zhu;Shi-yang Li;Hao-jie Ye;Hong-tao Jiang;Da-zhuan Wu(College of Energy Engineering,Zhejiang University;Hangzhou Zhixin Electromechanical Design Co.,Ltd.;Shaoxing Zhixin Electromechanical Technology Co.,Ltd.)
出处
《风机技术》
2024年第5期1-6,共6页
Chinese Journal of Turbomachinery
基金
核技术研发科研项目。
关键词
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
Multi-stage Axial Fan
Phase Angle
Numerical Simulation
Aerodynamic Performance
Flow Excitation
Rotor-stator Interaction
