• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 2007, Vol. 43 ›› Issue (10): 215-220.

• 论文 • 上一篇    下一篇

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空调器室外机上下并联轴流风机系统的气动及声学特性

欧阳华;田杰;吴亚东;郑志明;盐地纯夫   

  1. 上海交通大学机械与动力工程学院;日本大金环境空调技术研究所
  • 发布日期:2007-10-15

AERODYNAMIC AND AEROACOUSTIC STUDY OF COLLATERAL AXIAL FLOW FAN SYSTEM INSIDE OUTDOOR UNIT OF AIR-CONDITIONER

OUYANG Hua;TIAN Jie;WU Yadong;ZHENG Zhiming;SUMIO Shiochi   

  1. School of Mechanical Engineering, Shanghai Jiaotong University DAIKIN Air-conditioning and Environmental Laboratory
  • Published:2007-10-15

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摘要： 采用粒子图像测速技术和计算流体力学方法对空调器室外机上下并联轴流风机系统的气动和声学特性进行研究。研究发现，上下并联轴流风机系统的离散频率噪声的基频和高次谐波频率均不等于任何一个单体叶轮的基频及其高次谐波分量，而是正比于上下叶轮频率差的整数倍。上下叶轮间的流场干涉对于总声压级和噪声频谱特性均无明显影响。采用基于CFD的叶片尾缘涡脱落噪声预测方法计算的总声压级误差小于3 dBA，可满足工程应用要求。

关键词: 空调器, 粒子图像测速, 气动噪声, 轴流风机

Abstract: Both aerodynamic and aeroacoustic performance of collateral axial flow fan system inside outdoor unit of air-conditioner is investigated by particle imaging velocimetry measurement and CFD simulation. The discrete noise frequency is not equal to the upside blade passing frequency, nor the downside rotor, but equal to the integral times of BPF differences between upside and downside rotors. No obvious flow field interaction has been found between upside and downside rotor. Vortex shedding noise prediction model is proved to be effective, with predicted total sound pressure level error less than 3 dBA.

Key words: Aerodynamic noise, Air-conditioner, Axial flow fan, Particle imaging velocimetry

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