CAJ | 학술논문

通过传声器搭建的压力脉动测试系统，测量了某多翼离心风机蜗壳壁面一周的压力脉动值及风机进口的噪声频谱，并结合FLUENT计算分析风机内部的流场，分析得出所研究多翼风机的噪声主要以涡流噪声为主，同时旋转噪声也是不容忽视的一部分，最后为该多翼风机提出了降噪的改进方案。
통과전성기탑건적압력맥동측시계통，측량료모다익리심풍궤와각벽면일주적압력맥동치급풍궤진구적조성빈보，병결합FLUENT계산분석풍궤내부적류장，분석득출소연구다익풍궤적조성주요이와류조성위주，동시선전조성야시불용홀시적일부분，최후위해다익풍궤제출료강조적개진방안。
Pressure fluctuations of casing surface and fan inlet noise spectrum for a multi-blade centrifugal fan are measured based on pressure fluctuations testing system established by microphone. The analysis result shows that vortex noise is an important part of fan noise for this fan while rotating noise is also noticeable combined with CFD simulation software FLUENT. Finally the improving scheme for reducing noise of multi-stage fan is pointed out.