Study on Countermeasures for High Level Sound Generated in Boilerand Heat Exchanger

锅炉及换热器高噪声对策研究

• 批准号: 22560226
• 负责人: ISHIHARA Kunihiko
• 金额: $ 2.5万
• 依托单位: Tokushima Bunri University (2012)The University of Tokushima (2010-2011)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22560226/
• 关键词: ボイラ; 熱交換器; 気柱共鳴; 空力自励音; ストロハル数; 音響減衰; カルマン渦; ダクト音場; 共鳴周波数; 共鳴モード; ゴム板; 固有振動数; 音響減衰比; 管群; 自励音発生流速

Karman vortex occurs when the gas passes through the duct with tube bank of the heat exchangers, such as a gas heater and a boiler, and the very high level noise called “Self-Sustained Tones” occurs due to the interference of the vortex and the sound field in the duct. In general, baffle plates are used to suppress the self-sustained tone. However, it is difficult to use them effectively, because insert condition is vague. Then, rubber boards as flexible walls are installed in both sides of the duct to suppress the Self-Sustained Tones. Because we thought that the resonance mode of the duct perpendicular direction to the flow may be suppressed by rubber boards vibrating, when Self-Sustained Tones occurred. The experiment was carried out to examine the suppression effect of the rubber boards installed. As a result, the suppression effect appeared at a certain condition. The purpose of this study is to clarify” Effectiveness of the rubber sheet for Self-Sustained Tones”

当气体与热交换器的管库（例如气加热器和锅炉）穿过管道时，会发生Karman Vortex，并且由于涡流的干扰和管道中的声场的干扰，出现了称为“自我维持的音调”的非常高的噪声。通常，挡板板用于抑制自我维持的音调。但是，由于插入条件是投票，因此很难有效使用它们。然后，将作为柔性墙的橡胶板安装在管道的两侧，以抑制自我维持的音调。因为我们认为当发生自我维持的音调时，橡胶板振动可能会抑制垂直于流动的导管的共振模式。进行了实验以检查安装橡胶板的抑制作用。结果，抑制作用出现在一定条件下。这项研究的目的是阐明“橡皮纸对自我维持的音调的有效性”

项目成果

ボイラ管群で発生する空力自励音のバッフル板による対策メカニズムに関する研究

隔板消除锅炉管组气动自激噪声的机理研究

• 发表时间: 2012
• 期刊: 日本機械学会論文集(C編)
• 作者: Ikeda;T.;Takashima;M.;Harata;Y;石原国彦,為平泰祐,辻政範
• 通讯作者: 石原国彦,為平泰祐,辻政範

Study on a Countermeasure of Self-Sustained Tone by a Bgffle Plate in Boiler Tube Banks with Cavity

空腔锅炉管束中挡板板自续音对策研究

• 发表时间: 2011
• 作者: Taisuke Tamehura;Kunihiko Ishihara
• 通讯作者: Kunihiko Ishihara

S Study on a Countermeasure of Self-Sustained Tone by a Baffle Plate in Boiler Tube Banks with Cavity

空腔锅炉管束折流板自续音对策研究

• 发表时间: 2011
• 作者: Tamehira Taisuke;Kunihiko Ishihara;Hino Junichi and Tsuji Masanori
• 通讯作者: Hino Junichi and Tsuji Masanori

Study on aCountermeasure of Self-Sustained Tones in a Boiler Tube Bank

锅炉管束自持音对策研究

• 发表时间: 2011
• 作者: Ikeda;T;Takahashi Takeshi and KunihikoIshihara
• 通讯作者: Takahashi Takeshi and KunihikoIshihara

ボイラ管群における空力自励音の対策法に関する研究-ゴム板部設置位置の自励音抑制に与える影響

锅炉管组气动自激噪声对策研究——橡胶板安装位置对抑制自激噪声的影响

• 发表时间: 2010
• 作者: 高橋武史;石原国彦
• 通讯作者: 石原国彦