盘管构型HQ管降噪特性及流动结构研究
Study on noise reduction performances and flow structures in a bended HQ tube
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- 引用格式:
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黄腾龙,周国龙,汪新宇,陈智哲,潘彪,刘良水,张家忠.盘管构型HQ管降噪特性及流动结构研究[J].天然气与石油,2023,41(6):28-37.doi:10.3969/j.issn.1006-5539.2023.06.005
HUANG Tenglong, ZHOU Guolong, WANG Xinyu, CHEN Zhizhe, PAN Biao, LIU Liangshui, ZHANG Jiazhon.Study on noise reduction performances and flow structures in a bended HQ tube[J].Natural Gas and Oil,2023,41(6):28-37.doi:10.3969/j.issn.1006-5539.2023.06.005
- DOI:
- 10.3969/j.issn.1006-5539.2023.06.005
- 作者:
- 黄腾龙1 周国龙1 汪新宇1 陈智哲1 潘 彪2 刘良水3 张家忠1
HUANG Tenglong1, ZHOU Guolong1, WANG Xinyu1, CHEN Zhizhe1, PAN Biao2, LIU Liangshui3, ZHANG Jiazhon
- 作者单位:
- 1. 西安交通大学能源与动力工程学院, 陕西 西安 710049; 2. 国家管网集团北京管道有限公司, 北京 100101; 3. 北京嘉尔德科技有限公司, 北京 100088
1. School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi, 710049, China; 2. Beijing Pipeline Co., Ltd. of National Pipe Networks, Beijing, 100101, China; 3. Beijing Takebest Technology Co., Ltd., Beijing, 100088, China
- 关键词:
- HQ管;降噪;有限时间李雅普诺夫指数
HQ tubes; Noise reduction; Finitetime Lyapunov exponent
- 摘要:
在赫歇尔—昆克(Herschel-Quincke,HQ)管降噪理论基础上,提出了采用盘管构型降低HQ管占用空间的方法,并分析了管道降噪性能及相应流动的Lagrangian拟序结构。首先,针对给定模型,结合声模态理论和数值模拟,研究了HQ管管长以及管道宽度对降噪性能的影响规律,发现对于低频噪声,HQ管管道须达到一定的长度要求,并基于此确定了在给定模型条件下的HQ管参数；然后,利用此参数设计了盘管以及直管形式的3种HQ管结构,并进行了对比分析,结果表明，在长度一定时,直管与盘管平均噪声传递损失仅相差0.05 dB,而有限空间下直管平均噪声传递损失则由于管长降低而低于盘管0.41 dB；最后,结合有限时间李雅普诺夫指数(Finite-time Lyapunov exponent，FTLE)对HQ管中的流动结构进行了分析,发现了盘管条件下侧壁存在的分离区,通过FTLE识别出分离区的边界并相应调整了管道宽度,降噪效果恢复到与直管相当水平。综上,所提出的HQ管进行盘绕既可以有效地降低HQ管占用空间,又能保证HQ管降噪性能。盘管对流动结构产生的影响,可以在保证降噪效果的前提下进一步通过HQ管宽度进行调控。
Bended HQ tubes have been introduced to minimize the size of these noise-reducing structures, and the tubes-noise-reducing capabilities and Lagrangian Coherant structures are analyzed. Firstly, the impact of tube length and width on noise reduction is elucidated using acoustic mode theories with numerical simulations. This indicates a necessary length requirement to effectively mitigate low-frequency noise. Based on this, the HQ tube parameters under the given model are determined. Then, using these parameters, three types of HQ tube structures in the form of bended tubes and original tubes were designed and a comparative analysis is conducted. The results show that when the length is fixed, the average noise transmission loss of original HQ tubes and bended HQ tubes differs by only 0.05 dB, whereas in a limited space, the average noise transmission loss of original tubes is 0.41 dB lower than that of bended tubes due to the reduction in tube length. Lastly, FTLE is employed to investigate the flow structures inside the tubes. Separation zones near the bends are discovered and their boundaries are delineated using FTLE. Consequently, the width of the HQ tubes is adjusted, restoring the noise reduction performance to the level of the original HQ tubes. In conclusion, the bended HQ tube presents an effective solution for noise reduction in limited spaces. The impact of bended tubes on flow structures can be regulated by changing the width of the HQ tubes, while ensuring its noise reduction effect.
