供热管道泄漏流场/声源特性及其变化规律  

Characteristics and variation of flowing/acoustic source of leaking heating pipeline

作　　者：张曼 张立申[2] 王随林 李仲博[2] 王海鸿[2] 张威 穆连波 ZHANG Man;ZHANG Li-shen;WANG Sui-lin;LI Zhong-bo;WANG Hai-hong;ZHANG Wei;MU Lian-bo(School of Environment and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing District Heating Group,Beijing 100022,China)

机构地区：[1]北京建筑大学环境与能源工程学院,北京100044 [2]北京市热力集团有限责任公司,北京100022

出　　处：《消防科学与技术》2021年第3期312-318,共7页Fire Science and Technology

基　　金：北京学者计划资助项目(2015NO.022);北京市自然科学基金资助项目(3194046);北京市热力集团合作项目(KY191007)。

摘　　要：以供热管道泄漏喷射为研究对象,建立管道泄漏致噪的计算流体力学CFD/计算声学CA混合数值模型,采用Fluent与Virtual. Lab Acoustics耦合数值模拟,分析管内压力、温度等因素对热水管道泄漏流场及声源特性的影响。结果表明,泄漏源附近流场呈非对称扇形结构,热水管道泄漏声能主要集中在低频段(0~20 Hz),平均声压级随管内压力的升高而增大,随水温的升高而有所降低。模拟结果与文献实验结果相对偏差小于7.99%,可为基于声波法的供热管道泄漏检测提供理论基础。Taking heating pipeline leakage as the object,the interior flow and acoustic source characteristics of pipe leakage were solved by coupling CFD with Computational Acoustics(CA).The influence of media pressure,temperature on the interior flow and acoustic source characteristics were analyzed using Fluent and Virtual.Lab Acoustics.The results showed that the flowing field near the leakage source presents an asymmetric fan-shaped structure.The leakage sound energy of the hot water pipeline is mainly concentrated in the low frequency band(0~20 Hz).The average sound pressure level increases with the increase of medium pressure,while decreases with the increase of the water temperature.The deviation between simulation results the experimental results in the literature is below 7.99%.This study provides a theoretical basis for improving the detection technology of heating pipeline leakage based on acoustic wave method.

关 键 词：热水管道 泄漏声源 CFD/CA 流场特性 声源特性 

分 类 号：X956[环境科学与工程—安全科学] TU995.3[建筑科学—供热、供燃气、通风及空调工程]