摘要
针对炉内声波吹灰换热技术存在调控死角问题,研究管阵列结构分布对管道周围声流与传热性质的影响。基于极限速度法计算单管声流分布,得到管外声流速度与激励速度和频率的关系,分析声流对努塞特数的影响;构造普通链和拓扑链管阵列模型,分析两种管阵列模型中的声流与传热特性。结果表明:低频高激励下声流速度大,换热效果增强;高频低激励下声流速度小,换热效果降低;拓扑链特征频率下,声能量在拓扑边界处产生声能量极化;声流空间分布大小与换热系数呈正相关,声流区域受限,换热效果降低;声流区域扩张,换热效果增强。该研究为声波换热在炉内管阵列中的技术优化奠定理论基础,具有重要的理论价值与工程意义。
Aiming at the problem of control dead zones in the in-furnace acoustic soot blowing and heat transfer technology,we study the tube array structural distribution effect on the acoustic streaming and heat transfer properties around the tube.Based on the limit velocity method,we calculate the acoustic streaming distribution around a single tube,and obtain the relationship between the acoustic streaming velocity and the acoustic parameters(excitation velocity and the frequency),and then analyze the acoustic streaming effect on the Nusselt number.Ordinary chain and topological chain tube array models were constructed to analyze the acoustic streaming and heat transfer characteristics.The results show that:under low frequency and high excitation,the acoustic streaming velocity is high,and the heat transfer effect is enhanced;under high frequency and low excitation,the acoustic streaming velocity is low,and the heat transfer effect is reduced;at the topological chain characteristic frequency,acoustic energy polarization occurs at the topological boundary;the acoustic streaming spatial distribution is positively correlated with the heat transfer coefficient.The acoustic streaming area is limited,and the heat exchange effect is reduced;The acoustic streaming area expands and the heat transfer effect is enhanced.This study lays a theoretical foundation for the acoustic heat transfer technical optimization in boiler tube arrays,and has important theoretical value and engineering significance.
作者
郑明珂
刘月超
王云峰
闫炜彤
姜根山
ZHENG Mingke;LIU Yuechao;WANG Yunfeng;YAN Weitong;JIANG Genshan(Hebei Key Laboratory of Physics and Energy Technology,Department of Mathematics and Physics,North China Electric Power University,Baoding 071003,China;School of Mathematics and Physics,North China Electric Power University,Beijing 102206,China)
出处
《应用声学》
北大核心
2025年第6期1417-1429,共13页
Journal of Applied Acoustics
基金
国家自然科学基金项目(12074118,12274122)
河北省自然科学基金项目(A2021502001,A2025502025)
河北省高校科学研究项目(ZC2023058)
中央高校基本科研业务费专项资金资助(2025MS184)。
关键词
拓扑声学
管阵列
声流
传热
锅炉换热器
Topological acoustics
Tube array
Sound flow
Heat transfer
Boiler heat exchanger
