声流对单管道周围换热特性的影响  

Effect of acoustic streaming on heat transfer around a single tube

作　　者：李博轩 廉成龙 郭荣旺 祖梦泽 刘月超 姜根山[2,3] LI Boxuan;LIAN Chenglong;GUO Rongwang;ZU Mengze;LIU Yuechao;JIANG Genshan(Department of Mathematics and Physics,North China Electric Power University,Baoding 071003,Hebei,China;Hebei Key Laboratory of Physics and Energy Technology,North China Electric Power University,Baoding 071003,Hebei,China;School of Mathematics and Physics,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学数理系,河北保定071003 [2]华北电力大学河北省物理学与能源技术重点实验室,河北保定071003 [3]华北电力大学数理学院,北京102206

出　　处：《声学技术》2023年第5期573-579,共7页Technical Acoustics

基　　金：河北省自然科学基金项目(A2021502001,A2019502160);中央高校基本科研业务费(2020 MS140);河北省高等教育教学改革研究(2021GJJG416,2019GJJG414)。

摘　　要：通过仿真与实验的方式,研究声波影响管道外部的流动和换热特性。在仿真中,对输入声压级相同时,不同频率的声流速度进行研究,结果表明频率对管壁处平均声压级的影响较小,但对管壁周围切向速度的影响较大。基于声波对流场分布的影响,在实验中研究不同声压级和频率对单根钢管换热的影响,结果表明声压级不变,频率越低,钢管换热效果越好;频率不变,声压级越大,钢管换热效果越好。仿真与实验结果表明:管道周围的换热效果与声流速度的大小成正比,而声流大小与频率和激励速度直接相关,激励速度越大,频率越低,钢管附近声流运动越剧烈,采用低频高声压级的声波能够加速钢管的换热过程,该研究为声波影响管道换热特性提供了理论依据。By means of simulation and experiment,the influences of acoustic wave on the flow and heat transfer characteristics outside the tube are studied.In the simulation,the acoustic streaming velocities at different frequencies under the same input pressure level are studied,and the results show that the frequency has little influence on the average sound pressure level at the tube wall,but has great influence on tangential velocity around the tube wall.Based on the influence of acoustic wave on the convection field distribution,the effects of different sound pressure levels(SPLs)and frequencies on the heat transfer of a single steel tube are studied experimentally,and the results show that for an unchanged SPL,the lower the frequency,the better the heat transfer effect of steel tube;for an unchanged frequency,the higher the SPL the better the heat transfer effect of steel tube.By combining simulated and experimental results,it is shown that the heat effect around the tube is proportional to the acoustic streaming velocity;the scale of acoustic streaming is directly related to the frequency and motivation speed,i.e.the greater the motivation speed and the lower the frequency,the more intense the acoustic streaming near the steel tube.By using low frequency and high SPL sound waves,the heat transfer process of steel tube can be accelerated.This study provides a theoretical basis for sound wave affecting heat transfer characteristics of pipeline.

关 键 词：声流 单管换热 努塞尔数 强化因子 切向速度 

分 类 号：O429[理学—声学]