H型翅片管换热器声波吹灰性能参数优化分析  

An Optimal Parameters Analyse on the Performance of Sonic Antiscaling on H-Type Finned Tube Heat Exchanger

作　　者：曹生现[1] 周家宁 王恭[1] Cao Shengxian;Zhou Jianing;Wang Gong(School of Automation Engineering,Northeast Electric Power University,Jilin Jilin 132012)

机构地区：[1]东北电力大学自动化工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2018年第3期24-31,共8页Journal of Northeast Electric Power University

基　　金：国家自然科学基金项目(51376042)

摘　　要：为了更准确高效地解决换热器积灰现象严重导致的换热效率降低、设备故障频发等问题,同时为换热器声波吹灰装置的设计提供更全面精确的理论指导,结合COMSOL Multiphysics多物理场有限元仿真软件,以H型翅片管换热器为物理原型,建立了声、固、流三场耦合的三维吹灰模型,开展了在不同声场流场参数下管道受力特性的分析研究,探讨了针对H型翅片管换热器的声波吹灰性能的参数优化.结果表明:该模型可以准确反映H型翅片管换热器在声波吹灰过程中的受力分布特性;位置相近的情况下,光管与鳍片交界处的受力明显高于鳍片部分的受力;点声源频率在200 Hz左右时,管道受力基本达到最大,小于或大于200 Hz管道受力则逐渐减小;考虑流场流速影响时,迎风面受力大于背风面受力.仿真结果为声波吹灰技术在换热器中的应用提供了设计指导.In order to provide some theoretical basis for the application of acoustic sootblowing technology in the heat exchanger of power plant,and change the current heat exchanger sonic soot device for the empirical design of the status quo.Using COMSOL multiphysics finite element simulation software,the H-type finned tube heat exchanger is used as the physical prototype,and the three-dimensional soot model with sound,solid and flow is established.The stress characteristics of the pipeline under different sound field parameters are analyzed.The results show that the model can accurately reflect the distribution characteristics of the H-type finned tube heat exchanger in the flue with different frequency acoustic waves. When the position is close,the force at the junction of the light pipe and the fin is obviously higher than that of the fin Part of the force; point source frequency of about 200 Hz,the pipe force generally reach the maximum,and less than or greater than 200 Hz pipe force are gradually reduced; consider the impact of flow field velocity,the wind force is greater than the leeward surface force.The simulation model is consistent with the experimental results.Therefore,the model can provide theoretical basis and design guidance for the application of acoustic sootblowing technology in heat exchangers.

关 键 词：声波吹灰 H型翅片管 有限元 参数优化 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]