复杂流场下对焊燃油管路流固耦合特性分析  

Characterization of Fluid-solid Coupling in Butt-welded Fuel Line Under Complex Flow Field

作　　者：权凌霄[1,2] 宫瀚文 孙世博 李朋杰 王明远 QUAN Lingxiao;GONG Hanwen;SUN Shibo;LI Pengjie;WANG Mingyuan(School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004;Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,Yanshan University,Qinhuangdao,Hebei 066004)

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]燕山大学河北省重型机械流体动力传输与控制实验室,河北秦皇岛066004

出　　处：《液压与气动》2024年第10期54-64,共11页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金面上项目(51775477)。

摘　　要：飞机燃油管路内部流体流动特性复杂,油液与管壁相互作用产生的流固耦合作用严重影响管路安全,深入研究流固耦合特性对减少管路振动和磨损具有重要意义。通过金相检测和微拉伸试验获得焊接接头区域具体尺寸和力学性能参数,建立带有90°弯管的对焊燃油管路流固耦合模型。采用Realizable k-ε湍流模型开展研究,综合分析在恒速流场下不同入口流速对流体域流动特性及固体域应力响应规律的影响和在脉动流场下不同区域等效应力的响应结果。结果表明:恒速流场下,出口弯管段最大等效应力受流速影响显著;脉动流场下,焊接接头处的最大等效应力出现在焊缝区且应力水平较为集中。可为改善飞机燃油管路的构型设计和系统性能提供重要参考。Aircraft fuel pipeline internal fluid flow characteristics are complex,the interaction between the oil and the pipe wall produces the fluid-solid coupling effect seriously affects the safety of the pipeline,in-depth study of the fluid-solid coupling characteristics of the pipeline to reduce vibration and wear of the pipeline is of great significance.The specific dimensions and mechanical parameters of the welded joint area are obtained through metallographic testing and microtensile testing,and the fluid-solid coupling model of the butt-welded fuel line with a 90°bend is established.Realizable k-εturbulent flow model is adopted to carry out the study,and the effects of different inlet flow rates on the flow characteristics and the stress response law in the fluid domain and the response of the equivalent force in different regions are comprehensively analyzed under the constant velocity flow field and the results of the response of the equivalent force in different regions are also analyzed under the pulsating flow field.It is found that:under constant velocity flow field,the maximum equivalent force at the outlet bend section is significantly affected by the flow velocity;under pulsating flow field,the maximum equivalent force at the welded joint appears in the weld area and the stress level is more concentrated.This will provide an important reference for improving configuration design and system performance of aircraft fuel lines.

关 键 词：对焊燃油管路 流固耦合 流动特性 应力响应 

分 类 号：TH137[机械工程—机械制造及自动化]