考虑流固耦合作用的航空气动安全阀动态特性分析  

Analysis of Dynamic Characteristics of Aviation Pneumatic Safety Valve Considering Fluid-structure Interaction Effect

作　　者：张长帅 陈星 王岩[1] 孟一喆 赵国超[1] 王慧[1] ZHANG Changshuai;CHEN Xing;WANG Yan;MENG Yizhe;ZHAO Guochao;WANG Hui(School of Mechanical Engineering,Liaoning Technical University,Fuxin,Liaoning 123000;Liaoning Institute of Measurement,Shenyang,Liaoning 110000)

机构地区：[1]辽宁工程技术大学机械工程学院,辽宁阜新123000 [2]辽宁省计量科学研究院,辽宁沈阳110000

出　　处：《液压与气动》2024年第12期32-38,共7页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(52204169);辽宁工程技术大学博士启动基金(22-1028)。

摘　　要：应用于航空推进系统的气动安全阀在工作过程中受气流影响,内部载荷不均诱发结构内壁形变,影响航空气动安全阀的动态性能。基于双向流固耦合理论建立航空气动安全阀工作过程的数值仿真模型,通过压力特性试验验证仿真模型的准确性,分析航空气动安全阀阀芯运动情况及内流场压力、速度的变化情况,探究内部流场与结构形变间的影响关系。结果表明:阀芯经振荡调整后趋于稳定,阀口开度稳定在0.45 mm;气体流速在阀口处出现较大变化,最大速度为325.9 m/s;安全阀的活门座、壳体、活门组件及座盘均发生一定程度的形变,活门座的形变量最大,最大形变量为6.554×10^(-5) mm。The aviation propulsion system's pneumatic safety valve is affected by airflow during operation.Uneven internal loads induce deformation of the structure,affecting the dynamic performance of the aviation pneumatic safety valve.The working process of the aviation pneumatic safety valve's numerical simulation model was established by the two-way fluid-structure interaction theory.The accuracy of the simulation model was verified through pressure characteristic experiments.The aviation pneumatic safety valve's spool movement and the changes in pressure and velocity of the internal flow field were analyzed.The relationship between the internal flow field and structural deformation was explored.The results show that the valve spool tends to be stable after oscillation adjustment.The valve port opening is stable at 0.45 mm,and the gas flow rate changes significantly at the valve port.The maximum velocity is 325.9 m/s.The valve seat,shell,valve assembly,and seat plate undergo a certain degree of elastic deformation.The valve seat has a more extensive elastic deformation,with a maximum deformation of 6.554×10^(-5) mm.

关 键 词：航空气动安全阀 流固耦合 动态特性 数值模拟 

分 类 号：TH138[机械工程—机械制造及自动化] V233[航空宇航科学与技术—航空宇航推进理论与工程]