低温风洞排气塔流致振动的理论及数值研究  

Theoretical and numerical study on flow-induced vibration of exhaust tower in a cryogenic wind tunnel

作　　者：张伟[1,2] 高鑫鑫[3] 高荣 张小斌[3] 程俊[2] ZHANG Wei;GAO Xinxin;GAO Rong;ZHANG Xiaobin;CHENG Jun(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China;China Aerodynamics Research and Development Center,Mianyang Sichuan 621000,China;Institute of Refrigeration and Cryogenics,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]国防科技大学空天科学学院,长沙410073 [2]中国空气动力研究与发展中心,四川绵阳621000 [3]浙江大学制冷与低温工程研究所,杭州310027

出　　处：《航空动力学报》2024年第7期86-94,共9页Journal of Aerospace Power

基　　金：中国空气动力研究与发展中心基础和前沿技术研究基金探索项目(PJD20200240)。

摘　　要：为分析排气塔在自然风载和内流共同作用下的结构安全性,采用理论和数值模拟方法分析了排气塔的流致振动响应情况.理论分析获得了排气塔在自然风载作用下的顺流响应和均值响应.采用计算流体力学方法,shear stress transport(SST)k-ω湍流模型和动网格数值技术实现了排气塔的双向流固耦合数值模拟,获得了排气塔在内外流动混合作用下的速度、压力和涡量分布.表明排气塔在特定风载下的旋涡脱落频率接近1阶模态频率,塔体应力较小,在许用应力范围内.The flow-induced vibration response of the exhaust tower was analyzed by theoretical and numerical simulation methods to investigate the structural safety of the exhaust tower under the combined action of natural wind load and internal flow.The exhaust tower's co-current response and mean response under the action of wild wind load were achieved.Then,using the computational fluid dynamics approach,shear stress transport(SST)k-ωturbulence model and dynamic mesh numerical technology,the exhaust tower's two-way fluid-structure interaction numerical simulation was realized.The exhaust tower's velocity,pressure,and vorticity distribution under the action of internal and external flow mixing were also obtained.The vortex shedding frequency of the exhaust tower under a specific wind load was close to the first-order modal frequency of the structure.The gained stress was within the allowable stress range of stainless steel.

关 键 词：排气塔 流致振动 低温风洞 涡量 流固耦合 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]