脉冲燃烧风洞新型悬挂式测力系统  

New suspension force measuring system in impulse combustion wind tunnel

作　　者：刘勃锴 高宏力[1] 吴颖川[2] 张小庆[2] 李世超[1] LIU Bo-kai;GAO Hong-li;WU Ying-chuan;ZHANG Xiao-qing;LI Shi-chao(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610000,China;Air-breathing Hypersonic Technology Research Center,China Aerodynamics Research and Development Center,Mianyang 621000,China)

机构地区：[1]西南交通大学机械工程学院,四川成都610000 [2]中国空气动力研究与发展中心超高速气动力研究所,四川绵阳621000

出　　处：《浙江大学学报（工学版）》2018年第4期619-627,共9页Journal of Zhejiang University：Engineering Science

基　　金：高超声速冲压发动机技术重点实验室基金资助项目(STS/MY-ZY-2015-007);国家自然科学基金资助项目(51775452)

摘　　要：针对高超声速风洞试验中存在的支架干扰问题和内式天平占用带动力试验模型内部功能性空间问题,提出新型悬挂式测力系统.该系统基于盒式天平原理,试验模型、响应拉杆和支撑框架分别作为浮动框、带传感弹性连杆和固定框,将三者作为测力系统的整体来开展研究,不单独设计内式天平.响应拉杆杆体设计为铰链形式,实现空气动力的机械分解,拉杆固定端为轮辐式结构,轮辐条上的应变计组为惠斯顿全桥,实现空气动力的电气分解.在流固耦合方面的计算结果表明,悬挂式测力方案相比传统方案在升力测量上的干扰降低了约11%,在模态、强度和刚度等方面均能满足脉冲燃烧风洞试验的要求.new suspension force measuring system was proposed in order to solve the problem that support interference exists in hypersonic wind tunnel tests and internal balance occupies model’s functional space in test with propellers.The system was based on the principal of box balance.The test model,response rods and support frame were used as floating frame,elastic linkages with sensitive elements and fixed frame respectively.These three parts were taken as a holistic system to conduct research instead of designing internal balance alone.The body of response rod was in the form of hinge to realize mechanical decomposition of aerodynamic loads.The fixed end of the rod was designed as a spoke type structure.The strain gauges set on wheel spokes made up Wheatstone bridges in order to realize electrical decomposition of aerodynamic loads.The calculation results of fluid solid coupling indicated the interference of lift-force measured by the new scheme was approximately 11%lower than that by the traditional scheme.The new system can meet the requirements of impulse combustion wind tunnel test in modal,strength and stiffness aspects.

关 键 词：风洞试验 测力系统 高超声速 一体化设计 支架干扰 

分 类 号：TH823[机械工程—仪器科学与技术]