发动机动力模拟风洞试验中的空气桥技术  

Air bridge technology for engine power simulation test in wind tunnel

作　　者：章荣平[1,2] 王勋年[1,2] 黄勇[2] 

机构地区：[1]中国空气动力研究与发展中心空气动力学国家重点实验室,四川绵阳621000 [2]中国空气动力研究与发展中心低速空气动力学研究所,四川绵阳621000

出　　处：《航空动力学报》2015年第4期910-915,共6页Journal of Aerospace Power

基　　金：空气动力学国家重点实验室基金(SKLA2009A0103)

摘　　要：介绍了发动机动力模拟风洞试验中的空气桥设计技术和影响修正方法.通过自由度分析,选择了合理空气桥布局,采用有限元方法对空气桥关键受力梁进行了优化,建立了空气桥天平一体化数值模拟技术,使得空气桥和天平刚度更加匹配.通过这些设计及优化使得空气桥的作用力最小,并具有较强的克服压力影响、温度影响的能力.通过试验建立了空气桥附加刚度影响、内部压力影响、温度影响和内部流量影响的修正方法,进一步减小了空气桥对天平的影响.在8m×6m低速风洞进行了某大展弦比飞机全模涡扇动力模拟器(TPS)短舱动力模拟试验.试验结果重复性好,阻力系数精度达到0.000 3,和相关文献吻合.这表明空气桥技术是成功的,满足了TPS短舱动力模拟试验要求.The design technology and correction method of the air bridge for engine simulation test in wind tunnel were presented.The layout of the air bridge was determined according to freedom analysis.By finite element analysis,the key beams of air bridge were optimized.The rigidity of the air bridge and the balance was matched based on air bridge and balance assembly numerical simulation.These design and optimization minimized the applied force of the air bridge and improved the capacity for overcoming pressure and temperature effect.The rigidity effect,pressure effect,temperature effect and mass flow effect of the air bridge were corrected by serial tests.These corrections further minimized residual force of the air bridge.A high aspect ratio airplane full-span turbofan powered simulators（TPS）test was conducted in 8m×6mlow speed wind tunnel.The test results were good in repeatability.The standard deviation of drag coefficient was 0.000 3.The test results also agreed well with related papers.The air bridge technology is thus proved successful and can meet the requirement of TPS nacelle power simulation test.

关 键 词：风洞试验 发动机模拟 动力影响 空气桥 涡扇动力模拟器 

分 类 号：V211.7[航空宇航科学与技术—航空宇航推进理论与工程]