大迎角试验数据精度及影响因素分析  

Analysis on data precision and influential factors of experiments at high incidence

作　　者：王元靖[1] 范召林[1] 吕全洲[1] 贺中[1] 吴军强[1] 

机构地区：[1]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《实验流体力学》2006年第2期12-17,共6页Journal of Experiments in Fluid Mechanics

摘　　要：着重分析了粗糙带、偏航角β、模型抖动以及滤波频率、采样时间和样本长度等因素对于大迎角试验数据精度的影响。结果认为:常规试验采用的滤波频率会导致关键气动信息的丢失,滤波频率的选取尤为重要;弯刀系统的横向刚度是影响大迎角数据精度的一个重要因素,试验中如何降低其横向刚度的影响是一难点。In this paper, the effects of some factors on data precision obtained at high incidence, such as grit strip, sideslip angle, model twittering, sampling frequency, sampling time and sample length, are analyzed. The results show that the filtering frequency in routine experiment might lead to the loss of key aerodynamic information. It is very important to choose a proper frequency in experiments at high incidence. Another important factor that can affect the data precision is the lateral hardness of the sting system and it is a difficult issue to reduce its effect.

关 键 词：大迎角流动 数据精度 不确定度 风洞实验 

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]