摘要
为获得地面试验中主动冷却燃烧室在高温状态下的结构总变形和局部应变,基于数字图像相关法开展了非接触测量试验研究。分别采用加速鲁棒特征算法和改进的圆柱曲面数字图像相关法完成了燃烧室结构总变形和局部应变测量及分析。测量结果表明,燃烧室稳定工作条件下,结构轴向总变形约4.8 mm、局部平均应变约0.0049。测量结果与工程粗略估算结果比较吻合,说明所使用的非接触测量方法有效,能够支撑燃烧室热结构设计,测量数据能够用于三维结构强度数值计算的验证。
In order to obtain the high temperature deformation of the generatively cooled combustor structure in ground test,experimental investigation based on non-contact measurement was conducted.The speeded-up robust feature algorithm and the improved digital image correlation of cylindrical surface were used to measure the total deformation and the partial strain of the combustor,respectively.The results show that the experimental total deformations and partial strains of the combustor were about 4.8 mm and 0.0049 respectively under the stable working condition.The experimental results agree well with engineering rough estimated ones,which shows that the presented non-contact measurement is applicable for combustor structure design and the experimental data are useful for validating the numerical calculation of the three-dimensional structural strength analysis.
作者
张磊
张若凌
肖世德
刘禹
熊鹰
ZHANG Lei;ZHANG Ruoling;XIAO Shide;LIU Yu;XIONG Ying(Science and Technology on Scramjet Laboratory,Hypervelocity Aerodynamics Institute of China Aerodynamics Research and Development Center,Mianyang Sichuan621000,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu610000,China)
出处
《实验流体力学》
CAS
CSCD
北大核心
2021年第1期53-59,共7页
Journal of Experiments in Fluid Mechanics
关键词
主动冷却燃烧室
高温变形
非接触测量
数字图像相关法
regeneratively cooled combustor
high temperature deformation
non-contact measurement
digital image correlation
