摘要
先进大型风洞是支撑飞行器设计验证的战略性设施,由于先进飞行器的复杂气动外形、非标准化结构,给其全场分布式参数测量带来了巨大挑战,包括模型表面应力场、应变场、温度场、气流分布,以及模型周围流场空气动力学结构和速度场信息,而且还需要解决测量数据的正确性验证问题。本文讨论了柔性传感器测量技术和非接触光学的流场测量技术,利用大面积、柔性传感器获取飞行器表面的物理场分布,PIV技术获得飞行器周围流场结构或信息,实时、定量显示飞行器全场物理场信息,并与计算模拟或飞行数据库进行相互融合与支撑,实现飞行器气动特性在线感知。全场测量技术将全面提升风洞试验的数据采集能力,突破传统测量系统难以实现全场感知的局限,并实现风洞试验的定量测量与大规模数据的处理与分析,为大型风洞智能运行奠定基础。
Large-scale wind tunnels are strategic facilities to solve the design and verification of high-speed flight vehicle, and the complexity of aerodynamic shape and non-standard structure of advanced aircraft has brought great challenge to its full-field distributed parameter measurement, including the stress field, strain field, temperature field and flow distribution on the model surface, and the structure and velocity in- formation of aerodynamic flow field around the model. Additionally, the accuracy of measurement data vali- dation needs to be solved. This article discusses the flexible sensor measurement technology and non-con- tact optical measurement technology. Large-area, flexible sensors are utilized to obtain physical field distri- bution on the aircraft surface, and PIV technique to obtain the flow field around the aircraft, to realize real- time, quantitative information display of full-field physical parameters. The measurement data are com- pared and integrated with computational simulation or flight database, to reach online sensing of aerodynamic characteristics. Full-field measurement technology will improve the acquisition ability of test data of wind tunnels, and break through the limitations of traditional measurement system, and lay a foundation for intelligent operation of large-scale wind tunnels.
出处
《中国科学基金》
CSSCI
CSCD
北大核心
2017年第5期450-460,共11页
Bulletin of National Natural Science Foundation of China
关键词
风洞试验
智能蒙皮
PIV
非接触式测量
柔性电子
wind tunnel test
smart skin
PIV
non-contact measurement
flexible electronics
