实验流体力学2026，Vol.40Issue(2)：13-23,11.DOI:10.11729/syltlx20250020
风洞背景辐射干扰下高速飞行器红外特征测量修正方法的数值研究
Numerical study on correction methods for infrared characteristics measurement of high-speed aircraft under wind tunnel background radiation interference
施小娟 1张乐乐 1吉洪湖 1谢峰 2罗万清3
作者信息
- 1. 南京航空航天大学,南京 210016
- 2. 中国空气动力研究与发展中心 超高速空气动力研究所,绵阳 621000
- 3. 飞行器流体物理全国重点实验室,绵阳 621000
- 折叠
摘要
Abstract
Wind tunnel testing serves as a critical method for studying the performance of high-speed aircraft.Enhancing the measurement accuracy of infrared characteristics in wind tunnel tests can provide more reliable data support for predicting aircraft infrared signatures and designing stealth performance,embodying significant engineering value.However,in wind tunnel tests,the interference of background radiation inside the wind tunnel makes it difficult to accurately obtain the true infrared radiation(IR)of the aircraft,directly affecting the execution of wind tunnel tests and the use of test data.The CFD(computational fluid dynamics)method verified by simulation accuracy was used to simulate the state of a conventional hypersonic blowdown wind tunnel with the incoming Mach number at the test section inlet in the range of 3-10.A numerical study was conducted on correction methods for IR measurement in the 3-5 μm band at a lateral 90° direction for the aircraft and lateral jet,aiming at the interference of wind tunnel background radiation.A progressive measurement procedure based on background field separation was proposed.Through a stepwise experimental design involving cold-model interference calibration and hot-target measurements,the interference signals were stripped.The relationships between the intrinsic radiation of the aircraft surface and lateral jet and the total IR received by the detector were established respectively.The interference factors in IR measurement were identified.The correction formulas for measuring the intrinsic IR of the aircraft surface and lateral jet were derived.The results show that the influence of interference factors on the IR of lateral jet is relatively small,ranging between 1.6%and 2.8%.When the incoming flow Mach number in the wind tunnel test section is between 3 and 5,the influence of interference factors on the IR of the aircraft surface exceeds 10%.Especially at a Mach number of 3,the proportion of interference signals reaches 70.72%.关键词
风洞/高速飞行器/侧向喷流/红外辐射/干扰因素/修正方法Key words
wind tunnel/high-speed aircraft/lateral jet/infrared radiation/interference factor/correction method分类
航空航天引用本文复制引用
施小娟,张乐乐,吉洪湖,谢峰,罗万清..风洞背景辐射干扰下高速飞行器红外特征测量修正方法的数值研究[J].实验流体力学,2026,40(2):13-23,11.
