Computation and analysis of aero-optic imaging deviation of a blunt nosed aircraft with Mach number 0.5–3

Abstract

Aero-optic imaging is a kind of optical effect, which describes the imaging deviation on the imaging plane. In this paper, the effect of the change of Mach number of blunt aircraft on the aero-optic imaging deviation is studied. The imaging deviations of Mach number 0.5–3 are analyzed systematically. The results show that with the increase of Mach number, imaging deviation increases gradually, and the increase rate is gradually slow. Imaging deviation slope decreases gradually with the increase of Mach number, and gradually tends to be zero, suggesting that imaging deviation is not sensitive to the change of the larger Mach number. In other words, the Mach number of smaller changes can lead to larger imaging deviation. As the Mach number of the aircraft increases, the slope of the imaging offset tends to be closer and closer to 0. When the Mach number of the aircraft increases to a certain extent, the change of the imaging offset will not have much influence. Therefore, in order to reduce the impact of flight speed on imaging migration, the aircraft should fly at a higher Mach number.

References

[1] SUTTON G W, POND J E, SNOW R, et al. Hypersonic interceptor performance evaluation center aero-optics performance predictions[J]. Journals of gerontology, 1993.

[2] SuttonG W, PondJ E, SnowR, et al.. Hypersonic interceptor aero-optics performance pred-dictions[J]. Journal of spacecraft and rockets, 1994, 31(4):592-599

[3] LiG C. Aerooptics[M], 2006, Beijing, National Defense Industry Press(in Chinese)

[4] YingX L. Aerooptics principle[M], 2003, Beijing, China Aerospace Press(in Chinese)

[5] GilbertK G, OttenL J. Aero-optical phenomena[M], 1982, New York, AIAA

[6] ClarkR, BanishM, LfammerJ. Fundamentals of aero-optics phenomena[C], 1994, Reston, AIAA 14p

[7] XuL, ZhangZ Y, ChenX, et al.. Prediction of aero-optical imaging migration based on BP neural network optimized by improved sparrow search algorithm[J]. Journal of optoelectronics laser, 2021, 32(06):653-658(in Chinese)

[8] WangT, ZhaoY, XuD, et al.. Numerical study of evaluating the optical quality of supersonic flow fields[J]. Applied optics, 2007, 45(23):5545-5551

[9] XuL, XueD T, LvX Y. Computation and analysis of backward ray-tracing in aero-optics flow fields[J]. Optics express, 2018, 26(1):567-576

[10] XuL. Research on the aero-optical effects of an advanced infrared guided vehicle[D], 2012, Xi’an, Xi’an Jiaotong University(in Chinese)

[11] YaoY. Analysis and prediction of aero-optical imaging migration for typical aircraft[D], 2020, Tianjin, Tianjin University of Technology(in Chinese)

[12] ChenX. Calculation and prediction of aero-optical imaging migration with different eye-roll angles[D], 2021, Tianjin, Tianjin University of Technology(in Chinese)

[13] ZhangZ Y. Research and prediction of 0–25km aero-optical imaging deviation for blunt head aircraft[D], 2022, Tianjin, Tianjin University of Technology(in Chinese)

[14] XuL, ZhangZ Y, WangT, et al.. Numerical study on aero-optical imaging deviations of vehicles at different altitudes[J]. Optoelectronics letter, 2022, 18(02):97-102

[15] XuL, CaiY L. High altitude aero-optic imaging deviation prediction for a hypersonic flying vehicle[C], 2011, New York, IEEE: 210-214

[16] YaoY, XueW, WangT, et al.. Influence of LOS angle on aero-optics imaging deviation[J]. Optik-international journal for light and electron optics, 2020, 202(163732):1-5

[17] WuY Y, XueW, XuL, et al.. Optimized least-squares support vector machine for predicting aero-optic imaging deviation based on chaotic particle swarm optimization[J]. Optik-international journal for light and electron optics, 2020, 206(163215):1-8

[18] XuL, CaiY L. Influence of altitude on aero-optic imaging deviation[J]. Applied optics, 2011, 50(18):2949-2957

[19] XuL, CaiY L. Imaging deviation through non-uniform flow fields around high-speed flying vehicles[J]. Optik, 2012, 123(13):1177-1182

[20] WangL Y, XuL, ZhaoS W, et al.. Influence of 0°–15° attack angle on aero-optical imaging deviation of a blunt-nose vehicle[J]. Applied optics, 2023, 62(2):391-397