A New Method for Analyzing Aero-Optical Effects with Transient Simulation

Yang, Bo; Zhang, Fan; He, Yu; Hu, Haidong; Yang, Zhaohua

doi:10.3390/s21062199

Cited by 5 publications

(4 citation statements)

References 36 publications

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“…8 Yang built a transient simulator using an artificial vortex structure to transiently simulate the aero-optical flow field, which provides a new idea to study the aerooptical effect. 9 Yao et al conducted a study for a blunt-head side-window aircraft and found a gradual decrease in imaging deviation with increasing line of sight (LOS) angle. 10 Bo et al developed a starlight transmission aero-optical simulator, which can simulate the aero-optical effects induced by the turbulent boundary layer in the vicinity of the optical window and reduce the computational requirements for aero-optical simulation.…”

Section: Introductionmentioning

confidence: 99%

“…study found that the operating time influences the infrared detection system and obtained a temporal characterization of the degradation of imaging quality caused by aero-optical effects under hypersonic conditions 8 . Yang built a transient simulator using an artificial vortex structure to transiently simulate the aero-optical flow field, which provides a new idea to study the aero-optical effect 9 . Yao et al.…”

Section: Introductionmentioning

confidence: 99%

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Influence of optical sensor position on aero-optical imaging deviation in a blunt-headed front-window aircraft

Wang,

Xu,

2024

Opt. Eng.

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In this work, aero-optical imaging deviation is investigated for a blunt-headed frontwindow aircraft, and the deflection angle is introduced to calculate the imaging deviation. This work mainly analyzes the influence of optical sensor position and line of sight (LOS) angle changes on imaging deviation. The results show that the imaging deviation monotonically increases with the increase of LOS angle when the sensor position is in front, and the value of imaging deviation is large. When the sensor position is at the back, the imaging deviation increases with the increase of LOS angle, then decreases, and then increases in the reverse direction, and the value of the imaging deviation is small.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of optical sensor position on aero-optical imaging deviation in a blunt-headed front-window aircraft

Wang,

Xu,

2024

Opt. Eng.

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“…The high-frequency sampling structure of high-speed turbulence could be obtained via laser scattering technology [13,14]. Through a statistical analysis, it could be found that the distortion characteristics caused by aero-optical effects are closely related to different turbulence scale structures [15][16][17][18][19][20]. Vortex structures of different scales can lead to different errors in optical sensors.…”

Section: Introductionmentioning

confidence: 99%

A New Method for Analyzing the Aero-Optical Effects of Hypersonic Vehicles Based on a Microscopic Mechanism

Yang

Liu

et al. 2022

Aerospace

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Aero-optical effects are the key factors that restrict the accuracy of the optical sensors of hypersonic vehicles, and the numerical simulation of aero-optical effects is a powerful tool with which to analyze aero-optical distortion. Most existing research focuses on the simulation analysis of refraction distortion based on the density field at the macro level via the ray-tracing method. In this paper, a method for analyzing aero-optical effects based on the interaction between photons and gas molecules is proposed and can explain the optical distortion and energy dissipation caused by aero-optical effects at the micro level. By establishing a transmission model of photons in turbulence, a simulation method of aero-optical effects based on a microscopic mechanism is designed and breaks through the limitations of a traditional macro method in energy analyses. The optical distortion parameters based on photonics are compared with the physical quantities of traditional aero-optical effects, which verifies the effectiveness of the micro analysis on the macro scale and provides a new idea for studying the microscopic mechanism of aero-optical effects.

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“…The disturbance of light by the high-speed turbulence is a key problem in the study of aero-optical effects [1][2][3][4][5] . The essence of the process can be attributed to the scattering of photon energy in multiple directions after the "collision" between airflow molecules and photons 6 . At present, the scattering analysis of light in high-speed turbulence is to simplify the airflow molecules into a macroscopic polymer called "the transmission medium" [7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

A new method for analysing photon-scattering in high-speed turbulence

Yang

Zhang

et al. 2022

Third International Conference on Computer Science and Communication Technology (ICCSCT 2022)

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Optical scattering caused by the high-speed turbulence will reduce the accuracy of optical sensors on aircraft. The existing research mainly focuses on the scattering field on the macro scale. A new method to analyse the photon-scattering characteristics in high-speed turbulence from the micro point of view is proposed in this paper, which can explain the micro disturbance of airflow molecules to photons. In order to construct the relationship between micro disturbance and macro distortion, molecular clusters are proposed to describe the multi-molecular scattering field, and the scattering characteristics of molecular clusters with wavelength, density and vortex shape are obtained by statistical method. The simulation results show that the coherent superposition of scattered waves is the dominant factor of the micro scattering characteristics of molecular clusters. The method proposed in this paper provides a new idea for the study of aero-optics under complex flow conditions.

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A New Method for Analyzing Aero-Optical Effects with Transient Simulation

Cited by 5 publications

References 36 publications

Influence of optical sensor position on aero-optical imaging deviation in a blunt-headed front-window aircraft

Influence of optical sensor position on aero-optical imaging deviation in a blunt-headed front-window aircraft

A New Method for Analyzing the Aero-Optical Effects of Hypersonic Vehicles Based on a Microscopic Mechanism

A new method for analysing photon-scattering in high-speed turbulence

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