A real-time infrared radiation imaging simulation method of aircraft skin with aerodynamic heating effect

Li, Ni; Liu, Zhenhua; Wang, Shaodan; Gong, Guanghong; Ren, Long‐Fei

doi:10.1016/j.infrared.2015.06.014

Cited by 22 publications

(9 citation statements)

References 17 publications

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“…where 𝑇 𝑎𝑡𝑚 is the ambient atmospheric temperature of the aircraft, 𝛽 is the temperature recovery coefficient, 𝜐 is the specific heat capacity ratio, 𝑣 𝑎𝑖𝑟𝑐𝑟𝑎𝑓𝑡 is the flight speed of the aircraft, 𝐶 is a constant (𝐶≈0.84) (Li, N. et al 2015).…”

Section: Radiation Signature Of the Aircraft And Backgroundmentioning

confidence: 99%

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A novel detection performance modular evaluation metric of space-based infrared system

Zhou

Zhang

et al. 2022

Opt Quant Electron

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In order to reflect the space-based full chain information of the detection process comprehensively and objectively, we proposed a novel modular evaluation metric to discuss the target, background and system independently. It takes the equivalent radiation intensity as the parameter, which can evaluate the detection performance of the system quantitatively. In this paper, taking the fifth-generation American stealth fighter F22 as an example, the mathematical detection model of the space-based infrared system to aircraft targets in the Earth background is described. A modular evaluation metric is proposed. The simulation analyzes the impact of different detection scenes and system parameters on system equivalent irradiance. Furthermore, recommendations for the optimization of the detection system are given. The research results provide a new idea for the analysis of the detection performance of highly maneuverable targets under dynamic backgrounds and have guiding significance for the performance evaluation and parameter design of the infrared detection system.

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Section: Radiation Signature Of the Aircraft And Backgroundmentioning

confidence: 99%

“…The fuselage is flying parallel to the sea. Considering the F22's strong infrared stealth capability, this paper sets the infrared emissivity of the skin to 0.5, and the diffuse reflectance of the fuselage is 0.2 (Li, N. et al 2015;Baranwal, N. et al 2015;Cha, J. H. et al 2014;Pan, X. et al 2015;Wu, K.F. et al 2020).…”

Section: Typical Condition Analysismentioning

confidence: 99%

A novel detection performance modular evaluation metric of space-based infrared system

Zhou

Zhang

et al. 2022

Opt Quant Electron

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“…where atm T is the ambient atmospheric temperature of the aircraft,  is the temperature recovery coefficient, v is the specific heat capacity ratio, Ma is the flight speed of the aircraft ( the unit is Mach number), and 0.84 C  ( Li, N. et al 2015). The temperature distribution and spectral emissivity curve of the aircraft plume are the main factors used to analyze the plume radiation signature.…”

Section: The Aircraft Radiation Signaturementioning

confidence: 99%

“…F22, as a typical fifth-generation fighter aircraft, is selected to be the aircraft target. The infrared emissivity of the F22's skin is set to 0.5 (Baranwal, N. et al 2015;Li, N. et al 2015;Cha, J. H. et al 2014), the speed is Mach 1, and the plume temperature is 1300K. The superiority of the proposed method is illustrated by comparing it with the traditional fixed-spectrum detection system.…”

Section: Simulation and Analysismentioning

confidence: 99%

Detection spectrum optimization of stealth aircraft targets from a space-based infrared platform

et al. 2022

Opt Quant Electron

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Advances in infrared detection techniques require novel spectrum dynamicmodification strategies capable of sensing unprecedentedly low target radiant intensities. A conventional fixed-spectrum detection system cannot satisfy the effective detection of stealth aircraft targets due to complex Earth background clutter and atmospheric attenuation. Therefore, a detection method that can highlight aircraft targets is urgently needed to enhance stealth aircraft detectability. In this research, a spectrum set consisting of different bandwidths associated with a central wavelength is established. Furthermore, a signal-to-noise ratio of the stealth aircraft is computed using the established spectrum set. Finally, the optimal spectrum is selected according to the maximal signal-to-noise ratio from the spectrum set. Our numerical experiments and simulations further demonstrate that the proposed methodology can substantially strengthen the detection performance of stealth aircraft compared with traditional fixed-spectrum detection systems. This work on detection spectrum optimization paves the way to stealth aircraft detection and opens new vistas in the field of target detection technology.

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“…Research on the real-time infrared radiation imaging simulation method of aircraft skin with aerodynamic heating effect, Li et al [33] employed a dynamic simulation method to carry out the research of infrared radiation (IR) characteristics of an aircraft during the flight, and the aeroheating model and environmental radiation model were established for solving the heat balance equations.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Aerothermal Analysis of a Cone-Cylinder Flight Body

Zhang

Jia

Mkumbuzi

et al. 2020

International Journal of Aerospace Engineering

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Exploring the aerothermal characteristic of a flight body has great military applications in tracking, locating, thermal protection, and infrared stealth technologies. Available studies are mostly focused on the transient aerothermal characteristics of vehicles in some specific flight datum, which are not able to satisfy the requirements in real-time tracking for an infrared system. This paper probes into a method of dynamic thermal analysis of a cone-cylinder flight body with a high spinning speed. Firstly, a theoretical model for analyzing the dynamic aerothermal characteristics is established using the thermal node-network method. Then, trajectory datum and the convective heat-transfer coefficients are solved simultaneously. Besides, the trajectory datum in supersonic, transonic, and subsonic regimes is separately defined as the boundary conditions, and fluid-thermal analysis methods are implemented by a combination of sliding mesh and multicoordinate approaches. Finally, the flow characteristics are analyzed and compared with disregarding the rotational speed. The results demonstrate that there are significant differences between the two cases, especially at the high-speed regimes. This study further confirms that it is essential to conduct the aerothermal analysis from a dynamic point of view, and taking the impacts of coupling motion into account is also of vital importance.

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A real-time infrared radiation imaging simulation method of aircraft skin with aerodynamic heating effect

Cited by 22 publications

References 17 publications

A novel detection performance modular evaluation metric of space-based infrared system

A novel detection performance modular evaluation metric of space-based infrared system

Detection spectrum optimization of stealth aircraft targets from a space-based infrared platform

Dynamic Aerothermal Analysis of a Cone-Cylinder Flight Body

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