Measurements of a micro gas turbine plume and data reduction for the purpose of infrared signature modeling

Sircilli, F.; Retief, S. J. P.; Magalhães, Luciano Barbosa; Ribeiro, Luty R.; Zanandrea, Ademilson; Brink, C.; Nascimento, Maikon; Dreyer, Maria M.

doi:10.1109/taes.2015.140392

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…The two-equation k-ε turbulent model is thus used in this study, which has been used in Refs. [20][21][22][23]. The code is based on a numerical framework finite volume method and a multi-dimensional total variation denoising (TVD) scheme to accurately simulate the supersonic flow.…”

Section: A Governing Equationsmentioning

confidence: 99%

Investigation on Infrared Radiation Signatures of Under-Expanded Rocket Exhaust Plumes Due to Angle of Attack

et al. 2021

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A real flight trajectory varying from 5-60 km altitude was adopted for analyzing the effects of the angle of attack (AOA) on the IR signatures of rocket exhaust plumes. Three representative underexpanded states based on nozzle pressure ratio (NPR), including moderately under-expanded (NPR = 1.27), highly under-expanded (NPR = 12.5), and over-highly under-expanded (NPR = 120) states, were discussed. The results show that the appearance of the AOA shortens the plume scale size and afterburning region, but the peak temperature cannot significantly change. As an increase in the AOA, the high-temperature region and Mach cells are compressed to a small domain. The spectral radiant intensity is reduced and the decreasing rate is gradual for a large AOA. The peak radiance in the 2.7 μm band decreases, but that in the 4.3 μm band increases. The peak radiance curve shifted toward the increasing NPR as the AOA increases, and then the curve decreases monotonically from an initial "arched" shape. In addition, a group of band pairs can be observed by two intersecting in-band profiles as a function of altitude. The characteristic altitude of band pairs became more concentrated and moved toward low altitude with the increase in AOA.

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Section: A Governing Equationsmentioning

confidence: 99%

Investigation on Infrared Radiation Signatures of Under-Expanded Rocket Exhaust Plumes Due to Angle of Attack

et al. 2021

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“…The high-temperature plume and the high-temperature of the aircraft skin produced by the stealth aircraft in highspeed flight have prominent infrared radiation characteristics. Many institutions have published extensive research focusing on infrared signatures of stealth aircraft and many have also developed signature computational codes, which have been validated on extensive experimental data recording of aircraft (Mahulikar, S. P. et al 2001;Johansson, M. et al 2006;Mahulikar, S. P. et al 2007;Veiga, IV.. 2011;Baranwal, N. et al 2015;Sircilli, F. et al 2015;Lee, J. H. et al 2019;Hu, Hai.et al 2020). However, the study on the radiation signature difference of stealth aircraft over various spectrum ranges is minimal.…”

Section: Introductionmentioning

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.

show abstract

“…The high-temperature plume and the high-temperature of the aircraft skin produced by the stealth aircraft in highspeed flight have prominent infrared radiation characteristics. Many institutions have published extensive research focusing on infrared signatures of stealth aircraft and many have 2 also developed signature computational codes, which have been validated on extensive experimental data recording of aircraft (Mahulikar, S. P. et al 2001;Johansson, M. et al 2006;Mahulikar, S. P. et al 2007;Veiga, IV.. 2011;Baranwal, N. et al 2015;Sircilli, F. et al 2015;Lee, J. H. et al 2019;Hu, Hai.et al 2020). However, the study on the radiation signature difference of stealth aircraft over various spectrum ranges is minimal.…”

Section: Introductionmentioning

confidence: 99%

Detection Spectrum Optimization of Stealth Aircraft Targets From a Space-based Infrared Platform

et al. 2021

Preprint

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Advances in infrared detection techniques require novel spectrum dynamic-modification 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.

show abstract

Measurements of a micro gas turbine plume and data reduction for the purpose of infrared signature modeling

Cited by 7 publications

References 14 publications

Investigation on Infrared Radiation Signatures of Under-Expanded Rocket Exhaust Plumes Due to Angle of Attack

Investigation on Infrared Radiation Signatures of Under-Expanded Rocket Exhaust Plumes Due to Angle of Attack

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

Detection Spectrum Optimization of Stealth Aircraft Targets From a Space-based Infrared Platform

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