IR signature study of aircraft engine for variation in nozzle exit area

Baranwal, Nidhi; Mahulikar, Shripad P.

doi:10.1016/j.infrared.2015.11.001

Cited by 18 publications

(3 citation statements)

References 15 publications

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“…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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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: 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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“…With the advancement of the infrared and radar detectors, the super stealth feature has been essential for the next-generation fighters to complete the military missions [14]. The engine exhaust system reflects the strongest infrared signature and main radar cross section in an aircraft [15]. The serpentine nozzles have the unique advantages for reducing the infrared signature and radar cross section of the exhaust system.…”

Section: Introductionmentioning

confidence: 99%

Influences of nozzle pressure ratio on flow characteristics of serpentine multi-stream supersonic nozzle

Meng,

Shi,

Zhou

et al. 2024

J. Phys.: Conf. Ser.

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The serpentine multi-stream supersonic nozzle (SMSN) is adopted for the multi-stream exhausted system of the Adaptive Cycle Engine to enhance the stealth performance of next-generation fighter. In this paper, the effects of the nozzle pressure ratio (NPR) on the flow characteristics of the SMSN were studied using the numerical simulation method validated by experimental data. The serpentine configuration leads to the nonuniform pressure distribution. At the mixing position, the expansion and shock waves are generated due to the pressure difference. As the NPR increases, the flow separation and shock wave in the mixing section gradually weaken and disappear. The thrust coefficient rises first and then drops. Due to the flow separation under the design condition, the thrust coefficient is the largest at MPR=6 and TPR=2.272. As the MPR increases at TPR=1.893, the compression effect of the main flow is enhanced on the upper third flow. The thrust coefficient rises first and then drops, and reaches the maximum at MPR=6. As the TPR increases at MPR=5, the compression effect of the main flow is weakened on the upper third flow. The thrust coefficient rises first and then drops, and reaches the maximum at TPR=2.272.

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“…Because of the friction between the aircraft and the atmosphere during high‐speed flight, some thermal elements have significantly higher infrared radiation than the surrounding air, it is therefore easily detected by infrared detection. [ 49 ] Consequently, low infrared emission coatings are critical. Coatings composed of semiconductor metal oxides and inorganic binders may exhibit low infrared emissivity and high‐temperature resistance.…”

Section: Introductionmentioning

confidence: 99%

Method and Application of Surface Modification of Cerium Dioxide

Wang,

Xu,

Zhao

et al. 2024

Adv Eng Mater

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Airborne pollutants, such as nitrogen oxides (NOx), and waterborne contaminants, including heavy metals, dyes, and other pollutants, pose substantial environmental threats and jeopardize human health. Additionally, certain limitations have hindered the widespread application of some batteries, primarily attributed to elevated operating temperatures and the decreasing use of fossil fuels. In response to these challenges, cerium dioxide (CeO2) nanoparticles have garnered considerable attention due to their unique and advantageous physical and chemical properties. Furthermore, the incorporation of CeO2 into various coating materials has demonstrated the potential to significantly enhance their performance. In the realm of biotechnology, research into CeO2 nanoparticles continues to expand, encompassing a range of applications such as the scavenging of reactive oxygen species (ROS) in biological systems, the development of anti‐inflammatory agents, and cancer research. Nevertheless, in these diverse applications, CeO2 still exhibits certain limitations that hinder the achievement of desired outcomes. The modification of CeO2 nanoparticles presents a promising avenue to address these limitations, thereby improving their overall efficacy. As such, this review aims to comprehensively compare and summarize various methods for the modification of CeO2 nanoparticles, elucidate their practical applications, and provide insights into the potential challenges and future prospects in this field.This article is protected by copyright. All rights reserved.

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IR signature study of aircraft engine for variation in nozzle exit area

Cited by 18 publications

References 15 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

Influences of nozzle pressure ratio on flow characteristics of serpentine multi-stream supersonic nozzle

Method and Application of Surface Modification of Cerium Dioxide

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