A Mission Based Optimization Study of Engine Configurations for a Low-Signature Reconaissance UAV - A Multi-Objective Approach

Wallin, Markus; Grönstedt, Tomas; Håll, Ulf

doi:10.2514/6.2003-6528

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2007

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“…Trends in thermodynamic cycle parameters which improve the cycle efficiency and lower fuel consumption also lower the heat rejection from engine. Therefore, for given operating point, these trends also lower engine IRSLs [67,110]; however, afterburning increases IR emissions by almost 10-folds [67]. A non-axisymmetric nozzle has lesser IR emissions than an axisymmetric nozzle, because the internal engine hot parts are largely masked by the non-axisymmetric nozzle hardware [102].…”

Section: Exhaust Systemmentioning

confidence: 95%

Infrared signature studies of aerospace vehicles

Mahulikar

Sonawane

Rao

2007

Progress in Aerospace Sciences

293

111

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Infrared (IR) emissions from aircraft are used to detect, track, and lock-on to the target. MAN Portable Air Defence Systems (MANPADS) have emerged as a major cause of aircraft and helicopter loss. Therefore, IR signature studies are important to counter this threat for survivability enhancement, and are an important aspect of stealth technology. This paper reviews contemporary developments in this discipline, with particular emphasis on IR signature prediction from aerospace vehicles. The role of atmosphere in IR signature analysis, and relation between IR signature level and target susceptibility are illustrated. Also, IR signature suppression systems and countermeasure techniques are discussed, to highlight their effectiveness and implications in terms of penalties.

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