Because military assets often operate at temperatures different from their surroundings, they exhibit thermal signatures
observable with infrared (IR) imaging systems operating in the
mid-wave (MWIR) and long-wave (LWIR) infrared
bands of the spectrum. Reducing these thermal signatures provides a means of making these assets blend in with their
environments. Most often the assets are warmer than their environment because they must dissipate heat generated
internally from electronics, engines, or personnel. The radiation emitted by these assets is strongly dependent on the
temperature and the emissivity of the exposed surfaces. Thus, by reducing the emissivity or the temperature, or both, the
thermal signatures can be reduced. The current study addresses the use of extended surfaces, or fins, to reduce the
temperature of heat dissipating surfaces. Analytic, experimental, and computational studies are performed which
demonstrate that extended surfaces offer an effective way to reduce the temperature of exposed surfaces while still
dissipating the heat generated by the asset.
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