Air Entrainment by Infrared Suppressors: A Brief Review on Current Practices

Abstract:

Infrared suppression devices are one of the vital components of naval or cargo-ships, as they entrain the cold ambient air, and mix with hot exhaust gas from silencer cooling down the outgoing gas. By doing this, the overall temperature of the outgoing gas is reduced exhibiting a low infrared (IR) emission and concealing the ship from the ease of dictation by enemy ship. The host ship avoids the potential threat and safely operates during a mission operation. This paper is aimed at providing a brief review on the different infrared suppression devices, which are used in naval or cargo ships to reduce their detectability in a sea chest in a war-like situation. This article may help the researchers and designers as first-hand information and current practices used in designing infrared suppression device (IRS) devices for naval and cargo ships.

• Periodical: Applied Mechanics and Materials (Volume 930)
• Pages: 107-114
• DOI: https://doi.org/10.4028/p-pe3Cqu
• Online since: February 2026
• Authors: Ramesh Chandra Mishra*, Ramesh K. Mallik, Ashok K. Kumar Barik
• Keywords: Cylindrical/Conical Funnel, Hybrid IRS, Infrared Suppression, Turbulence

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