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Sensitivity Study on the Infra-Red Signature of Naval Ship According to the Composition Ratio of Exhaust Plume

폐기가스 조성 비율이 적외선 신호에 미치는 영향 연구

  • Cho, Yong-Jin (Department of Naval Architecture and Ocean Engineering, Dong-Eui University)
  • 조용진 (동의대학교 조선해양공학과)
  • Received : 2018.01.26
  • Accepted : 2018.04.06
  • Published : 2018.04.30

Abstract

Infrared signatures emitted from naval ships are mainly classified into internal signatures generated by the internal combustion engine of the ship and external signatures generated from the surface of the ship heated by solar heat. The internal signatures are also affected by the chemical components ($CO_2$, $H_2O$, CO and soot) of the exhaust plumes generated by the gas turbine and diesel engine, which constitute the main propulsion system. Therefore, in this study, the chemical composition ratios of the exhaust plumes generated by the gas turbines and diesel engines installed in domestic naval ships were examined to identify the chemical components and their levels. The influence of the chemical components of the exhaust plumes and their ratios on the infrared signatures of a naval ship was investigated using orthogonal arrays. The infrared signature intensity of the exhaust plumes calculated using infrared signature analysis software was converted to the signal-to-noise ratio to facilitate the analysis. The signature analysis showed that $CO_2$, soot and $H_2O$ are the major components influencing the mid-wave infrared signatures of both the gas turbine and diesel engine. In addition, it was confirmed that $H_2O$ and $CO_2$ are the major components influencing the long-wave infrared signatures.

Keywords

Composition ratios of exhaust plume;Infra-red signature;Sensitivity;Survivability;Naval ship

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