A Study on the Heat Flow Characteristics of IRSS

2017 4th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造

Cho, Yong-Jin^1 ; Ko, Dae-Eun^1

Dept. Naval Architecture and Ocean Engineering, Dong-Eui University, Busan, Korea, Republic of^1

关键词: Combustion engines;    Heat flow analysis;    Infrared signature;    Infrared signature suppressions;    Metal surfaces;    Pressure differences;    Test Modeling;    Weapon system;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/269/1/012091/pdf
DOI  :  10.1088/1757-899X/269/1/012091

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The infrared signatures emitted from the hot waste gas generated by the combustion engine and generator of a naval ship and from the metal surface around the funnel are the targets of the enemy threatening weapon system, thereby reducing the survivability of the ship. Such infrared signatures are reduced by installing an infrared signature suppression system (IRSS) in the naval ship. An IRSS consists of three parts: an eductor that creates a turbulent flow in the waste gas, a mixing tube that mixes the waste gas with the ambient air, and a diffuser that forms an air film using the pressure difference between the waste gas and the outside air. This study analyzed the test model of the IRSS developed by an advanced company and, based on this, conducted heat flow analyses as a basic study to improve the performance of the IRSS. The results were compared and analyzed considering various turbulence models. As a result, the temperatures and velocities of the waste gas at the eductor inlet and the diffuser outlet as well as the temperature of the diffuser metal surface were obtained. It was confirmed that these results were in good agreement with the measurement results of the model test.