舰船燃气轮机排气系统的不同红外抑制措施实验研究
Experimental study on different infrared suppression measures for ship gas turbine exhaust system
夏文翀 1张勃 1祝华哲 1马壮 1姜小荧2
作者信息
- 1. 南京航空航天大学 能源与动力学院,江苏 南京 210016
- 2. 上海船用柴油机研究所,上海 201108
- 折叠
摘要
[目的]为了有效提高舰船红外隐身能力,需降低舰船燃气轮机排气系统在 3～5 μm波段内的红外辐射特征.[方法]通过实验测量舰船燃气轮机排气系统在 3～5 μm波段内的红外辐射特征分布,对比分析喷水冷却、导流锥以及引射套筒对排气系统红外辐射强度的影响规律.[结果]实验结果表明:相较于基准导流锥排气引射模型,在喷水冷却条件下,舰船燃气轮机排气系统在 0°,45°,90°方位角下的辐射强度分别下降了 32.4%,21.9%,61.5%;未采用导流锥时,90°方位角下的辐射强度下降了 40.1%;去除引射套筒之后,0°方位角下的辐射强度下降了 29.5%,即喷水冷却可以较明显地抑制排气系统在大角度和小角度下的 3～5 μm波段内的红外辐射特征.[结论]研究成果可为舰船红外隐身设计提供参考.
Abstract
[Objective]In order to effectively improve the infrared stealth capability of ships,it is necessary to reduce the infrared radiation characteristics of the ship gas turbine exhaust system within the band of 3-5 μm.[Methods]Experiments are carried out to measure the infrared radiation characteristic distribution of a ship gas turbine exhaust system within the band of 3 μm to 5 μm,and the influence of the deflection cone,ejector sleeve and spray cooling on the infrared radiation intensity of the exhaust system are then compared and ana-lyzed.[Results]When compared to a standard deflection cone exhaust injection model,the infrared radi-ation intensity of the ship gas turbine exhaust system decreases by 32.4%,21.9% and 61.5% at azimuth angles of 0°,45° and 90° respectively under spray cooling conditions.Without using the deflection cone,there is a decrease in radiation intensity by approximately 40.1% at an azimuth angle of 90°.The removal of the ejector sleeve effectively suppresses infrared radiation,with a decrease in radiation intensity of 29.5% at an azimuth angle of 0°,indicating that spray cooling significantly inhibits infrared radiation characteristics within the band of 3 μm to 5 μm at both large and small angles.[Conclusion]The results of this study can provide valuable references for ship infrared stealth design.
关键词
排气系统/红外辐射/引射套筒/喷水冷却/导流锥Key words
exhaust system/infrared radiation/ejector sleeve/spray cooling/deflection cone引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据