Research on infrared radiation characteristics of aircraft-ship coupling targets

机-舰耦合目标的红外辐射特性研究

¹ School of Power and Energy, Northwestern Polytechnical University, Xi'an 710129, China
² China Ship Development and Design Center, Wuhan 430064, China

Received: 18 September 2024

Abstract

In order to study the infrared radiation characteristics of the coupled aircraft-ship target, the steady-state flow field of the isolated aircraft carrier model, the on-board aircraft waiting-to-fly model and the on-board aircraft leaving-ship model was simulated by CFD method. The infrared radiation intensity of three models was calculated based on the flow field results and the inverse Monte Carlo method, and the influence of the carrier-based aircraft and its tail jet on the infrared radiation characteristics of the target was analyzed. The results show that the tail jet heats the flame shield and its adjacent deck, and the maximum wall temperature of the flame shield of the on-board aircraft waiting-to-fly model is around 1 700 K. In the infrared detection band of 3 to 5 μm, the infrared characteristics of the on-board aircraft waiting-to-fly model on the horizontal detection plane are very prominent at the forward detection Angle of the ship body, and the infrared radiation intensity of the on-board aircraft waiting-to-fly model on the pitch detection plane is about 691.6% higher than that of the isolated aircraft carrier model.

摘要

为研究机舰耦合目标的红外辐射特性, 利用CFD方法对孤立航母模型、载机待飞模型和载机离舰模型进行了稳态流场的模拟, 基于流场结果和逆向蒙特卡洛法计算了3种模型的红外辐射强度, 分析了舰载机及其尾喷流对目标红外辐射特征的影响。研究结果表明: 舰载机的尾喷流使得阻焰板及其附近大面积的甲板被加热, 载机待飞模型的阻焰板最高壁温在1 700 K左右; 在3~5 μm红外探测波段, 水平探测面上载机待飞模型在舰体前向探测角下的红外特征非常突出, 俯仰探测面上载机待飞模型在舰体前向探测角下的红外辐射强度相比于孤立航母模型平均高出约691.6%。