高原环境对车辆动力舱温度场及红外特性影响研究
Research on the influence of plateau environment on the temperature field and infrared characteristics of vehicle power cabin
李耀宗 1任登凤 1韩玉阁1
作者信息
- 1. 南京理工大学 能源与动力工程学院,南京 210094;南京理工大学 电子设备热控制工信部重点实验室,南京 210094
- 折叠
摘要
高原环境下,发动机、冷却系统等部件的运行状况发生较大变化,对动力舱室热环境产生影响,给目标的红外特性预测带来困难.对高原环境下动力舱及内部柴油机的运行状况进行仿真,采用GT-POWER软件建立一维传热模型,对柴油机在西藏贡觉县运行时的状况进行模拟,并将结果与高原环境下三维目标温度场模型进行耦合,获得动力舱的三维温度场分布情况.基于此建立目标红外辐射特征模型,对动力舱的辐射特性进行计算.结果表明:相较于平原地区,高原地区柴油机的燃烧状况较差,功率及扭矩分别降低 160 kW和 782 N·m,有效燃油消耗率增大46 g/(kW·h);动力舱室表面温度有不同程度降低;排烟及周围部位的温度场及红外特征更为明显.
Abstract
In the plateau environment,the operating conditions of the engine,cooling system and other components change greatly,which has an impact on the thermal environment of the power compartment and makes it difficult to predict the infrared characteristics of the target.The operation status of the power cabin and the internal diesel engine in the plateau environment is simulated,and the one-dimensional heat transfer model is established by GT-POWER software to simulate the operation of the diesel engine in Gongjue County in Tibet,and the results are coupled with the three-dimensional target temperature field model in the plateau environment to obtain the three-dimensional temperature field distribution of the power cabin.Based on this,the target infrared radiation characteristic model is established and the radiation characteristic of the power cabin is calculated.Results show:compared with the plain area,the combustion condition of diesel engine in the plateau area is poor,the power and torque are reduced by 160 kW and 782 N·m,the BSFC increases by 46 g/(kW·h).The surface temperature of the power cabin decreases to different degrees.The temperature and infrared characteristics of smoke exhaust and surrounding parts are more obvious.
关键词
高原环境/发动机/GT-POWER/温度场/红外特性Key words
plateau environment/engine/GT-POWER/temperature field/infrared characteristics引用本文复制引用
基金项目
装备预研共用技术项目(50916020202)
出版年
2024
NETL
NSTL
万方数据