发动机舱通风冷却快速评估方法研究
Research on rapid evaluation method for ventilation and cooling in engine cabin
高鹏 1王睿 1杨水锋 1刘开磊1
作者信息
- 1. 成都飞机设计研究所,成都 610000
- 折叠
摘要
针对飞行器在高速巡航状态下发动机舱热环境复杂,缺乏准确快速评估手段的难题,基于一维数学模型提出了一种发动机舱通风冷却快速评估方法.在分析发动机舱典型的热环境及传热特点的基础上,分别建立了发动机舱通风冷却的三维CFD模型以及基于AMESIM的快速评估数值模型.具体分析了不同冷却气流量、温度下发动机舱的温度分布,比较了2 种模型之间的相对误差.结果表明:冷却气流量在0.2～1.0 kg/s时,快速评估数值模型与三维CFD模型计算结果相对误差最大不超过3.5%;冷却气温度在353.15～423.15 K时,快速评估数值模型与三维CFD模型计算结果相对误差最大不超过4%.
Abstract
Aiming at the complicated thermal environment of engine compartment and the lack of accurate and rapid evaluation method,a rapid evaluation method of engine compartment ventilation and cooling based on one-dimensional mathematical model was proposed.Based on the analysis of typical thermal environment and heat transfer characteristics of engine cabin,the three-dimensional CFD model of ventilation and cooling of engine cabin and the numerical model of rapid evaluation based on AMESIM are established.The temperature distribution of engine cabin under different cooling gas flow rate and temperature is analyzed,and the relative errors between the two models are compared.The results show that when the cooling gas flow rate is0.2～1.0 kg/s,the relative error between the numerical model and the three-dimensional CFD model is less than 3.5%;When the cooling gas temperature is 353.15～423.15 K,the relative error between the rapid evaluation numerical model and the three-dimensional CFD model is less than 4%.
关键词
发动机舱/通风冷却/热环境/数值模拟Key words
engine cabin/ventilation and cooling/thermal environment/numerical simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据