结构设计和热传输性能分析新型复合相变活性冷却通道壁的高超音速飞机的结构设计和热传输性能分析
Weichen Li1, Jieliang Zhao1, Xiangbing Wu1
1School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Micromachines
|May 25, 2024
概括
一个新的蜂式冷却通道结构增强了超音速飞机的热保护系统 (TPS). 这种相变材料填充的设计显著改善了散热,降低了高速飞行期间的高峰温度.
科学领域:
- 航空航天工程 航空航天工程
- 材料科学 材料科学 材料科学
- 热管理 热管理
背景情况:
- 超音速飞机的当前热保护系统 (TPS) 面临着在高速机动时产生的散热方面的挑战.
- 现有的TPS设计受限于单一材料结构,导致低效的散热.
- 有效的热管理对于高超音速车辆的性能和完整性至关重要.
研究的目的:
- 为TPS提出和研究一个创新的多层对流冷却通道结构.
- 使用相变材料 (PCM) 和拓优化设计和分析一个主动冷却通道 (PCM-HC).
- 在各种条件下评估PCM-HC墙壁的热性能.
主要方法:
- 开发一种以蜂巢为灵感的对流冷却通道结构.
- 在PCM-HC设计中应用可变密度拓优化.
- 数字模拟分析热性能,受PCM特性,几何和类型的影响.
主要成果:
- 拟议的蜂状PCM-HC墙体通过结合对流冷却和PCM潜热来证明其优越的散热能力.
- 在50kW/m2的热量流量下,观察到最大内壁温度下降12K至20K.
- 不同的PCM由于其独特的热物理特性,对传热性能产生不同的影响.
结论:
- PCM-HC结构为高超音速飞机TPS的散热提供了显著的改进.
- 该研究为设计先进,高效的冷却通道提供了理论基础.
- 这项研究有助于提高未来高超音速车辆的热管理策略.
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