基于流体-固体热合的加热条件下的航空发动机油管安全性研究
Yuepeng Yang1, Fang Wang1,2,3, Fang Wen1
1School of Energy and Power Engineering, Beihang University (BUAA), Beijing 100191, China.
Materials (Basel, Switzerland)
|November 9, 2024
概括
航空发动机管道安全受到燃料流量减少的影响,导致温度升高和破裂风险增加. 这项研究分析了在模拟火灾条件下携带煤油的不钢管中的热应力.
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
- 热力学是一种热力学.
背景情况:
- 航空发动机管道面临极端条件,包括高温和潜在的火灾暴露.
- 在热应力下评估管道完整性对于飞行安全至关重要.
- 不钢 (1Cr18Ni9Ti) 是这些关键部件的常见材料.
研究的目的:
- 在各种加热条件下评估航空发动机管道的安全性.
- 分析煤油流速对管道壁温度和应力的影响.
- 确定在哪些条件下增加管道破裂风险的条件.
主要方法:
- 一个航空发动机油管的计算模型是根据消防测试标准开发的.
- 进行了流体-固体热合模拟.
- 分析包括变化的中国RP-3煤油入口流量,以模拟运行和故障场景.
主要成果:
- 在标准加热下,在管道壁中观察到不均的温度分布.
- 煤油流量下降导致管道壁温度升高和热传递恶化.
- 高温降低了材料的强度,并产生了热应力.
结论:
- 减少煤油流量显著增加了航空发动机管道安全风险.
- 高温和热应力可以超过材料的屈服强度,冒着破裂的风险.
- 保持充足的燃料流量对于防止火灾事件中管道故障至关重要.
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