摘要
在研究国内外现有空气导管泄漏探测系统的基础上,搭建了管道泄漏探测试验台,并结合FLUENT三维泄漏流场的数值模拟,研究了不同导流洞大小、绝热层厚度及泄漏位置情况对泄漏探测性能的影响。试验结果与FLUENT计算结果表明:绝热层导流洞孔径及绝热层厚度的增大均能一定程度地增强感温线捕捉泄漏信号的效果;泄漏位置也会影响探测性能。给出了小孔泄漏流量的计算方法。研究结论可为国内飞机空气导管的相关研究工作提供参考。
Based on the study of the duct overheat detector of commercial and domestic aircraft in existing combined with the three-dimension flow field simulation of the leakage by FLUENT,the overheat detection experimental platform was built,the influences of the deflector size,thickness of the insulation and the leakage position on the detection performance were investigated by experiments.By analyzing the test results and FLUENT results,it is found that,the increasing of the deflector size and the insulation thickness will both increase the ability to capture leaking signals;the leakage position will affect the detection performance too,at the same time,the computing method of flow rate of eye-let leak is deriveed.The conclusion can provide technical reference for the related work upon ducts of domestic aircraft.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2015年第9期1183-1188,共6页
China Mechanical Engineering
关键词
高温压力管道
泄漏探测
试验
数值模拟
high-temperature pressure piping
leakage detection
experiment
numerical simulation
