摘要
在分析现有民用飞机空气导管过热探测系统工作原理的基础上,指出飞机空气导管过热探测系统的不足。基于热敏材料特性和组合电路,设计了一种高温压力管道过热探测系统及方法,实现了对高温压力管路的过热报警并定位的功能,并提出了相应的优化方案。通过搭建管道过热探测试验台,对设计的方案进行了试验验证,并考察过热段长度及管内气体温度对探测系统响应时间的影响。研究结果表明:探测系统的响应时间随着管道内气体的温度升高而减少,但当管内温度达到一定值时,响应时间几乎保持不变。同时,探测系统的响应时间随着过热段的长度增加而减少。
Based on the study of the duct overheat detection system of civil aircraft in existence,its shortage is pointed out.Therefore a modified overheat detection system is designed with heat-sensitive property material and combinational circuits,which owns the capabilities of alarm and location for the hightemperature and pneumatic duct overheat part.Some interrelated optimization methods are put forward as well.Also,the overheat detection experiment platform is built and the designed detection system is validated experimentally.The influences of the overheat length and the response time of internal air temperature on the system are conducted.The research results show that the response time of the detection system decreases with the increase of temperature of the internal air and the response time remains approximately constant when the temperature reaches a certain value.Meanwhile the response time of the detection system decreases with the increase of overheat length.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2014年第4期618-624,共7页
Journal of Nanjing University of Aeronautics & Astronautics
关键词
高温压力管道
过热探测
定位
high-temperature and pneumatic duct
overheat detection
location
