关键词: 高温压力管道, 泄漏探测, 试验, 数值模拟

Abstract:

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 eyelet leak is deriveed. The conclusion can provide technical reference for the related work upon ducts of domestic aircraft.

Key words: high-temperature , pressure , piping;leakage detection;experiment;numerical , simulation