Research On The Measurement Of Ignition Process In The Aero-engine Afterburner

Ignition test, mainly to test whether there is the flame, and whether its process is normal and stable. Ignition detection of after-burner of aircraft engine can provide working state data of the ignition process for aircraft engine design and it helps to optimize the engine design, improve engine performance. However, very few works on ignition process inspection of after-burners of engine in close visual is reported in China at present. And uv detector is utilized in traditional ignition test process of after-burners, which can only get the result of the "fire", "not" ignition information, and can’t get the details of the ignition process. In this paper ignition system for aviation engine afterburner based on color camera ignition detection technology is designed and developed. The system can stand the high temperature and high pressure jet flow environment and it is placed 1 m to 2 m from the jet nozzle plane for afterburner ignition process observation from close range in real time.The paper firstly studies the collection module about the flame information, and proposes three optical conduction design, such as lens group, fiber, micro-camera. Through the analysis about the above methods, combined with the system requirements to determine the final method. Combined observation system design, the paper give the detection’s water-cooling system through the software Fluent. The detection system is installed inside of water-cooling system to prevent from the outside high temperature and pressure. Finally, the paper uses the gas fuel to simulate the ignition process, and analysis about the temperature field through the flame images.The observation system developed in this paper possesses features such as resistance to high temperature and high pressure, small in size, flexible installation, less number of detector and can provide real-time test information,which can provide references about color camera observation system worked in harsh environment for domestic research of flame detection system.