Research Of Burner Characteristics In The Fire Test Of Aviation Engine Components

Aeroengine components fire test is an important part of continued airworthiness verification, but also one of the focus of recent domestic aeroengine engineering. In the aeroengine fire test, the flame generated by burner has an important influence on the test results. Fire test results directly related to the fire judgement of engine components and influence the continued airworthiness of the aeroengine, so the study of the experimental burner feature is very necessary.This paper studies the burner characteristics in the fire test including turbulence, discrete items coupled with the continuous phase, multi-step chemical reaction model and radiation model and so on by performing computing calculations based on ANSYS, TECPLOT software. The main objects of computing include Carlin burner in the FAA Powerplant Engineering Report, NexGen burner in AC-20-135 and propane burner in ISO:2685. Flow field, temperature field, the concentration distribution of the components and the sample surface heat flux and other basic parameters are achieved by the simulation. The simulation results can provide a reference for burner settings in further domestic aeroengine fire test.engine.1. Simulation of Carlin burnerCarlin burner flame characteristics including the flow field, temperature field, convection and radiation heat exchange heat and so on is achieved by calculating the flow field, the coupling effect between the components of chemical reactions and radiation, with fuel.The simulation result is compared with the simulation data in the reference and experimental results to verify the application of mathe models loaded and supply reference for the simulation of Nexgen burner.2. Simulation of Nexgen burnerNexgen burner flame characteristics in 3 different equivalence ratio conditions including velocity field, temperature field and heat transfer characteristics and other parameters isachieved by simulation with fuel and the variation of the characters with the changing of equivalence ratio is analyzed. The way for Carlin burner to produce swirl velocity for flow is to add swirl velocity at the entrance; As for Nexgen burner, swirl flows are generated by swirler loacated in the air tube before the fuel nozzle.3. Simulation of propane burnerNexgen burner flame characteristics in 3 different equivalence ratio conditions including velocity field, temperature field and heat transfer characteristics and other parameters is achieved by simulation with fuel propne. The reaction rate of gas and liquid fuel is compared.4. Comparison of characteristics of the 3 burnersAnalyzing the performance of the 3 different burners above via comparing the flame characteristics including flow field, temperature field, buoyancy effect and the efficiency of the sample's surface and so on.