轴流压气机叶片热清洗模拟方法建立及试验验证OA

To address salt spray deposition in aero engine compressors in marine atmospheric environments,the motion and deposition characteristics of salt spray particles,as well as the effectiveness of thermal cleaning,were systematically investigated using numerical simulation.The deposition characteristics of salt spray with different particle sizes were analyzed using the DPM(discrete phase model),while the atomization,impingement,and film formation processes of the cleaning liquid were simulated using a coupled VOF-to-DPM model and the Eulerian wall film model.The results show that salt spray deposition is mainly concentrated in the blade pressure surface and root regions,with a maximum total coverage of 31.38%.After thermal cleaning,the total cleaning coverage on the blade surface reaches 32.32%,with the highest coverage observed in the pressure surface of large blades(63.18%),whereas the suction surface and blade root regions exhibit poorer cleaning performance.Experimental verification demonstrates that the positions where cleaning droplets are predicted to cover in the simulation are all cleaned in the experiments,confirming the effectiveness of the thermal cleaning method established.These findings provide a theoretical basis for optimizing online cleaning strategies.