润轴发动机非均匀吞雨对粒子分离器性能的影响

Aiming at the influence of aviation non-uniformity rain swallowing condition on the performance of aeroengine, it was emphatically investigated that the influence rule of rain swallowing condition on the performance of particle separator in a turboshaft engine. Considered the physical phenomenon of pneumatic broken between rain drop and air, Eulerian-Lagrangian multiphase flow model was used to analyze the influence of rain swallowing ratio, rain partical diameter and non-uniformity rain swallowing condition on the aerodynamic performance of particle separator. Results show that scavenging ratio increases by 11. 34%, total pressure loss coefficient increases by 0. 36%, total pressure distortion decreases by 0. 328% and separation efficiency increases by 4. 2% with rain swallowing ratio from 0 to 8%; the increase of rain swallowing causes the higher separation efficiency and the lower outlet flow field distortion meanwhile the higher total pressure loss coefficient; there are 9. 78% decrease in scavenging ratio of particle seperator, 0.09% decrease in total pressure loss coefficient, 0.028% increase in total pressure distortion and 5. 27% increase in separation efficiency with rain partical diameter from 50 to 500 (Am; under the condition that the flow field distortion at the outlet of particle separator increases, die total pressure loss coefficient is lower and separation efficiency is higher with the increase of rain partical diameter; scavenging ratio decreases by 0. 92%, total pressure loss coefficient increases by 0. 004%, total pressure distortion increases by 0. 054% and separation efficiency increases by 1. 6 1 % under the condition of non-uniformity rain swallowing; the condition of non-uniformity rain swallowing results in higher total pressure loss coefficient and higher outlet flow field distortion, which leads to greater separation efficiency.