喷管喉道面积变化对大涵道比分排涡扇发动机性能的影响

使用Gasturb软件计算和分析了大涵道比分排涡扇发动机内、外涵喷管喉道面积变化对发动机性能的影响。在低压转子换算转速一定的控制规律下,研究了某型发动机喷管喉道面积变化对发动机转差、裕度、涡轮进口温度、推力、耗油率的影响。经过对比这些相互关系,可以得到1个最合理的内、外涵的喷管面积,从而指导用户最大限度地优化发动机的性能和延长发动机的使用寿命。

Effect of Nozzle Throat Area Variation on Performance of High Bypass Ratio Turbofan Engine with Separate Flow

The effect of core and bypass throat area variation on the performance of high bypass ratio turbofan engine with separate flow was calculated and analyzed by the Gasturb Software.At the control schedule of the constant low spool corrected speed,the effect of the nozzle area variation on rotor speed difference between high and low pressure spool,surge margin,turbine inlet temperature,thrust and SFC were investigated for an aeroengine.The most reasonable core/bypass nozzle throat area was obtained by comparing these relations,thus the users were instructed how to utmost optimize the performance and extend operational life for engine.