典型使用条件对发动机涡轮叶片蠕变寿命消耗的影响研究

Impact of Typical Operating Conditions on Creep Life Consumption for Aero Engine Turbine Blade

为开展发动机涡轮叶片使用寿命监视及掌握典型使用条件对高压涡轮叶片蠕变寿命消耗的影响规律,利用发动机性能仿真程序与使用载荷多场耦合分析方法建立了涡轮叶片寿命消耗综合分析模型,并通过引入寿命消耗因子,定量给出了飞行高度、环境温度、飞行马赫数、高压转子转速等使用条件对涡轮叶片温度与应力以及蠕变寿命消耗的影响规律。结果表明,各使用因素均对涡轮叶片的蠕变寿命消耗具有较大影响,其中以高压转子转速的影响最大,转速升高1%其对数寿命消耗因子升高约0.4。

In order to develop turbine blade life usage monitoring and understand impact of typical operating conditions on creep life consumption of high pressure turbine blade,an integrated turbine blade life consumption analysis model was established based on engine performance simulation model and multi-field conjugate method. Through introducing the life consumption factor, quantitative impact of typical operating conditions,such as flight altitude,ambient temperature,flight Mach number and high pressure rotor speed,on turbine blade temperature,stress and creep life consumption was found. Results show that operating condition indeed has a significant impact on turbine blade creep life consumption, among which the high pressure rotor speed has the maximal impact that logarithmic life consumption factor increases about 0.4 with rotor speed raise 1%.