针对TiAl合金在压气机工况下的可燃性，分别基于实验的能量平衡分析方法和基于第一性原理结合热力学统计方法获得了TiAl合金表面氧化反应速率，然后采用数值模拟方法研究了来流速度、温度、压力、攻角对TiAl合金热自燃的影响，并给出了多级压气机设计点工况下强迫起燃所需的临界外加能量密度。结果表明：压力升高虽可促进表面氧化反应，但由于同时增强对流换热导致热自燃所需的临界来流温度反而上升；大攻角条件下流动分离显著降低换热效率使得临界自燃来流温度降低；在模拟的多级压气机设计点工况下，TiAl合金在无外加能量时均不发生自燃，但外加能量密度达到叶尖摩擦等故障对应的热流水平时，存在强迫起燃风险。本研究为评估TiAl合金在压气机环境中的适用安全性提供了参考。

To investigate the flammability of TiAl alloy under compressor conditions, the surface oxidation reaction rate of TiAl was obtained using both an experimental energy balance analysis and a first-principles approach combined with thermodynamic statistics. The effects of incoming flow velocity, temperature, pressure, and angle of attack on the thermal autoignition of TiAl alloy were investigated via numerical simulation. The critical external energy density required for forced ignition under typical multistage compressor design-point conditions was also determined. Results show that although increased pressure promotes surface oxidation, it concurrently enhances convective heat transfer, thereby raising the critical incoming flow temperature for autoignition. At high angles of attack, flow separation significantly reduces heat transfer efficiency, leading to a lower critical autoignition temperature. Under typical simulated conditions of a multi-stage compressor, TiAl alloy does not spontaneously ignite without external energy. However, when the external energy density reaches the thermal levels corresponding to faults such as blade tip friction, there is a risk of forced ignition. This study provides a theoretical basis for assessing the safety of TiAl alloy in compressor environments.