利用时间倾斜算法（Time Inclined Method，TI）对单级和多级涡轮中的热斑输运现象进行非定常计算，与常规（时间推进）非定常数值计算结果对比，探索时间倾斜算法在涡轮热斑输运过程预测中的优势和局限性。结果表明：时间倾斜算法通过减小计算域，提高了非定常计算的效率；动静交界面周向平均时均温度分布与时间推进法计算结果相比偏差较小，分布趋势一致；但是时间倾斜算法在叶轮非等栅距的计算中，对周向节距比仍有一定限制，在时间倾斜算法中对叶片数约化会对不同叶高的温度周向分布的预测产生偏差。对动静交界面上温度分布采用空间傅里叶变换的结果表明，时间倾斜算法能够模拟得到与热斑数及其倍数对应的温度波动幅值，但不能预测数量互质的叶片与热斑相互干涉所导致的不规则温度分布。

The time inclined method (TI) is used to analyze the hot streaks migration in singlestage and multistage turbines.To validate the TI method,the predicted characteristics of temperature distribution is compared with the conventional (time marching) unsteady numerical simulation.The results show that the time inclined method adopted in this paper improves the efficiency of unsteady computation by reducing the computational domain.The mean deviations of circumferentially and radially timeaveraged temperatures on the stage interface are smaller than those calculated by time marching method.However,the TI still has some limitations,and the use of blade reduction in the TI will cause deviation in the prediction of the circumferential migration angle of hot streaks.The spatial Fourier Transform is carried out for the circumferentially timeaveraged temperature distribution on the stage interface.It points out that the TI method can capture the temperature fluctuation amplitude corresponding to the number and multiple of hot streaks,but cannot predict the irregular temperature distribution caused by the interaction between blades and hot streaks.

江苏省自然科学基金项目（BK20180863）；镇江市科技计划资助(GY2018029)