为了掌握对转涡轮内部的复杂流动以改进航空燃气轮机的设计,利用数值模拟手段对所设计的1+1/2对转涡轮内部非定常流动进行了研究,将定常和非定常结果进行了详细的对比分析,结果表明:非定常结果与定常结果相比出功比减小,总效率约减小0.44%,流量基本不变,其中尾迹、激波、位势作用以及泄漏流等因素之间的相互作用是影响非定常特性的主要因素. In order to grasp the complex flow inside the turbine and to improve the design of the aircraft gas turbine, the unsteady flow in the designed 1 + 1/2 counter-rotating turbine was studied by means of numerical simulation, and the steady and unsteady results were detailed The results show that, compared with the steady results, the unscheduled results reduce the work efficiency ratio, the total efficiency decreases by about 0.44%, and the flow rate basically does not change. Among them, wake, shock, potential effect and leakage flow and other factors Interaction is a major factor affecting unsteady behavior.