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在非稳态条件下对分隔式双流道涡轮进行了数值模拟,得到了呈现出充盈和排空效应的涡轮非稳态特性圈;并分别从宏观和微观角度对涡轮非稳态特性进行了分析。结果表明:在同一个非稳态特性圈内,排空段的平均效率较充盈段高17.17个百分点,主要原因在于排空段的流速高于充盈段;内外流道脉冲波形成的非稳态特性圈之间的区别主要在充盈段,内流道充盈段的非稳态平均效率较外流道充盈段高10个百分点;脉冲波从内流道进入时,涡轮的总体流动损失小,即总体熵增较小。
Under unsteady conditions, the numerical simulation of the double-spooled twin-turbomachine turbine was carried out, and the turbulent characteristics of the turbomachine were obtained. The unsteady characteristics of the turbomachine were analyzed from macroscopical and microscopic perspectives . The results show that the average efficiency of the emptying section is 17.17% higher than that of the filling section in the same non-steady-state characteristic circle, which is mainly due to the fact that the velocity of the emptying section is higher than that of the filling section. The unsteady state The difference between the characteristics of the main circle in the filling section, the inflow section of the inflow section of the non-steady-state average efficiency than the outer flow channel filling section higher by 10 percentage points; pulse wave from the inflow channel, the turbine flow loss is small, Entropy increase smaller.